Showing 1 to 1059 results out of 1059
Hello, Could you tell me how to connect 2 pipes, one cast iron and the other stainless steel, DN...

By Eric H., on 12/14/2015

Just read an article from Duperon technologies about comparingslot-type screensand...

By Amy, on 12/17/2015


Hi all, Do you have any positive feedback on bar screens (gap 20-30 mm)? Looking for ones wider tha...

By YVART_Pascal, on 12/27/2015

We are looking to install Palmer-Bowlus or Parshall flumes with ultrasonic transducers in our sewers...

By Amy, on 12/27/2015

What type of injector do you use to add chlorine (bleach) to a pressurized pipe?...

By gilles-b, on 01/04/2016

Hello, There is a methane bioreactor located near our WWTP. Our plant currently receives a substan...

By Vince, on 01/06/2016

Due to safety issues related to chlorine’s use and handling should Canada consider alternatives su...

By Sam, on 01/12/2016

Does any one have experience with Bio-film. The stuff that is being called biofilm is in our water s...

By Brad, on 01/14/2016

Hello, We operate an industrial aerated lagoon. Recent tightening of discharge standards (down to 1...

By Sanpo, on 01/15/2016



To avoid having to wire with an RJ45 cable...

By loicbross, on 01/19/2016


Saw an interesting tweet on your page from Davos and how water is valuable. I am wondering ...Is edu...

By Charlie, on 01/22/2016


I've read that it can cause permanent brain damage and behavioral problems, is that true? I live in...

By Andy8, on 01/24/2016


Hello all, I have been consulted by a client who is experiencing recurring problems with legionella...

By FB, on 01/26/2016

Bonjour, I imagine your facility or storm water drainage system is equipped with a flow monitor, in...

By Tonino, on 01/26/2016

The seal on a penstock that controls a storage basin was improperly installed and has broken. As it...

By Marshall, on 01/26/2016

Hello, A commercial client (water park-tubing) is experiencing a problem with green algae bloom dur...

By ELMLO, on 01/28/2016

The Ohio's environmental protection agency said it has "reason to suspect that the operator falsifie...

By clairebear, on 01/29/2016

Are you aware of any foam detection sensors, sprinkler systems or any other way of preventing our ve...

By JIM, on 02/01/2016

What sort of financial assistance is available to property owners requested to remove trees interfer...

By Asher1980, on 02/02/2016

Lead levels have been on the rise in our residential water system for some time now. Wondering what...

By Ouananiche, on 02/02/2016

Is it possible to use a vacuum truck without damaging it? Thank you....

By canardo26, on 02/03/2016






Once you screen out the inorganic solids and remove the organics and bacteria, what would you expect...

By Rupert_Whiting, on 02/11/2016

I'm a operator a treatment plant in California and we receive an ungodly quantity of trash. Every ho...

By Nick_at_RH2O, on 02/12/2016

I've been challenged by the Bill & Melinda Gates Foundation to show that we can kill/disable or...

By Rupert_Whiting, on 02/12/2016

...

By Asher1980, on 02/13/2016

We often—but not continuously—find excess foam on our WWTP between the aeration tank and the cla...

By rienkedelo, on 02/15/2016

Analysis, benchmarking, human resources or funding ...which is the primary challenge fac...

By Amy, on 02/16/2016

How can we remove odor at a water treatment plant?...

By SamY, on 02/17/2016

I think we all here know that many of the problems we face at the plants could be prevented if there...

By Duncan, on 02/17/2016

The only current indicators are the hour-meter on the extractor and the theoretical flow....

By Breizh'eau, on 02/18/2016

Hi, I have to replace a hydro ejector at the bottom of a cylindrical retention basin of 500 m3 (14...

By Espelette, on 02/19/2016

I am always into "green" solutions, interested in seeing thoughts on this!...

By arnold, on 02/20/2016

Hi, We have to equip our bypasses with a device to measure (as opposed to estimate) discharge into...

By EtLeMondeSeraMeilleur, on 02/21/2016

Hi, Can you share any information regarding hydrogen sulfide elimination using reagents? Thank...

By Espelette, on 02/22/2016

I recently came across a guy who is developing new pumps for smaller-scale applications and I need t...

By Rupert_Whiting, on 02/22/2016

I am looking for a technique to transfer dried sludge from a solar greehouse into bigbags. Unfortuna...

By Marshall, on 02/24/2016

I am looking particularly for their effectiveness combating arsenic....

By DOliver, on 02/24/2016

Do I have to install an air valve on a wastewater discharge network, knowing that just beyond the hi...

By soma2012, on 02/24/2016



Hello, Looking for a reliable and efficient solution to measure levels as part of continuous diagno...

By Florent, on 02/29/2016

Hi, We have a leak in a network section that cannot be isolated, and so I am considering using heli...

By Siocnarf, on 03/02/2016

I am repeatedly bothered by clogs caused by wet wipes on a combined sewer. The pumps are equipped wi...

By diego, on 03/02/2016

Hello, I treat industrial water in which there is lot of hydrogen sulfide (and sulfates depending o...

By Pierre_DEL, on 03/02/2016

Could you folks that manufacture Diaphragm pumps please provide your customers with pump curves show...

By Sterling M, on 03/03/2016

Hi, I've never had the opportunity to use one and I would like to know if there is a real differenc...

By Sam, on 03/06/2016

Quebec is implementing a wastewater operator certification system in 2017, while Ontario has been ce...

By joeduarte, on 03/06/2016


I'd like to know who among you are doing this type of cleaning internally because I'd like to set up...

By Amy, on 03/07/2016


Progressive removal of the old pipe and pulling in of replacement HDPE...

By Sam, on 03/08/2016


With Fluoride classified as a neurotoxin, along with arsenic, mercury and lead, should we be pushing...

By theH2Oman, on 03/09/2016

We are trying to find the source of a leak in a water tower. In consulting with various external ser...

By Sam, on 03/10/2016



Hello, I'd like to have your opinion on which indicators are recommended for monitoring the operati...

By Bilbo, on 03/14/2016


Are there any good disinfectant alternatives to Chloramine - a mix between chlorine and ammonia that...

By AndyR, on 03/19/2016

In France, the national water authority, ONEMA, is currently conducting a series of consultations in...

By Bidap, on 03/23/2016

Hello, We use a VWR MBT160 moisture analyser, catalogue number 611-2318, and we are having trouble...

By eauassainissement42, on 03/23/2016

We need to georeference our meters as part of a round of surveys. We would like the personnel doing...

By LeoMar, on 03/23/2016

Hello, For an exterior industrial-water basin, which technology is best suited for managing the aut...

By Bengm, on 03/23/2016


Recent diagnostics performed on our wastewater network allowed us to identify secondary drainage tan...

By EtLeMondeSeraMeilleur, on 03/23/2016


With the shock of sudden bad press, expensive forced infrastructure replacement and water resource d...

By vwebster, on 03/25/2016

I was reading an article that stated EPA still has not released the numbers after several months:htt...

By gussyboy, on 03/27/2016

My question is whether there is a way to unblock a discharge pipe knowing that whatever the blockage...

By rienkedelo, on 03/29/2016

Hello, We are running into a number of issues with hot tubs and spas in a public swimming facility....

By STEP, on 03/29/2016

Contents: sand, grease, fibrous material...

By Breizh'eau, on 03/29/2016

We are dealing with dramatic flow reduction and actual stoppage in PVC pipes fed by water with a hig...

By ChaT, on 03/29/2016

How do I set up pump switching between two units on a MultiRanger 100? What are the parameters? The...

By davidoff, on 03/29/2016

Does anyone have any feedback on tertiary filtration after clarification?...

By dolu, on 03/29/2016

Does anyone have a procedure for inerting a float-top anaerobic digester or best practices they coul...

By Jean_F, on 03/29/2016

In March, private companies in USA pledged $4 billion to help repair the aging infrastructure in lig...

By Morgan, on 04/01/2016

There was an article I found about a drug resistant bacteria, dubbed 'Nightmare Bacteria' that is ve...

By Morgan, on 04/01/2016



Our treatment facility has an aerated lagoon configuration with 3 consecutive basins. Recent regula...

By Luke, on 04/06/2016


Hi, We regularly treat fluoride for an industrial customer specializing in surface finishing. The c...

By nicolas_gerard, on 04/08/2016

Have you ever identified the presence of vinyl chloride monomer (VCM) in your drinking water network...

By Bidap, on 04/08/2016



Hello, a client asked me the following question: do you have any experience with growth of fungi and...

By CC71, on 04/18/2016

Hello, Silica is used to counter the effects of iron staining and turbidity in drinking water suppl...

By tet2lar, on 04/18/2016

What happens to the microconstituents in your sludge ? Where does it end-up?...

By GEE, on 04/18/2016


Hi, I work for a company in Canada (Quebec) that manufactures and applies corrosion inhibitors in o...

By Loïc-R, on 05/03/2017





Could you tell me the difference between a lift station and a pump station? And which one might be a...

By Nina D, on 05/25/2017

We are an old service district and it appears we only sell 2 out of every 3 gallons we pump up from...

By directorsnyder, on 04/26/2017

They all had about the same size and that weird black dot somewhere in the middle. We think it may b...

By Julien_Leduc, on 04/20/2017

We are having problems with our dosing pumps used for chlorination—they are consistently losing pr...

By miseneo74, on 04/17/2017

If there is a requirement for a wastewater treatment plant to measure BOD/COD values real time, is i...

By flusk111, on 03/12/2017

Hello , I have encountered a lot of 'dead' decanted sludge in an industrial activated sludge treatm...

By RG, on 04/17/2017


We are planning to replace drying beds with a flexible tank for storing sludge that has a dry solids...

By yannick 4363, on 04/06/2017

Hello I have a problem with an Aerzen air blower that I use to oxygenate the biological reactor. I...

By alexgabin, on 04/03/2017


Hello, Does anyone have a solution for motorizing a winch, because the process of raising agitators...

By Gilles Mulhouse, on 04/02/2017

Hi there, I would like to know if there is a connection between road salt and an increase in the co...

By Dayday, on 03/31/2017

Hello all, I would like to regenerate activated carbon, instead of destroying it, with the aim of o...

By Timal, on 03/27/2017

Hi, As part of the continuous monitoring of our network, we have equipped a measuring point with an...

By Maestro, on 03/27/2017


With Direct Potable Reuse (DPR), the treated water is distributed immediately upstream of a drinking...

By EOCPBCY, on 02/22/2017

We are having problems with sludge that has been treated with lime (dryness at 29%) and that does no...

By didine, on 03/27/2017

Poultry processing plant.Using DISSOLVED AIR FLOATATION/POLYMERS @ AROUND 1000 gpm....

By GDR, on 03/23/2017

Hi, I would like to get your advice about performing 10-year maintenance on a digester: are there a...

By gram, on 03/20/2017

We produce starch through cassava, and during production process there also produce a large amount w...

By Yiting Dai, on 04/25/2017

What kind of impact does aggressive water have on infrastructure components such as filters, concret...

