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Alexabartel (560 pts)
21 hours Ago
Do you have any recommendations on ways to avoid drinking contaminated water while I’m out of the country?
Normal
0
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false
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X-NONE
...
water
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Tamie (41110 pts)
1 day Ago
Is tetrapotassium pyrophosphate added before or after the filter
treatment-plant
water
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Answered by
Tamie (41110 pts)
1 day Ago
What can be the problem with effluent. It's a separated contact and reaeration. Inffluent is split in 2 plants.
Recently were encountered problems with one of the 2 clarifiers in our waste treatment. The effluent has turned murky ad turbid. The mlss is at 35 to 40 compared to 50 to 60 on the other clarifier.. We've checked DO and it's perfect on the clarifier that's having problems, it's actually a but ...
treatment-plant
wastewater
wwtp
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Tamie (41110 pts)
1 day Ago
Any suggestions on chemicals to use for breaking up clumped soda ash in silo?
other
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Answered by
Tamie (41110 pts)
1 day Ago
WHAT CAUSES 200 hp blowers to trip out due to low amps surges
I am a wastewater operator. Our plant is presently going through a million gal. expansion. We went from a smaller blower to a 200 HP blower. there's four of them. its super hot in the blower room with no ventilation unless sliding garage type doors are open, the blower panel room is also super hot h...
wastewater
wwtp
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Tamie (41110 pts)
1 day Ago
What happens in 1-2 of chlorination break point
distribution-system
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Tamie (41110 pts)
1 day Ago
How to lower coliform discharges?
wwtp
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Answered by
Water eagle (280 pts)
2 days Ago
Membrane Bioreactors
What are the most important parameters to monitor when using Membrane Bioreactors?
wastewater
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Answered by
Tamie (41110 pts)
2 days Ago
what is the standard value of EC of driking water?
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Answered by
Bonnie (1880 pts)
2 days Ago
Mechanism for reversing hard-wired logic
A few months ago, we automated one of our lift stations using a hard-wired design, with a pre-set sequence (defined in the control diagram) for starting the electro-pumps. In practical terms, there are three electro-pump units that start one after the other in a predefined order and according to wat...
other
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Answered by
whater (1340 pts)
2 days Ago
CMMS/EAM and equipment coding
Does anyone have experience coding equipment for configuration in a CMMS application? Specifically, I am looking for a system that, while unique to us, would allow equipment to be moved from one site to another without the need to rename it.
other
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6
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Answered by
L23 (2040 pts)
2 days Ago
BOD5 higher than COD
I have a small problem with the lab analysis conducted on a municipal wastewater station. Analysis of BOD5 indicates it is superior to the COD (727/767). Any idea what might cause this and what repercussions it will have on the utility?
regulation
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Answered by
Retaw (1400 pts)
5 days Ago
Can we do without installation of an air-release valve?
This is my scenario: a 125mm-pipe network is to be installed under a rural highway (natural ground is almost "flat" so, in order to comply with a 0.6% gradient for the project phase, I have a high point and a low point in the design). I have been asked not to place an air valve at the high point in ...
distribution-system
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Retaw (1400 pts)
5 days Ago
Strong gasoline smell coming from a manhole cover what should you do?
If you smell a strong gasoline smell coming from a manhole cover, what should you do?
collection-system
treatment-plant
wastewater
wwtp
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Answered by
Alexabartel (560 pts)
1 week Ago
Would you recommend a water filter or a water purifier for this occasion?
I am going on a backpacking/hiking trip and will be outdoors for about four days, would you recommend a water filter or a water purifier for this occasion? I am looking for the most comfortable and most convenient option for drinking clean water.
water
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Answered by
Civil engineer (140 pts)
1 week Ago
Can a water company increase bill by 100% twice a year?
A water company bought our water company, bill went up 80%, 3 mknths later they want to increase again makkng it over 100% increase from before they bought it. They also use a fixed sewage rate no matter the amkunt of water used. Hurting those on fixed income. I pay more for water than electricity n...
water
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Asked by
smart zinc (880 pts)
1 week Ago
conventional activated sludge
MLSS in the aeration tank of a conventional activated sludge process plant is 3700 mg/L, SVI is 80 ml/g, so