By marwajdidi, on 04/20/2017

We have a fairly basic system (160 lots), but we are experiencing leakage. Shrinkage due to evaporat...

By Island Life, on 01/25/2017

Hi, Could you advise me about the best sensors to measure online suspended solids in abrasive efflu...

By YVART_Pascal, on 03/31/2017

The flow rate Q=10,000 m3/day, BOD = 400 mg/l, TSS= 350 mg/l, TN= 85 mg/l, TP=15 mg/l? The effluent...

By Rafi-B, on 03/19/2017

The facility in question has a dissolved air flotation system (FeCl3 and polymer injection) with a h...

By jesus, on 03/20/2017

Is there a general amount of P removed by biological/chemical treatment? Will type of coagulant make...

By Wesley, on 03/14/2017

Hi there, I have a drinking water plant that uses chlorine and is subject to regulatory standards,...

By polonium210, on 03/08/2017


Have a limit of 0.045 for copper in effluent, we are using magnesium hydroxide to treat and still do...

By Bernauer, on 03/09/2017

Hi I was wondering if there is anything my water company can do to minimize the sulphur smell in res...

By Valerie, on 03/01/2017


Hi All, I have a coastal project where the sea level at high tide rises just below ground level; per...

By Rickyrt, on 07/16/2018

On Linden Road in Del Valle, when the City waste water will be install?...

By Pjohn2018, on 07/23/2018

In reading several works by the same author on the treatment of farm effluent, I discovered the exi...

By L23, on 05/22/2018

I have a .250 MGD EXT. air reuse plant.  Running heavy approx. 5000-5500 MLSS operator is o...

By frankel, on 07/26/2018

Pristine water source with seasonal quality fluctuations.  Plan to upgrade capacity and res...

By FMacy, on 07/30/2018

Hi, I have decided to try my hand at improving my brewing water, and to that end have got some info...

By NoelBlakley, on 07/18/2018

Hi, I have a question regarding sulphide removal from wastewater effluents of tanneries. T...

By Mayo89, on 07/30/2018

To remove heavy metals from industrial waste water, chemical precipitation is used. The sludge gener...

By Neha, on 07/15/2018

Hello. I had a wastewater analysis from a Cocoa Beans sweatings, The COD is 11,000 ppm but the BOD...

By ruslam, on 07/29/2018

The effluent ph has dropped rapidly almost overnight to 2.9. What could have possibly caused this?...

By Paulielafa, on 07/18/2018

Will Acid hydrolysis reduce the COD. Is it an established method to reduce the COD.Are there any dra...

By Vijay, on 07/26/2018

The rice starch from the waste water has to be filtered before sending the waste water to STP.The pa...

By Vijay, on 07/22/2018

I supply water in an urban from a tank at 1250m elevation, and a pipe of 300mm from tank. The route...

By Mshitu, on 07/13/2018

How to clean the aeration in diffusion basines?...

By AFarsole, on 07/09/2018

Hi All Here in Europe we have typical design parameters/standard values for WWTP. Such as loads, hy...

By tamara, on 05/04/2017

We operate numerous water supply pump stations of varying sizes (wells, booster stations, pressure r...

By underpressure, on 02/22/2017

Looing for any municipality that does something to address sediment laden water from water main brea...

By ko, on 03/01/2017

The majority of coal tar will be removed with an abatement contractor but the residue is still left...

By Whippsapedia, on 03/10/2017


An industrial effluent that is coming from a nearby industry is rich in organic compunds and caustic...

By Laxmi_Narayanan_KS, on 03/09/2017

What are the pros and cons of composite material compared to stainless steel for access ladders in a...

By Tclaire, on 03/08/2017

Hello, In North America, calco-carbonic equilibrium is not mandatory for drinking water, and phosph...

By Loïc-R, on 03/08/2017


I am looking for the flocculant with low pH (3-4) that can be used in ecological products for pools...

By kmla, on 01/10/2017

Hellow, Could anyone  explain what happened to this case? and how to rescue it? inflow COD =5000m...

By Echo, on 03/07/2017

Hello, our treatment plant processes industrial effluent and is currently showing high COD levels at...

By Misseau, on 03/06/2017

The below is the list of effluent parameters from an industry, can this water be used to grow plants...

By Laxmi_Narayanan_KS, on 03/04/2017

We are thinking about changing flocculant for Ferric Chloride, but I have a hard time to find out wh...

By kmla, on 03/02/2017

Hi everyone I am a student and am preparing my final project. My topic is the comparative study of...

By serenaserena, on 03/02/2017



We operate a 25,650 PE/h treatment plant, low load (4.2 g/l), currently at 60% of its rated load, an...

By jean-luc, on 02/27/2017



Any thoughts about adding this contaminant to the extensive list of items we take on every day?...

By Halabi, on 02/24/2017


Hello, We are building a new treatment plant in the same location as the old one and have to ensure...

By b_dellali, on 02/13/2017


Have been having a problem with excessive foam in our SBR and setteability has gone from worst to ev...

By , on 08/06/2018

We have a 70 m3/h treatment plant located on an island and would like to produce chlorine on site vi...

By Coralie Benard, on 02/21/2017

Is this something I should be concerned about in my water system?...

By Thavill, on 02/19/2017


What do you see the pros and cons being if you do? Thanks....

By Tsao, on 02/17/2017

Hi, An aeration turbine has just broken down in one of my wastewater treatment plants (750 m3/day)....

By ian, on 02/16/2017


If I increase filter change by factor of 2 does it help?...

By Water Life, on 02/16/2017

The activated sludge treatment plant broke down for a period of several days. It has since started u...

By hocine, on 02/13/2017

I’m wondering if there are other ways this waste could be recycled into energy?...

By Calown, on 02/11/2017



I am in Ontario. In Reg 170/03, Schedule 13, I see the increase of sampling for Inorganic(13-2) and...

By southgate, on 03/13/2017

Turned on the water, got everything cooking, and what we get out of the tap is light blue. Any ideas...

By jamin, on 02/28/2017

Our department will use our Vactor unit during main or service line repair to remove contaminated so...

By Mack, on 02/22/2017

For a non profit veteran clinical retreat....

By iedhunter01@gmail_com, on 02/02/2017

Our WWTP recently was possibly hit by a toxic substance. At the time we were accepting septage, grey...

By coolarrow, on 02/09/2017






As the potential operator of a treatment plant with bioreactor and membrane filtration, I was wonder...

By rienkedelo, on 01/29/2017


Upon analysis of samples taken out from certain pipes, we detected the presence of VCM (vinyl chlo...

By shaman, on 03/26/2015

I have to install a Xylem wastewater pump. Could you tell me the good coupling to use?...

By adjones, on 03/27/2015



... or is it just a number?...

By totor, on 03/27/2015

...

By adjones, on 03/27/2015

...

By lapinagile, on 03/27/2015

Hello, I am planning to replace a borehole pump whose well is inside the water tower. My problem is...

By robby, on 03/27/2015

...

By adjones, on 03/27/2015




What kind of controller should I use?...

By shaman, on 03/27/2015




I am looking for a high-pressure system for automated cleaning of the clarifier effluent channels. Y...

By Eric H., on 04/15/2015

Hello, do you know a supplier who might have a micro gear motor (3.5 RPM) to distribute effluent thr...

By Ghost, on 04/16/2015


Hi, do you know of a supplier of devices for continuous monitoring of H2S levels for a wastewater sy...

By LM2286, on 04/20/2015



We have used several chemical products to boost physical cleaning (water jet). None of them has real...

By , on 05/06/2015


Hello, we protect all our facilities with anti-intrusion systems. What are the models and brands tha...

By gilles-b, on 05/20/2015

The floation tank collects the foam layer skimmed off the clarifier and the degassing well (between...

By Breizh'eau, on 05/27/2015

We currently use the ABB Aquamaster 3 and SIEMENS MAG8000 coupled with LS42 for sectorized drinking...

By mifrat, on 05/28/2015


Air-supply network of 5 km in 32mm-PVC with a few block valves, 6 compressed air ejector, a pressure...

By Breizh'eau, on 05/28/2015

Previously explored avenues: choice of polymer and dosage optimal use of thickener control of bel...

By Breizh'eau, on 05/28/2015

We have a security protocol for loading, unloading and handling chemicals.. We extended it to the lo...

By Breizh'eau, on 05/29/2015

MycET is a process marketed by SAUR which claims to isolate a category of mold thereby reducing slud...

By ODICI, on 06/01/2015

Hello, we are encountering problems with physicochemical removal of manganese from enclosed filters...

By leo, on 06/02/2015

Hello, Instead of drying beds, we have set up filtration tanks in our small WWTP and we are pleased...

By Vince, on 06/08/2015

Hi, our catchments are at altitudes above 1800 m; the stakes and fences we currently use have not b...

By Danos04, on 06/09/2015


As much for drinking water as wastewater (without industrial use or other specific applications)....

By Patrick_Té, on 06/18/2015

To avoid an electrical overload and volume surge at inflow to a WWTP, you should cut the pumps in th...

By miseneo74, on 06/18/2015

Hello. We are experiencing regular echo loss with an ultrasonic sensor, lift station with a lot of w...

By juan29, on 06/18/2015

Who out there can give me feedback on a polymer (sludge or physicochemical)? Difference in sludge hy...

By yoanb, on 06/18/2015

Hello FluksAqua community. Are there specific technologies (e.g., sacrificial anodes...) or some oth...

By pascalBG, on 06/19/2015

Hello, we would like to outfit some lift stations with a flow sensor for continuous monitoring. The...

By Siocnarf, on 06/19/2015

Hello, how can I calculate the overflow volume discharged by a lift station whose pipes are fitted w...

By JFG, on 06/19/2015

During a visual inspection, a CCTV camera fell into an asbestos cement network. The invert is gone;...

By Yomedia, on 06/19/2015


Hello, I’m looking for feedback on ozone treatment for wastewater (to break hard COD). We have a s...

By ELMLO, on 06/22/2015




Comparison to sand filters in terms of investment and operating costs? Any experience with it?...

By CL, on 07/03/2015

Hello community. Can you give me some input on size and implementation factors for a forced ventilat...

By Tonino, on 07/03/2015

We have set up a stainless steel boom that follows the curve of the structure. Now we have to insta...

By Espelette, on 07/06/2015


Types of energy sources: thermal, wind, solar, hydraulic…...

By Breizh'eau, on 07/21/2015

Bonjour,Our treatment plant is equipped with a 4800 m3 buried sludge storage tank with 7% dryness. I...

By David53, on 07/29/2015

The question speaks for itself: what methods do you use to calibrate hydrometers and how often? Cord...

By Alain, on 08/06/2015

We are replacing a honeycomb block on a Multiflo, I’m looking for feedback about the weight of the...

By Matthew, on 08/11/2015

Hello, the Hach Company lent us an HC CLF10 online chlorine analyzer for a few weeks. I’d like som...

By Aurelien_D, on 08/12/2015

Hello,We use a dedicated line to communicate between our production facility and the lead tank and h...

By S_ANNE, on 08/19/2015

Hi, for a few months now I have had problems with my centrifuge jamming after it has been operating...

By SCO, on 08/21/2015


Hello,We have Biofor filters in our WWTP which seems to be clogged throughout producing gaseous obst...

By Tonino, on 09/04/2015

Any supplier names?...

By gp70, on 09/10/2015

Hello, We are all trying to tackle the problem of wipes in the wastewater network which causes pum...

By pierre29, on 09/16/2015

Hello, can you give me some feedback about cleaning polymers? Despite testing a lot of products, I...

By Nico, on 09/16/2015

My problem: discharge distance greater than 3 km and irregular, several high and low points, compre...

By Firedog, on 09/17/2015

Hello, is treatment with chlorine for deferrization/iron removal consider breakpoint chlorination? A...

By Redoxx, on 09/23/2015

What is the best way to perform an operation without the risk of falling around a lift station whose...

By rienkedelo, on 09/23/2015




Is the product obtained actually good quality? We are experiencing difficulties in our operations a...

By ODICI, on 10/02/2015



Montreal (Canada) is under close media scrutiny and in the middle of political controversy (fueled b...

By Ouananiche, on 10/24/2015

When programming a Vistaplus, I got the following message: "incorrect recording device error 74." D...

By Sam, on 10/28/2015

Hello, We use a belt thickener for pre-treated industrial sludge. It operates 24hrs a day, 6 days...

By , on 10/30/2015




Hello What are the optimal settings for sludge drying in terms of requiring the smallest amount of...

By Sam, on 11/04/2015

We operate a pre-treatment (dissolved air flotation) unit for an agri-food plant that specializes in...

By , on 11/05/2015

Hi, What is the dryness of the sludge at press discharge? Did you encounter any problems operating...

By Amy, on 11/06/2015

I would like to test for Nitrates in my water supply on my DR 900. What procedure should I use? it l...

By Sam, on 11/09/2015

I stumbled upon this article about how the two-mile stretch of Brooklyn’s Gowanus Canal—home to...

By Amy, on 11/09/2015

Hi, Rotary drum: manufacturer, features, operation? What results have you had: quantity of reagent...

By Breizh'eau, on 11/12/2015

California becomes latest state to ban plastic microbeads used in exfoliators and other products, at...

By Amy, on 11/12/2015

Seepex pump and Andritz centrifuge...

By Breizh'eau, on 11/13/2015

We have been vacuuming out a plastic tank (10 m3, HD-polyethylene) to remove food-grade grease, a pr...

By Marshall, on 11/16/2015


What type of injector do you use to add chlorine (bleach) to a pressurized pipe?...

By gilles-b, on 11/24/2015

Has anyone installed an IE4 motor (super premium efficiency standard) with a variable-frequency driv...

By Fluid, on 11/25/2015


I am looking for a seal or other protection between welded tapping on a steel pipe and a connection....

By mjlf, on 11/26/2015


Today is GivingTuesday, considered to be the opening day of the giving season, just as we were remin...

By Ouananiche, on 12/01/2015


Hello - What intrusion detection systems approved for remote management do you use for wells, wa...

By jo, on 12/07/2015

The Vermont Air National Guard has installed an aerobic biodigestor that can turn 180 kg of leftover...

By Amy, on 12/07/2015




I have a rv park one of the guest said the sewer is overflowing over there is it suppose to if we ha...

By , on 02/19/2018

Water is spitting air into the well water system . We put more air into the blaster tank up to 25 lb...

By , on 02/05/2018


What health problems do people developed from well water...

By , on 03/01/2018

How to remove calcium in water?...

By , on 12/11/2017




I rent and can't afford a water softener. Any ideas?...

By LR, on 11/30/2017


Water purity may have been affected by nearby pig farms...

By Surigao, on 11/19/2017

...

By Sonnyv, on 12/06/2017

What bioreactor is specifically used to create anoxic conditions for denitrification in the tertiary...

By Ninaocox, on 11/21/2017


Influent to a wastewater treatment plant bioreactor averages 1.5 MGD with 140 mg/1 BOD and 160 mg/1...

By MARY, on 10/17/2017

Can ds be increased in a gravity sludge holding tank by installing a stirrer...

By Brig, on 10/30/2017

I'm to build a weir wall, placed in front of the outlet pipe,  in a wastewater treatment pond that...

By , on 10/16/2017


I know the formula for converting ppm to gpg for hardness, but I know dependent on the  material th...

By Jackson, on 10/19/2017


Hello, I am looking to get a site survey done for a house I'm thinking of buying. House has septic...

By JoeClark, on 08/04/2017

Calibrating a PH meter....

By Buddy, on 07/30/2017

We need to refine the filter media. we used quartz sand: 1-2 mm (25 tons); 4-6 mm (15 tons) and 15-2...

By almira, on 07/09/2018

...

By , on 10/23/2017

I am bit confused. I am calculating the CO2 sequestration potential of using CO2 as a neutralizing a...

By tamara, on 08/03/2017

Very soon we will be implementing EVOQUA's chlorine dioxide generation system (reagents: HCl 30% + c...

By Epistylis, on 06/19/2017


Who are the best USA mechanical engineering companies able to respond to a RFP to finesse designs an...

By MaryEllenElizabethHart, on 02/14/2017


Hello everyone, This is my first forum topic. So, apologies in advance if my question falls outside...

By Tytew, on 01/29/2017

Hello, As part of a continuous wastewater diagnostic system, what would you recommend for measuring...

By Nicolas_54110, on 01/18/2017

Best wishes for 2017! We are encountering problems with a lime dosing screw feeder post centrifuge....

By Tclaire, on 01/27/2017

Do you have a cost-effective solution to keep chloride levels below 10 ppm in water (obtained initia...

By Seef, on 01/26/2017

Could infrastructure issues lead to other concerns as well?...

By Arink, on 01/24/2017


So I conducted a settled solids test got a good result and then walked away for an hour or so. Usual...

By Joe Scratch, on 01/08/2017


Newer systems are starting to show leaks in relatively new PVC distribution systems. I would like to...

By Gtarvinni, on 12/30/2016

How much alkalinity is typically needed for coagulation with Alum and SternPAC?...

By Joe Scratch, on 01/20/2017

I know I could look that up online, but I thought I’d ask the experts about what they’re talking...

By Enortak, on 01/19/2017


...

By Bigdog, on 01/13/2017

Hello, I'm looking for feeback on HUBER’s RakeMax bar screens and how they handle pebbles and sma...

By Tonino, on 03/23/2016

Can you tell me whether molecularly enhanced PVCO piping is permeable to hydrocarbons leaching in fr...

By Nico3483, on 12/23/2016

I need to measure the flow rate of my pumps to determine wear and tear and plan refurbishments. The...

By whater, on 07/11/2018

I am looking for anyone with direct experience of chromium-6 monitoring and analysis for an industri...

By Fredo90, on 07/12/2018

How do I unblock a 1000-mm cement pipe used for agricultural irrigation that has been overrun by roo...

By gilles30, on 08/24/2017

We are in a Plating shop...

By Coolchris, on 07/14/2017

I'm looking for some insight into a phenomenon we are experiencing in our plant. The plant processes...

By edv, on 01/17/2017

In the near future I will begin injecting sodium aluminate to treat phosphorus in an aeration tank a...

By francois.soubranne, on 08/16/2017

Hi, I am looking for the optimal retention load in chemical manganese removal (oxidation by KMnO4)....

By tet2lar, on 08/16/2017

I am currently working in a separate sewer treatment facility where a significant inflow of water is...

By JulieSEGI, on 08/07/2017

Does anyone have any feedback on these? I am looking for info on longevity, reliability, what kind...

By Ouab, on 07/31/2017

Permethrin is an insecticide being used widely for killing or repelling ticks and mosquitos. If some...

By stillkickin101, on 07/31/2017

Hello, I am a student doing an internship in organization and have been tasked with producing a rep...

By TA, on 07/31/2017

I have owned a 30-PE treatment plant manufactured by ISEA for 10 years. At the moment we are about 3...

By yvmo53, on 07/31/2017

We normally turn all our valves to make sure they are not seized and operate reasonably. Some say we...

By HeavySevy, on 06/29/2017

We have a recurring problem with unauthorized use of our fire hydrants. We are looking for a system...

By Sarah, on 07/18/2017

Hello, I would like to know how the presence of rust on a horizontal multicellular pump (on pump cas...

By Lmaros, on 07/17/2017

I would like to know how to lower ammoniacal nitrogen in a 2-cell aerated pond....

By Bonnie, on 07/16/2018

Hello, I would like to know when the presence of bacteria affects the breakpoint chlorination curve...

By GRAVIWATER2, on 08/31/2017

Hi, I just started at my new water treatment plant and I've come across something I can't explain an...

By Novaangle18, on 08/29/2017

Does any one have any feedback on the following aspects of the product? - monitoring points - afte...

By colive, on 08/24/2017


Hello! I've really been racking my brain around this. I'm currently working at a water treatment fac...

By Spaniard, on 07/12/2017

Hello, I would like to know the disadvantages of a steel impeller on a multicellular drinking-water...

By Lmaros, on 07/18/2017

I need to treat water with SDI 6.8 , COD 400 ppm and BOD 200 ppm. 90% of COD & BODis soluble Re...

By Furqan Kausar Haider, on 07/09/2017

COD entering aeration basins = 600-700 mg/L BOD entering aeration basins = 300-350 mg/L Volume of ae...

By Lavica, on 07/10/2017


A colleague on the forum had suggested mastic to dampen vibration. But are there any other ideas sh...

By Breizh'eau, on 02/18/2016


Hi, I recently found out that I could clean my diffusers by injecting acid. But I am unsure as to w...

By bonjour, on 02/07/2017

Our municipality is potentially switching to an SBR from aerated lagoons. We're doing this in order...

By pooguru, on 03/23/2017

For tertiary treatment at outlet of a WWTP, what is best: UV or ozone disinfection? What is the TSS...

By Nina D, on 05/26/2017

Hi, I am wondering about the effectiveness, advantages, and disadvantages of different leak detecti...

By Patate, on 06/20/2017


Hello everyone, Are any of you using a JWCE Muffin Monster sewage grinder in-channel on a pump stat...

By YVART_Pascal, on 05/05/2016

Water, sewer and stormwater utility professionals are invited to share your needs and preferences re...

By jeanmilan, on 06/23/2017

Can you tell me how to determine the width of a collection channel that conveys treated water discha...

By 1dudu9, on 06/20/2017

Looking for information from anyone who has used No-Des for water main flushing. How effective was i...

By underpressure, on 06/16/2017

We are looking into chlorine dioxide for a water treatment plant and other facilities and would welc...

By Patrick47, on 06/09/2016

Dear Friends, Can anyone have operational experience of textile based ETP and wastewater recycling...

By Kashif_Shabbir, on 06/14/2017

We have an old system, we have non revenue water, and we have not started district metering. I'd lik...

By Ouananiche, on 07/11/2016

In our plant we are trying to implement self-monitoring of an overflow pipe equipped with a swing ch...

By Leah, on 07/18/2018




Caustic Soda %0% how do you convert DT to MT...

By mad, on 06/02/2017



Hello everyone: I have a compressor that is on its last legs (it's more than 40 years old), and I a...

By Yakoub, on 05/30/2017


We are merging together our teams of drinking water and wastewater operators. To that end, we're wo...

By BlueDrop, on 05/15/2017

We are setting up district metering in our network and are looking for a simple, visual way to ident...

By Флориан, on 05/15/2017

I got a 24-hour continuous running phone call...

By SuttChan75, on 05/09/2017

I always use sanitation chemical in the black water tank after flushing and emptying. Of course I em...

By MWB, on 05/05/2017

I am wondering what others are finding for H2S readings in their municipal pressurized sewer step sy...

By SewerB, on 05/09/2017

Hello, I would like to know which nutrients I should use to maintain living anaerobic sludge in a bi...

By mistoff, on 05/05/2017

Hi, I'm a petroleum engineer considering making a move over to hydrology and I'd like to read some...

By ResGuy, on 04/21/2016

How do you calculate the flow rate of lime sludge as mixer output in order to size a cake pump that...

By titi3103, on 04/26/2016

I am looking for info on managing the job site from excavation and installation of pipes to final ba...

By kienou, on 04/26/2016

Hello, during fire hydrant flow tests by firefighters, we often encounter problems with brown or rus...

By EtLeMondeSeraMeilleur, on 04/26/2016

...

By Briann, on 04/26/2016



Hello everyone, Are there any special precautions to be taken when installing a variable speed driv...

By LR06, on 05/05/2016

Hello, We've encountered a problem with refractory COD in our treatment plant discharge (i.e., orga...

By Ghost, on 05/06/2016

I am trying to ventilate small confined spaces (< 20 m3) without using the high and low, chimney-...

By Marshall, on 05/06/2016

Hello, are the equatations by US EPA and Pomeroy also aplicable for box-type-sections and for bigge...

By Hoax, on 05/09/2016

Despite emptying the grease interceptor on a regular basis, foul odors are seeping out of our sinks....

By Lechamoysien, on 05/10/2016

Hello, We have just taken delivery of a new wastewater treatment plant with sludge dewatering via c...

By titi3103, on 05/13/2016

Using vacuum trucks to clean out lift stations is certainly effective, but it's expensive and not pa...

By rienkedelo, on 05/13/2016

Hello, As part of our continuing efforts to ensure optimal efficiency in our potable water supply a...

By Cams, on 05/16/2016

Hello, We have an industrial customer that manufactures cellulose fibers. For the purposes of treat...

By TDENTZ, on 05/25/2016

Hello, Very soon we will be implementing EVOQUA's chlorine dioxide generation system (reagents: HCl...

By Marianne, on 05/25/2016

Hello, We are looking at potentially installing a self-cleaning intake screen in a river to prevent...

By Vince, on 05/25/2016

Hi Do you know what regulations apply to injecting chlorine in drinking-water systems? I am trying...

By yann, on 06/01/2016

I am looking for a way to calculate production for a treatment plant with a high-load activated slud...

By mdaoues, on 06/02/2016

Hello, I am interested in using carbon dioxide in the treatment of drinking water (pH control, remi...

By Marine, on 06/03/2016

Hello Monitoring discharges into the natural environment is becoming increasingly regulated, includ...

By Bilbo, on 06/05/2016

...

By Steven_P, on 06/08/2016

Do you think that Senate Bill 88 (Emergency Regulation for Measuring and Reporting the Diversion of...

By Bb8, on 06/10/2016

Hi, We would like to be able to measure the volume of sludge pumped out of our flexible tanks. We w...

By patrick, on 06/11/2016



Have you ever had to use these guidelines and how was your experience with them?...

By , on 06/15/2016

We have a relatively deep lift station that receives combined sewage effluent, including all kinds o...

By Tom01, on 06/16/2016

We collect laundry greywater in 3 big rain barrels whose drainage holes sit at least 6 or 9 inches f...

By arl, on 06/17/2016

...

By mwood045, on 06/17/2016


(Influent-Effluent)*100/Effluent? (Effluent-Influent)*100/Effluent? (Influent-Effluent)*100/Influe...

By Ann19, on 06/29/2016

Hello, The operating procedures list tools, PPE, mobile safety barriers, and other safety signage f...

By Breizh'eau, on 06/30/2016

Hello, I am looking for information on the source of anaerobic sulfate-reducing bacteria in drinking...

By franck.soulier, on 07/04/2016

Hello, We have some rapidly aging drinking-water pipes, what's the best way to rehabilitate them? W...

By gram, on 07/06/2016



5 uses for my coffee maker and I get a black deposit of BORE, acetic acid dissolves the deposit , bu...

By Jo, on 07/11/2016



I would like to have some explanation as to why this might be....

By soma2012, on 07/13/2016

I would like to know how to inject a polymer according to the volumetric flow rates indicated in the...

By alexis, on 07/14/2016





Rinse water from enamel glazing contains oil. What is the best way to get rid of the oil so that the...

By Shinesh@67, on 07/18/2016


Hello, I am looking for information on conducting sampling of H2S and sulfides in the liquid phase....

By loic_Alves, on 07/20/2016



What’s the best way to clean HDPE pipe loaded with very fatty wastewater effluent? We are dealing...

By Ard08, on 07/23/2016

In order to compare flow meters, I wanted to set up a bubbler in tandem with a venturi flume at the...

By nicolas_gerard, on 07/25/2016

Our sludge consistently produces levels of copper that render it unacceptable for spreading purposes...

By Diwan, on 07/26/2016


Hello, I am looking into incinerating sludge processed with powdered activated carbon (PAC). Does a...

By Vince, on 07/28/2016


Hello, I am looking for a way to determine how long it takes effluent from different points on a ne...

By EtLeMondeSeraMeilleur, on 08/01/2016




...

By Antall., on 08/06/2016


We've all heard about Flint. My community is pretty rural, so many people tend to use private wells...

By Equed, on 08/10/2016

We're receiving a lot of feedback about our treatment system. Specifically about how we can rehabili...

By Kastner, on 08/11/2016

We're having issues with algae growth and what we're trying just isn't working. Thanks....

By Theire, on 08/13/2016

Our biggest struggle in doing so would probably be controlling phosphorus levels. Any thoughts about...

By edmdiffusion, on 08/13/2016

Our local authorities still “unofficially” encourage flushing for disposal of them and we're run...

By Unwho9, on 08/14/2016

Can you point us to any specific success stories that could help us put together a more effective fu...

By Youldame, on 08/16/2016

No matter how much we fix it, the blasted thing always seems to spring a leak and cost us time.Any t...

By WirelessFin, on 08/17/2016

Hello, a local community is planning to build a tank measuring 20 m in diameter and 15 m in depth. W...

By N_COUESNON_UO_MARNE_OUEST, on 08/17/2016

Has anyone tried the filters they talked about?...

By Diederich, on 08/20/2016

The initial cost was $6 million, but that has ballooned into $14 million. We put a tax referendum ou...

By Neumann, on 08/20/2016

I’m just trying to get a feel of what communities are looking at for their reuse patterns....

By CHall, on 08/21/2016


Except for about 6 weeks in July and August.This means there is a lot of water phosphorus we deal wi...

By Yeterfer, on 08/24/2016



What does everyone recommend when it comes to dealing with this issue?...

By Flowers, on 08/26/2016

We are a demolition company under contract to remove plastic filter media from Anoxic Tanks. When we...

By Cutter5941, on 08/27/2016

...

By Abrahamsen, on 08/27/2016

Do you have any good ways to communicate the lead removal process that have worked locally?...

By Gecko, on 08/28/2016

Hi, Every summer we get complaints about a surge of cockroaches in the tourist areas of our old tow...

By Nicolas Champoussin, on 08/31/2016

We have a Andritz D4LL centrifuge used for dewatering wastewater sludge. Recently it has developed...

By N2, on 08/31/2016

Our levels are increasing. What are the standard effluent indicators?...

By BrunoM, on 09/06/2016

Hello, I'd like set up district metering on our network. I'm looking for reliable ways to assess th...

By SeineOiseMarne, on 09/07/2016

Hello, I'm looking for methods used to monitor water table levels: - How do you monitor levels gen...

By Bilbo, on 09/07/2016



Sludge from our WWTP is contaminated with mercury. The concentration is just below the limit allowab...

By celunch, on 09/12/2016

We measure the presence of carbon monoxide (120 ppm) at inflow of a wet scrubber. The tower mainly p...

By Céline, on 09/13/2016

We have to commission a potable water pipe that was built more than ten years ago. An inspection cam...

By ofl@ylb.ch, on 09/14/2016

What do you know about it? I get the impression it is more present with higher external temperatures...

By Thibault, on 09/15/2016

We are processing about one truckload per day....

By colive, on 09/15/2016

Hello. Is there a formula to calculate precisely how much ferric chloride to inject based on the fe...

By Jay, on 09/19/2016



I have heard the City of Laguna Beach dumps its sewage into the ocean, unlike other coastal cities....

By palikea, on 09/20/2016

How can we remove the gas bubble and prevent from reoccurring in the future without radical surgery...

By redmud, on 09/20/2016

Would you be interested in a new disinfectant; NSF61 Certified and EPA registered that provided you...

By wtp5ck, on 12/27/2016

We provide potable water to rural residents--some of our wells draw from an aquifer that possesses e...

By Aguanina, on 12/27/2016


I'm trying to set up a strap on Doppler to measure digested sludge flow. I'm having trouble working...

By kbnikki, on 12/28/2016

We are located in California, building is in agricultural/commercial zoning, sitting on an acre of 1...

By Renegade, on 12/28/2016


PVC water line detection in sandy, loose soils....

By jayacga, on 12/30/2016

Old sluice gates will not seal so i can not isolate stabilazation ponds....

By rocky2500, on 12/30/2016

We have a approved plan but having trouble with team activity....

By scotty, on 12/30/2016


Any successes with A/O Operations of Aerobic Digesters at domestic WWTPs?...

By Chuck, on 01/01/2017

Could this be the water level is dropping below the submersible pump, problem with the bladder tank,...

By toomuchair, on 01/01/2017



What certification do you need to maintain the piping and flare gas systems including digesters in O...

By Scot, on 01/10/2017

We've had our system up and running for 25 years.....

By The Cat, on 01/17/2017




Wondering if anyone has tried it? Or what your thoughts might be about this idea?...

By redpenn, on 01/20/2017

Hello! If anyone here would like to participate in a market research interview being conducted for t...

By Maximilien, on 01/25/2017

Hello I have a plant whose aerator gave out. It took us four days to change it and install a new one...

By Fabro, on 01/30/2017

I am the owner of two discharge pipes in a wetland area that cannot be inspected at surface level. W...

By nico02, on 01/30/2017

Hi Everyone, I am looking for a device to measure turbidity so I can determine the precise amount o...

By Odevie, on 01/31/2017


Hello, I'm in charge of putting together a database that will allow us to identify all new pipes an...

By STP, on 02/08/2017

Oxidation ditch, .450 MGD design rate, .220 MGD flow. I have dosed the RAS with sodium hypochlorite...

By cdaniels, on 02/10/2017






That used wastewater solids. Is there really anything dangerous about that process?...

By Garde-, on 02/23/2017


The wastewater in my flow equalization is good, but when it moves to my aeration tank it is going se...

By LM, on 03/03/2017


I have my Cwea test in 2 months and am having a hard time finding study material on line. Does anyon...

By Флориан, on 04/04/2017

I have a shallow well of about 2.5m in our home with many settlements arround in a swampy area. Is i...

By Gideon, on 04/26/2017

Good afternoon, Is a retention basin the same thing as a storm overflow? What's the difference? T...

By kk, on 05/05/2017

Currently all our sewer lift station wet wells are concrete, we are designing a new station and a fi...

By SewerB, on 05/17/2017




A 2% sodium hydroxide solution including a food grade biocide is pumped through piping, tanks, heat...

By Bingo, on 06/09/2017



Hello to you all, I would like to know the type of vehicle and what tools and equipment are required...

By Gryphus, on 06/20/2017

I have a Canadian-registered charity called Together Education Works that assists 3 schools in Guate...

By Hal, on 06/29/2017

My query is about rehabilitating an aerator and sand filters in a drinking water treatment plant. I...

By Cellou_idiatou, on 07/06/2017

We have vats of bleach in which, during periods of high summer temperatures, bubbles form and cause...

By olivier31, on 07/06/2017

I'd like to know what treatment system is recommended to eliminate yeast in water with a view to ren...

By elletse29, on 07/06/2017

We are building a new membrane plant, upgrading from a activated sludge plant. We are going to be c...

By dmcdermid, on 07/11/2017

...

By Rumskull, on 07/11/2017

Are gray water lines from the dran fild has clear water coming back up the line...

By Chris_Caffey, on 07/13/2017

Hello, I am currently working in an industrial wastewater treatment plant where we use ferric chlor...

By wawiya, on 07/18/2017

Has anyone ever had a problem with fermentation developing in a sludge silo? Ours has started to “...

By kev, on 07/18/2017

Please any one can list down the procedure of sand replacement of Multimedia filter....

By Kashif_Shabbir, on 07/21/2017

Little question maybe you know an answer. At a project we may start we have wells that are slightly...

By Johannes2118, on 07/28/2017

I am wondering if you have any info on injecting peroxide to reduce sulfur concentrations in industr...

By Asma, on 07/31/2017

Do you know of any continuous corrosion monitoring systems (similar to the Cosaco line of products)...

By pascalBG, on 08/07/2017

Does anyone have any experience with sand or other media that gets ACS approval and could be used to...

By Espelette, on 08/07/2017

We are looking for advice on this pump which, according to the manufacturer, will save us having to...

By js2009, on 08/16/2017

Does anyone use predictive formulas to determine the distribution of mono-, di- and trichloramine ac...

By Robert_D, on 08/16/2017

How do I remove duckweed from an aeration basin?...

By DBeaux, on 08/18/2017

We are programming operations at a drinking-water plant and want to optimize its tank in order to re...

By lamjer65, on 08/24/2017

The process uses activated alumina for filtration along with the injection and handling of Sodium Hy...

By wagdan, on 08/24/2017


I have an sc200 connected to a PLC. I want to control the O2 content with a minimum and a maximum th...

By Fred281, on 09/01/2017

Do you have any positive feedback to give on this type of equipment: reliability of measurements, ca...

By rienkedelo, on 09/06/2017

Caustic soda injection has almost completely clogged a DN200 discharge pipe because of crystallized...

By Hepno, on 09/06/2017

What do I need to think about in choosing between flotation and settling? I assume it depends on the...

By Флориан, on 09/06/2017

Hey Y’all!FluksAqua is organizing a contest for the Community in collaboration with the...

By Nadia Koukoui, on 09/13/2017

We continue having fatberg creation in our sewers.We have a program in place for restaurants,...

By Ouananiche, on 09/18/2017

I would like to have your opinion on the feasibility of a "man-made" lagoon in which water would be...

By Folschy, on 09/06/2017

I have an oil separator has to install at a depth of 1 m 60. I weighted down the unit with a reinfo...

By pops83200, on 09/21/2017

I am looking for feedback on the use of potassium permanganate in the pre-oxidation phase of a drin...

By Steph22300, on 09/21/2017

Self-monitoring of small WWTP: aerated basins? What system do you recommend to measure the flow ent...

By rienkedelo, on 09/21/2017

Wastewater1.5 MGD WWTP after storm Mittchel we have water fleas. What are some ways to kill them. Ou...

By Tommy, on 10/24/2016


What is your preferred method for Chromium 6 removal? Does anyone have experience with weak base...

By Jean_F, on 02/18/2016


Hello, when my PC was replaced, it came with a USB-powered external modem (previously the modem had...

By Ben, on 04/10/2015

Do you know if drones are being used in our industry for water production and supply, maintenance of...

By Breizh'eau, on 03/17/2016


What flocculants do you use? Do you know of any proven alternatives that can replace aluminum salts?...

By Bidap, on 04/21/2016

Has anyone completed removal and replacing of filter material (sand and gravel) or similar work rece...

By Sam, on 12/21/2015

Hello, we are experiencing sludge bulking in the clarifiers of some smaller wastewater plants (activ...

By FABIEN_MICHON, on 05/10/2016


Hello, I would like to know the differences between bronze and cast iron impellers for drinking wate...

By MALIA, on 07/27/2015

We inject chlorine prior to the flocculator tank and measure a grab residual from the tank to gauge...

By EGB, on 04/08/2016

What do I need to know to make sure I order the right product?...

By pat95, on 01/17/2017


How many straight runs do I need ahead of my valve with an insertion flow meter?...

By Robert_D, on 10/04/2017

Is it okay to install the orifice plate against the outlet of a control valve?...

By Robert_D, on 10/04/2017

Hi, I'm fairly new to the waste water industry and was hoping to get some input on one of the anomal...

By Novaangle18, on 10/04/2017

I know that at least one septic system was underwater on Twin Lake East-Lake West after Hurricane Ir...

By , on 09/29/2017

We live in Texas, we were under boil alert for 10 days, we had sewage water backed up in pool, yard...

By , on 09/22/2017

Are there any known effects of waterless urinals on sewage treatment plant up to 500 people on aerob...

By Burningham, on 09/21/2017

I have a tank of water at 5 uS conductivity. The tank is 16,000 gals. How do I calculate the volume...

By Pakman, on 09/27/2017

What are the six govening procedures one must implement to operate an anaerobic digester system...

By , on 09/23/2017

But there is a lot of concern about pollution. Has anyone had to deal with something similar? Did yo...

By Whommet, on 09/20/2016

And how much wastewater do you believe each person generates each day?...

By Litating, on 09/21/2016




I’d like to gather a consensus of what everyone is doing so I can make comparisons to our local me...

By Convertibles, on 09/23/2016






...

By Felix, on 09/26/2016

...

By technician, on 09/26/2016

Hello, What's the best rehabilitation technique for wastewater manholes and concrete water-treatmen...

By jbo, on 09/29/2016

Despite a low manganese content in our water, deposits have formed in the pipes. Can anyone enlighte...

By Jayouk, on 09/30/2016

Hello, We need to replace the access covers in our drinking water production plant. Has anyone don...

By criri, on 10/03/2016

Hello everybody, As part of an H2S treatment process, do you have any specific recommendations abou...

By Syl2L, on 10/04/2016




We have a WWTP that serves 10,000 PE, and we now have a large amount of fibrous/filamentary matter i...

By Marc_dengremont, on 10/12/2016

Hi I need to install a continious sludge blanket level measurement in a Clarifier tank . Does anyon...

By maxymlachance, on 10/14/2016

Hello everybody, Could you please tell what air change rates you use with a fixed position exhaust...

By YVART_Pascal, on 10/21/2016

Hello, I want to know if it's okay to measure the cos phi (power factor) of a motor upstream of the...

By LR06, on 10/21/2016

We’re looking for new ideas to reduce operating costs and be more effective with compliance. Just...

By Lauted, on 10/21/2016

Is meg-meter flow meter, a good choice for sludge flow measurement? what about ultrasonic one? my qu...

By mehrnaz_s, on 10/21/2016


Any thoughts about reducing the amount being disposed?...

By Tindin, on 10/25/2016

I have a small package plant that I operate and the digester has a lot of scum on the top of my tank...

By Tom Bertrand, on 10/26/2016

Hello, The service life is indicated by the manufacturer (number of hours). UV rays are produced b...

By Breizh'eau, on 10/26/2016


Hi, The system almost 10 yrs old, my question is the Tank need to be flushed or replaced? and how l...

By Patrick Seo, on 10/31/2016




I need some help. Right now my company is developing a small (approx. 25 m3/h) & maintenance-fre...

By Frida_WalleniusWater, on 11/02/2016



Wondering if anyone had some advice from their own experiences they could offer....

By Tia, on 11/08/2016

Hello, We have excess foam in our aeration tank that causes a significant overflow when the blowers...

By sodeval, on 11/09/2016

Hello, We have refurbished a drinking water network that suffers from significant yellow water prob...

By Guillaume_GRIMARDIA, on 11/09/2016




Have there been any challenges you’ve encountered with your efforts?...

By Glearand, on 11/12/2016

...

By Kpoll, on 11/15/2016

Hello, We are in the process of cleaning out an aeration tank. The invert surface is 2500 m2. The t...

By MSO, on 11/15/2016

I don't trust the results I get from my color tests when using spectrometers, specifically the Hach...

By Joe Scratch, on 11/15/2016

In what is being treated. Do you think this could be an issue with our anaerobic digester?...

By Humphreys, on 11/16/2016


Total flow for plant in October is 23,041,000, average monthly flow is .743. Average yearly is .785....

By sj, on 11/21/2016

About once per week, I catch someone dumping their grey water into a catch basin. What programs (if...

By Twoulonat, on 11/21/2016

Aeration is performed using flow booster and diffusers....

By supernova1, on 11/21/2016


I am trying to determine why our sludge is rising. The sludge volume index is correct at 120 and so...

By Utilites, on 11/23/2016


Hello, Do you have any technical info or specs regarding the kind of sand that is used in a gravel...

By YVART_Pascal, on 11/26/2016

The local press just brought up this study from earlier this year from USF about finding vancomycin-...

By Cartwright, on 11/26/2016

But I’m wondering if anyone has had any experience in removing surprise levels of magnesium?...

By Ancesse, on 11/26/2016

How do I remove a grey water tank from a 1996 alpha 34 RLL. I have. I clue if it's from bottom or to...

By Low, on 11/26/2016

I do not know of any Municipal plants in Ontario that do Water Softening. Are there any?...

By Joe Scratch, on 11/27/2016


Ductile vs. Thick wall plastic ?...

By poteat2, on 11/28/2016


Do you know of other bleaches available besides Stain Solver?...

By nancyelizabethsaltsman, on 11/30/2016

In the hopes of avoiding having to dispose of hazardous products after cleaning our installations, I...

By colive, on 12/01/2016

Hello, I'm looking for the concentration of sulfur in wastewater that would start to have an impact...

By Redoxx, on 12/03/2016

I'm trying to remember why some water plants can't use their sludge for agricultural purposes. Is i...

By Joe Scratch, on 12/04/2016

I am using Hydrogen Peroxide for Advanced Oxidation water treatment. So far, I haven't found any rel...

By clugovega, on 12/05/2016

Hello, We are experiencing recurrent high levels of nickel in our drinking water treatment plant, h...

By , on 12/05/2016

It is from a diffuser. It is located in the wastewater of a chicken farm. I tried googli...

By Harpoon, on 12/05/2016

We are going to be replacing our PSI filters on 2 skids at our 12 year plant looking for info on wha...

By watershop, on 12/06/2016

I have a sales rep that wants to meet to discuss the benefits of this product. I've seen magnetic pr...

By slove928, on 12/07/2016

What's a simple system we can install to purge a small-diameter connection on a regular basis and av...

By Marshall, on 12/08/2016

Hello everyone, Following a low-water situation, we had to install an emergency aerial pipe to feed...

By cd2016, on 12/09/2016

Anyone ever have success with using Modafinil for dealing with shift work? Was it safe or did it fe...

By Joe Scratch, on 12/09/2016

Hi We have a backup well that contains 125 μg / l of manganese. Its production is limited (190 m³...

By Roland, on 12/09/2016


We use Biodagene filtration media (expanded shale ore) in a denitrification unit, and at output we a...

By nantais, on 12/12/2016

Hello, We are in the process of cleaning out an aeration tank. The invert surface is 2500 m2. The t...

By MSO, on 12/13/2016

Looking for a better anionic polymer to use as filter aid in upflow clarifier direct filtration pota...

By parkville1, on 12/13/2016

Hello, As part of a campaign to measure flow rates in our wastewater network, we installed a portab...

By Florent, on 12/14/2016


Hello everyone, I am looking for the best equipment to perform drawdown testing. The tests are done...

By M.G, on 12/16/2016

Hello, During installation of a lift station, how do we ensure proper operation of check valves and...

By Freefroi, on 12/18/2016

I have a small plant no more than 6000 gpd and we are a nursing home .Since my question I have fou...

By bk, on 12/19/2016

I want to limit my flow from 10 l/s or 36 m3/h to pressure of about 1.5 bars? Thanks...

By nicolas girard, on 12/19/2016


We have ruled out filamentous bacteria or an oil and grease problem. I am waiting on lab results for...

By IFM, on 12/20/2016

Is there a way to run smaller pipe thru larger one if there are 45 degree turns and you cant get to...

By trafking, on 12/20/2016


I would also like to install a wireless logger system, can I do this affordably for only 4 meters?...

By Jaredvanrooyen, on 12/21/2016

Anyone have a low cost method of avoiding inversion in a 100,000 gal storage tank until funds can be...

By islandwater, on 12/21/2016

We are looking at one that is specially designed for abrasive liquids and a rinse phase....

By dht34, on 12/22/2016

Hello, What are the best practices for hydrant testing and maintenance for small systems in cold re...

By Robert_D, on 12/22/2016

How to lower the pressure in a zone of my distribution system if there are two valves feeding the sa...

By NKFA, on 12/22/2016


Hello, We are looking into purchasing a new correlator to detect leaks on PVC or PE pipes. We perfo...

By Roland, on 12/23/2016

The issue of water fluoridation is a hot topic again. The city of Trois-Rivières in Quebec announce...

By grajotte, on 12/26/2016

Hello, I am having trouble pinpointing the exact source of COD pollution on an industrial site that...

By bali, on 12/27/2016

On my BOD analysis I found that the 8x dilution and 16x dilution falls within the acceptable range;...

By gunalan, on 03/22/2018


Standard Methods 23 says you may use plastic bottles for BODs. The 22 edition says it “prefe...

By DR, on 03/27/2018

We have an attached growth process with effluent which is high in tiny floating particles. What coul...

By Ryn079, on 03/28/2018

If you have experience in Sugar Mill WWT troubleshooting/consultation, please contact me at: Sam.vas...

By , on 03/28/2018





The two that I have seen are incredibly inaccurate. The will calibrate and get correct slopes and ha...

By , on 12/28/2017


Hi. I work for a property management company. I was wondering if anyone knew of a company that would...

By Will_Raschke, on 04/06/2018

In traditional treatment plant for drinking water...

By Amany_ahmed, on 04/10/2018


In particular, filtration down to 15-50 microns and especially the filtration of ferric iron already...

By Hatsuwr, on 03/30/2018


...

By , on 04/12/2018

Does anyone have feedback for the surface scatter for suspended solids in abrasive effluent...

By Zebra Mussle, on 06/19/2017

Thank you for your help...

By , on 04/17/2018

Have a lot of abandoned 3" steel pipe and unused electrical conduit from former systems still attach...

By , on 04/16/2018

How best to maximize flow pace and when to reduce...

By Morano, on 01/29/2018


Why when renewing water mains is electricity generating grenerating equiptment not placed in the pip...

By , on 10/06/2017

I am looking for sources of information on how to use the results of your color (true and apparent),...

By Joe Scratch, on 12/02/2016

...

By preacherman, on 04/21/2018

...

By preacherman, on 04/21/2018

Hey does any one have any where I can look at some practice questions to help prepare me for my clas...

By Earth, on 04/23/2018

Hello in writing my class 3 water distribution exam in Ontario and was wondering if anyone had any p...

By Earth, on 04/05/2018


UV channel at plant random times throws an alarm water level low total lamp failure and water level...

By Bedboro, on 04/25/2018

How do you remove chrome from wastewater sludge...

By Frankie waldrop, on 04/26/2018

Hello All,I have some foam that gets pretty messy and seems to build up more during warm months and...

By W-WWOperator, on 04/30/2018

Hello Sewage treatment plant used to run day and night but doesn't work now. What could be wro...

By , on 05/01/2018

Why is there small amount of algae in my effluent sample? Thank you for your help...

By , on 05/02/2018


Hello.Would anyone be able to help me determine the energy savings of an urban effluentWWTP (2...

By L23, on 05/09/2018

Could help to differentiate between Phytoremediation and solid immobilizer Bio filter. I want to set...

By Vijay, on 05/11/2018

How much impact does biomass has on treatment? Which treatment method had the high biomass...

By Vijay, on 05/11/2018

What is the best way to clean the packing in a wastewater scrubber without taking the whole thing ap...

By Fredo90, on 05/14/2018

At an intake filter plant, is it safe to just jump in? Chemistry seems close to if not better...

By Mmk, on 05/14/2018

Hello all,Following a spate of incidents due to the use of wet wipe-type products, I am looking for&...

By Leah, on 05/17/2018

What is the difference between the normal and the maximum flow rate , and for design of effluent tre...

By Mana, on 05/17/2018

I want know the CPI oil separator limitations in Petrochemical wastewater treatments.thanks&nb...

By Mana, on 05/18/2018

Hi , I am a mechanical engineer with post graduate certifications in Water and Waste Water Treatment...

By Pulkit sethi, on 05/18/2018

I am wondering how to calculate the size of an opening in a wall to allow for rainwater runoff. ...

By Fredo90, on 05/18/2018

As an operator of a drinking water utility, I am called upon on a regular basis to resolve problems&...

By WWSteev, on 05/23/2018

I am working at the WWTW and looking at the project focused on water recovery within the wastewater...

By Bea, on 05/24/2018

I am currently managing several different treatment plants, and in one of them, thesludge silo...

By L23, on 05/24/2018

...

By 1kevinabernathy, on 05/25/2018

What formula is used to establish control limits for ph standard buffers such as pH 4,7,8, 10. I...

By DR, on 05/26/2018

Economic, social and environmental costs of running a water treatment plant for a year vs. the same...

By , on 05/27/2018



I use potassium permanganate for oxidation of iron and manganese at plant inlet, and Ihave a l...

By Pateau01, on 05/28/2018


There are many kinds of metal filter element for water treatment(Prefiltration),butwhich is...

By greenboy, on 06/04/2018

Under what circumstances would you opt for radar over ultrasonic?At first glance, I would say that r...

By whater, on 06/04/2018

Would anyone be willing to tutor me for my wastewater grade 1?...

By 562isme, on 06/04/2018

What's the cost of typical EGSB reactor for treating cod of 40 kg per day....

By Vijay, on 06/06/2018


Can I get the EPA requirements for waste water dumping. We clean water and I am looking for a testin...

By Cnorelli79, on 06/09/2018

We have a lot of issues with our UV building and design we constantly are getting low water lever al...

By Bedboro, on 06/12/2018

What is the machine for separatig water from rice starch slurry of TSS 11,300 mg/LWhich one to choos...

By Vijay, on 06/12/2018

We have muskrats in one of our lagoon and have done trapping but are surrounded by wilderness and fe...

By lagooner, on 06/14/2018

There are safety concerns with small chainsaws on a pole/proper training. Are there other good...

By lagooner, on 06/14/2018

We have been using chlorine in our SBR tank to help them and want to try peroxide what would the dos...

By Bedboro, on 06/15/2018

The result of the formula in the titleexpresses what I've come to discover I know for certain...

By Picky Frugaltech, on 06/16/2018

In aquaponics and aquaculture, biofilters contain different types of media. Which ones do you use, a...

By Nicolas_Meudal, on 06/18/2018

What do you consider to be the most relevant criteria for selecting UV disinfection equipment?...

By Nicolas_Meudal, on 06/18/2018

Hello, Every time I take a sample from the tap at a drinking water plant (iron removal: 1 round o...

By Pateau01, on 05/23/2018

Hello everyone, I would like to connect my flowmeter (4-20mA output) to the analog input of a PLC...

By Loulou234, on 05/17/2018

I currently have an issue with my Prosonic S FMU 90 ultrasonic transmitter and probe.The desired ope...

By Bonnie, on 06/19/2018

If so, can you please share your conception parameters? Also pros and cons regarding the proce...

By Alinea, on 06/19/2018

Currently we are exploring the option of hooking up into a public municipalities water distribution...

By Will_Raschke, on 06/19/2018

I have a 10,000 gal. 3 chamber tank. I have pumped and power washed all three chambers and installed...

By mudshark, on 06/22/2018

I WILL SOON BE TAKING MY 1 A ABC exam is there any specific I could use to help study,being th...

By Jasonknapp, on 06/23/2018

Recently my husband was at a waste plant in a county building a wall and found out from a worker thi...

By multitasker pump, on 06/26/2018

II am working in a wastewater treatment plant.From the analysez it shows that total nitrogen is smal...

By waterstudent, on 07/03/2018

How often does a private water company have to clean their tank? It is a 10,000 gal steel tank in th...

By rick08, on 07/01/2018



...

By , on 03/01/2018

About two years ago our company provided service to a local water treatment facility and for the pro...

By Bob Ford, on 06/10/2018

Due to scarcity of available land,  it is now pertinent to opt for effective and efficient technolo...

By singhalrk, on 05/22/2018

We are looking at what is the best operational structure for our organisation - a mid-sized water di...

By RobHowes, on 05/22/2018

Hello my name is Rob, I was curious as I have not operated this type of equipment before. Are these...

By , on 07/09/2018

...

By Bidap, on 07/09/2018


Is there any comparison among the these three methods for treating high organic COD rice starch wate...

By Vijay, on 06/08/2018

Should we be using sludge as fertilizer? Please explain....

By Meg, on 05/22/2018




Please tell me how to remove soap from grey water and filter before recycling...

By , on 03/17/2018







I live in Florida and wanted to know what the laws are surrounding dumping the waste water into the...

By , on 09/22/2017

I have a question about chlorine residual. I have sample pumps that pull a continuous stream to a Ha...

By Sludgeman, on 09/23/2017

Which methods are available to control iron and manganese in water?...

By , on 09/22/2017

Hi All I am looking for information on the specific power consumption for process equipment in co...

By tamara, on 09/21/2017

What is the sewage contamination status in Naples FL, resulting from hurricane Irma?...

By , on 09/20/2017


If cost was not an issue what would you use, UV, OZONE or CHLORINE to 'clean' your water?...

By , on 10/06/2017

What do you think of EWG's drinking water database? What impact will this have on our industry? Good...

By Sophie_T, on 10/05/2017

A lot of people take the water systems that bring clean water to and from their homes for granted....

By Nadia Koukoui, on 10/03/2017


  What are the effects of nitrogen and phosphorus on receiving waters?  ...

By Josh D, on 10/08/2017

LS 105 is 30 ‘wide ,20 ‘deep and the pump goes on at 10.5 ‘ and off at 4’  The pumps are ra...

By Dukes-23, on 10/11/2017

  What do the various odors of wastewater indicate?...

By Josh D, on 10/08/2017

Can we use stainless steel impellers instead of bronze...

By , on 09/28/2017


Also, what the quantity we need in order to get a significant effect? Any adverse impact on treatmen...

By Ouananiche, on 10/26/2017

The research points to air stripping or oxidation/filtration, but both come with notable operating c...

By Mike_hydrogeo, on 10/26/2017

I am looking at how to figure out how much it costs my facility to treat 1mg/l BOD and 1mg/l TSS. An...

By Aaron, on 10/26/2017

Here is a useful list ofWastewater acronymsput together by the City of Postfalls, Idaho....

By Nadia Koukoui, on 10/26/2017

The EOCP put a usefulmath quiz together to help you prep for your operator exams....

By Nadia Koukoui, on 10/26/2017

We are looking for a DIY test for bacteria, lead, pesticides and anything that may be harmful in dri...

By Emilio Vargas, on 10/26/2017

We are looking to standardize a procedure for disinfecting the spigot of our permanent sampling stat...

By underpressure, on 10/31/2017

If so, what solutions do you have and what solutions are you thinking of?...

By , on 11/03/2017

I'm in my first RBC plant that has a variable speed drive. At 60Hz (100%) the RBC rotates at about...

By , on 11/03/2017

I have a memtek membrane system and I can not get my flow rate over 8 gpm, normal flow is 40,...

By Barry, on 11/03/2017

I am looking to treat large volumes of waste water from an industrial cooking process. Wastewater is...

By Notorious BOD, on 11/07/2017


BOD is good tss good clarafier looks good sludge return good checked diffusers...

By Csmith12, on 11/08/2017

Looking for a PE to fill a FT Waterwater Engineer position with a South Eastern PA company. If...

By Ed, on 11/08/2017


Foreign partner needed to establish a profitable water and waste water processing company in L...

By Oluays, on 11/12/2017



I have a plastic 35 gallon capacity water tank. How long will the water be able to stay in my water...

By , on 11/14/2017


Hello, I'm looking for a Wastewater Professional Engineer to fill a permanent position. Here's the j...

By Ed, on 11/16/2017


I would like to ask you if you know how to eliminate foam problems in the aeration tank.I...

By Loggan, on 11/17/2017


We are trying to find a local alternative for removal of PAHs from water....

By , on 11/17/2017




What can be done to increase the amount of chemicals added through a mechanical chemical feeder?...

By , on 11/17/2017

My WWTP is is .150MGD capacity. I have 1 industrial user the rest is all commercial and...

By kimholt, on 11/17/2017


What is the best way to remove disinfection by-products precursors from raw water source's...

By Waterguy72, on 11/19/2017

Could you give me an opinion on this?Here is a method to make clean water from the sea: Geothe...

By Swayseeker, on 11/19/2017

What are the benefits of RO water purifiers, and which one is best for home use?...

By Fluid system, on 11/17/2017

In Wastewater do you have to wait a month in between sample events? If you pull a quarterly sample i...

By , on 11/22/2017

I run a small pretreatment facility and am trying to find a method of removing verious svoc's like o...

By , on 11/22/2017







My filter on my well water won't fill after changing filter have no water...

By , on 11/22/2017

My employer has asked me to turn off the mains water to a block of flats to fix a leak that may take...

By , on 11/23/2017

I run a small pretreatment facility and am trying to find a method of removing verious svoc's like o...

By , on 11/24/2017

New operator in a small rural water plant, we take water from an underground aquifer (very clean wat...

By RMWaterboy, on 11/24/2017

Small water treatment plant, we always pumped our chlorine (sodium hypo)right from the jug it...

By RMWaterboy, on 11/24/2017

How far down in the intake valves in the bay are the grates zebra mussels attach to?How often do the...

By Larry Legend, on 11/26/2017

When running a MLSS test, my RAS sample is floating after 2 hours. I’m also getting some slight fl...

By Hunter, on 11/27/2017


In a new wastewater treatment plant, the builder installed a mechanical plug in the ground as an anc...

By Breizh'eau, on 06/06/2015

I am treating water for discharge that has high copper counts as well as solvents,oils and other met...

By jcsaubert, on 11/30/2017


Best way to treat a well for iron & maganese....

By Randus, on 12/02/2017

The water plant has greenleaf filters & experiencing short filter runs due to head loss & go...

By Randus, on 12/02/2017

Surface water treatment plant has basins and filters outside. Note floc not settling in cold tempera...

By Randus, on 12/05/2017


Between water vaporization, gravity purifiers, or pulling the water out of thin air which are all po...

By Wallis, on 12/06/2017


For those who live in oil-producing areas and work in wastewater treatment:1. Are liquid oxygen tank...

By tamara, on 12/08/2017

I am trying to plan a condo / rental complex for senior active living. i am trying to envision...

By greengrassenv, on 12/08/2017

I am posing this question at a seminar next week and curious to hear from you what your greatest cha...

By Dean, on 12/09/2017

Is my land worth anything now that it's next door...

By deb, on 12/10/2017

Going to work in France and need to know what we are doing is right!...

By , on 12/11/2017


I bought a utilitech 54 gal diafram tank at loews about a year ago.  it sat with no water on it for...

By wino, on 12/11/2017

I have an onsite treatment system using alternating ejector pods (using low pressure air) t...

By Mo, on 12/12/2017

I am working at effluent treatment plant of a paper and board mill. I am facing issues of floating s...

By Fatima, on 12/13/2017


While reading a webpage of a purifier company -->Click Here. I am just checking the points...

By rajkumar, on 12/14/2017




For an international client I have to remove N and and P in an existing RBC plant with retrofit. Can...

By maxhof, on 12/15/2017

What would be the best way to treat a high COD industrial effluent out of :- 1)...

By Pulkit sethi, on 12/15/2017

Why do we allow water fluoridation when it is contrary to our primary purpose?...

By Lightasafeatherglass@gmail_com, on 12/17/2017

N and P nutrients cause damage to water body but what if the effluent discharge containing nutrients...

By Pulkit sethi, on 12/18/2017

Where can I dispose of 425 gallons of grey water collected from pressure washing dumpsters...

By Carolyna, on 12/20/2017

We run a small (365 connections) water system which has about 75% of the connections at summer cotta...

By islandwater, on 12/21/2017

What are the issues or hassles of current methods of testing water or wastewater for E.coli? I have...

By Amir, on 12/22/2017

We are working on low cost water well drilling for developing countries. Found som...

By G W, on 12/27/2017

I started a new job about six months ago and they were adding polymer to the aeration basin for sett...

By jarebear83, on 12/28/2017

3 Aeration ponds with 6 (5hp) electric aerators each....

By , on 12/28/2017

Lumpy water math choice of ancers A....0.12 acres........B...0.14 Acers.. C..1.38 acers.......

By stephenjp, on 12/31/2017

Hello,We have developed a biomass to hydrocarbon fuel conversion system and have a large amount of w...

By KBurnham, on 01/01/2018

How can I determine the value of dissolved oxygen in a reservoir or a stream having the of correspon...

By Surajo_Said, on 01/02/2018

We have a slow water break somewhere on our distribution system (vast rural system) but can't find t...

By RMWaterboy, on 01/02/2018

Our plant has anaerobic digesters and uses belt filter presses to remove the solids. Right now the d...

By OITnewbie, on 01/04/2018

Has any had any possible ways of keeping aluminum sulfate from clogging there supply lines. We have...

By Kal, on 01/05/2018

Hello Everyone,I've been tasked with verifying the pump external static pressure for an infrastructu...

By tj00343, on 01/06/2018

Hello,Is anyone familiar with the French Standard DTU for water supply infrastructure networks. I'm...

By tj00343, on 01/07/2018

Looking for feedback on ABB meters for district metering (sectorization)...

By Robert_D, on 06/02/2017

I’d like some info on the equipment: -durability of sensor and membrane, -interval between 2 calib...

By Zebra Mussle, on 06/19/2017

What feedback do you have on Flygt flush valve?...

By Epistylis, on 06/19/2017

Looking for feedback on Khrone meters for district metering (sectorisation)....

By Robert_D, on 06/02/2017

Looking for feedback on Siemens meters for district metering (sectorisation)....

By Robert_D, on 06/02/2017

I would like some feedback from anyone who has used it in the field in order to determine how effect...

By Bicarbonate de Soude, on 06/19/2017

Do you have any feedback on a Börger grinder placed upstream of a pump that feeds a centrifuge?  T...

By Zebra Mussle, on 06/19/2017



What can I do to fix this? I've ran air lines thru the bottom of the tank and oh and treatment is al...

By Merzzz, on 01/16/2018


The carbon filter is connected to a water softener unit.  I believe it is an ion...

By Bk13, on 12/07/2017

What is the best sample method for testing pH and if there is a white filamentous growth in the wast...

By mharanas, on 01/22/2018

I'm currently a Southern California volunteer/unpaid wastewater Operator-In-Training(OIT)...

By waterscience, on 01/24/2018

Has someone come up with a safe way off cleaning CL2 build up around pump panels and fittings?...

By Gordon, on 01/24/2018

I have an interesting problem I'd like to gain more insight on. Specifically, how do global industri...

By Budgierigar, on 02/01/2018

They built a chloramine conversion plant next door. I literally can almost reach over to a 1100 gall...

By , on 02/01/2018


3 cell aerated lagoon, two clarifiers. Running only one clarifier at the time due to maintenan...

By Hendu2875, on 02/02/2018

After starting the treatment process in my SBR (activated sludge) tanks the dissolved oxygen will no...

By Gomuman, on 02/03/2018

I observed on a industrial wastewater treatment (chemical&pharmaceutical) plant a strong inhib...

By tamara, on 02/03/2018




...

By , on 02/05/2018

Are there metered check valves that record in both directions of flow in case of backflow ?...

By , on 02/05/2018

What is the most important federal law impacting the water utility industry?...

By , on 02/05/2018


I have a 90 ft stand pipe and across the street from it there's only 28 lbs of pressure why? i would...

By , on 02/05/2018

I hear antibiotics, birthcontrol, etc do not get fully metabolized by the human body and get flushed...

By HFEA, on 02/05/2018



And also need material for reverse osmosis system for pharma industry...

By suresh, on 02/06/2018

Howxtopurify water...

By Azwitamisi, on 02/08/2018

I am Canadian raised and educated but hold USA passportI have systems that may use shovel and...

By Rtb, on 02/10/2018

The town water is filtered via sand giving a silica. level of 41ppm..reverse osmosis and strong anio...

By , on 02/12/2018


What is the procedure of cleaning borehole water and bottling for sale in kenya...

By Kings, on 02/13/2018



I'm looking for feeback on HUBER’s RakeMax screen bars and how they handle pebbles and s...

By Epistylis, on 06/19/2017

We are occasionally seeking WWTP Operators for government contracts throughout, where is the best pl...

By , on 02/13/2018


Hi All, Based on our water analysis report that the TDS level is 4135 mg/l and chloride level is 235...

By , on 02/15/2018

Plant I'm running is .250GPD extended aeration reuse wastewater plant that was not originally design...

By frankel, on 02/16/2018

I work in a phosphate coating company and the water dept noticed mercury in higher levels than requi...

By Cheryl, on 02/16/2018

How to measure the necessary DO to reduce COD through biological or Electro-Oxidation aeration syste...

By pratmod, on 02/18/2018

How to calculate amount of bleaching powder required for 1000 gallons of water so as to get .2 ppm v...

By , on 02/19/2018




How often should PH buffer realistically be changed when calibrating PH meters....

By frankel, on 02/20/2018

I am looking for a good O2 sensor for an aquaculture project, specifically in order to regulate aera...

By Nicolas_Meudal, on 02/20/2018

We are currently using ferric chloride to remove phosphate via physicochemical process in our WWTPs...

By Kesakeau, on 02/20/2018

Hi all, Can you provide me with a precise explanation of the relationship between pressure and fl...

By Gilchrist, on 02/20/2018

Can you tell me where I can get detailed information on how to obtain values for COD, BOD, water har...

By CHOUGRADI, on 02/22/2018

Do you know of any supplier of lamella plates (not hexagonal shaped) that can be used for de...

By meryac, on 02/22/2018

Hi, I am working on a small-scale MBBR project to a depth of about 6.5 feet. What brand of...

By Nicolas_Meudal, on 02/22/2018

What can cause bathtub water to turn a dark blue, with some type of particles in it?  This problem...

By , on 02/21/2018


Within the framework of our local fire control program, we have come up against the problem of a ver...

By b38, on 02/22/2018



  As the operator of a 25,000 PE activated sludge plant, every year I see my sludge inde...

By Boris, on 02/22/2018

...

By Corlican, on 02/23/2018

...

By , on 02/23/2018


We have multiple Pressure Reducing Valves on our distribution system and a reocc...

By RMWaterboy, on 02/20/2018


I have constructed a sedimentation/filtration plant to recycle the waste water from an a vegetable o...

By , on 02/26/2018

Does a treatment plant get rid of salt in water...

By , on 03/01/2018


Do Cities treat drinking water with AMS, Ammonium Sulfate ?...

By , on 03/01/2018

Naresh Parekh  Civil engineer...

By , on 03/01/2018


How can I tell if the city has shut off my sewer line because my water company says service is on an...

By , on 03/01/2018


Math problems for D license for surface water...

By , on 03/01/2018

Can a public water service provider use conduit pvc pipe to run water to your home?...

By , on 03/01/2018

I'm a recent graduate of Vermilion community collage of Ely,Mn in 2017. I have recently moved to New...

By skip, on 03/03/2018


A tank measures 53ft long, 30ft wide, and 21ft deep. If 93,000 gallons of water are pumped into the...

By , on 03/05/2018

Help me highlight the physical and chemical properties in tropical aquaculture...

By , on 03/05/2018


  I am wondering whether it is possible to determine the c...

By Iam2yo, on 02/20/2018

...

By kscheong1957@gmail_com, on 03/06/2018

Iam currently undertaking a masters level research project considering coagulant use and chlo...

By MatthewSmith25, on 03/07/2018


IS THERE ANY COMMERCIAL POTENTIAL TO THE FATS SKIMMED? CAN THEY BE BURNED FOR FUEL? CAN THE BE SOLD...

By GALLOWSMASTER, on 03/10/2018


Can anyone tell me the difference of these two check valves?  I know different ones are used for i...

By RMWaterboy, on 03/16/2018

Lower dissolved oxygen in sbr tank...

By , on 03/17/2018

When pumping out dirt pits, or manholes are there disposal requirements for water that appears clean...

By , on 03/17/2018

I'm interested in learning about companies and consultants who have done projects to manage wet weat...

By NicH2Olas, on 03/19/2018

Hello I want to calculate the actual consumption of neutralite during neutralization treatment in a...

By tet2lar, on 02/03/2017

We install about 600 meters a year and maybe 50 - 100 service lines. Actual invoicing is to cumberso...

By HeavySevy, on 01/31/2017

My company is an alcohol sanitizer production facility. We are trying to determine a cost effective...

By lxBATESxl, on 01/31/2017



The municipality where I work as a wastewater treatment plant operator used to irrigate our plant la...

By jarvissinger, on 12/30/2016

It’s normally not even above 0.5ppb. Any thoughts as to why this might be?...

By Hoydenw, on 01/09/2017

I’m concerned about how long the system will last. Are there any clues I can look for to make sure...

By WeiKung, on 01/09/2017

I'm second guessing myself here. But SternPAC is cationic right?...

By Joe Scratch, on 01/04/2017




Good Morning, I am noticing that with the cold weather on us my basins are not settling as well. I...

By Jessica, on 12/29/2016

I am overseeing the establishment of a drinking water facility in my community here in France. The...

By WWSteev, on 08/08/2018


...

By curious sewage, on 08/12/2018



I am operating a 1500-PE treatment plant; I performed my tests, namely V30 with 1/4 dilution and slu...

By Amphinitrate, on 08/09/2018

I’d like any feedback you might have on the operation of bottom mixers in an aeration tank. In a...

By Fredo90, on 08/14/2018

...

By Stephen_Morrison, on 08/13/2018

<p>I am looking for any information to identify a best practice for sample result accuracy for...

By Trumpton, on 08/14/2018

<p>Hello,</p><p>I am a koi hobbyist and we use beneficial bacteria in our ponds to...

By Koi_Kid, on 08/16/2018

<p>Hello, we are currently designing a system for zinc and heaving metal reduction, can anyone...

By stormwater_sewer_fiberglass, on 08/20/2018

<p>Would like to know guidelines criteria for deciding the STP/ ETP location in a large are ha...

By Vijay, on 08/21/2018

Do you have feedback on the FMU90? Especially in terms of sturdiness and reliability (interference e...

By Bidap, on 08/23/2018

Can anyone suggest some online documentation regarding the theoretical calculation of a water hammer...

By Pateau01, on 08/23/2018

<p><font face="Arial" size="2">What are the most important parameter...

By cooperating chemist, on 08/27/2018

<p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt;"><...

By L23, on 08/28/2018

<p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt;"><...

By whater, on 08/28/2018

Hello, at my plant we use 50% caustic soda solution we receive in chemical totes. We then feed the 5...

By CBLEric, on 08/29/2018

<p>Hello everybody,</p><p>My role is leak detection for a large water company and...

By Sherlock, on 08/25/2018

<p>When I turn off the skimmers in the clarifiers for a period of time all the sludge rises to...

By danny soprano, on 08/20/2018

What could be causing DO yo drop off in the effluent?...

By , on 08/23/2018



Currently we are using water softeners to reduce water scaling.The treated water contains sodium whi...

By Vijay, on 07/22/2018

To neautralize an alkaline waste water what is needed...

By , on 08/06/2018

VEGAPULS 69 is the ideal universal radar sensor for bulk solids, according to Vega’s product infor...

By whater, on 08/29/2018

How do you raise ph in wastewater?...

By , on 08/21/2018

Can you tell me how to perform a half-flow washing of sand filters using a pump that is not equipped...

By Pateau01, on 08/29/2018

Interesting phenomenon that happens every am at my treatment plant.&nbsp; Each morning around 7a...

By wallmanc, on 08/29/2018


Our SVI at our plant took a turn from 116 to 84 pretty much overnight. At this point our sludge star...

By Wadjdanejavel, on 08/30/2018


My sludge depth is  decreasing but my returns have not changed.  What is the problem ?...

By Usa, on 08/30/2018

How many gallons of hypochlorite (5% available chlorine) must be added to 200 gallons of water in or...

By , on 09/05/2018

We need to refine the filter media. We used quartz sand: 1-2 mm (25 tons); 4-6 mm (15 tons) and 15-2...

By , on 09/05/2018

There is a dry cleaner in a shopping center that my wastewater plant serves. I have a BNR plant that...

By It happens, on 09/06/2018

<p>I bought the filter nozzle for the first time,&nbsp;I have a problem,&nbsp;my frien...

By greenboy, on 09/06/2018

<p>I am talking to a city council and need to explain this on their level. I am working with a...

By fearless lagoon, on 09/07/2018

<p>I recently bought a home in quebec and i don't know if the pipe of water or wastewater free...

By masi, on 09/10/2018

<p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt;"><...

By L23, on 09/12/2018

I would like to know if anyone uses this type of device in a drinking water utility; if so, what are...

By whater, on 09/12/2018

<p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt;"><...

By WWSteev, on 09/12/2018

<p>For most levels there's a Sacramento State course we need to complete in order to qualify f...

By nopeda, on 09/12/2018

<p>We receive separate bills for the water we use and a sewerage charge,&nbsp; The charges...

By determined bubbles, on 09/17/2018

<p>Hello, I am the safety officer for a wastewater treatment plant, and I am wondering what sa...

By hectorh, on 09/18/2018

<p>Hi, Does anyone have experience of the above please ? In particular did/do you have any iss...

By convoluted soda, on 09/19/2018

I would like to evaluate the residence times of water in the pipes of a drinking-water distribution...

By lberneau, on 09/19/2018

What are the health risks posed by HDPE pipes?...

By lberneau, on 09/19/2018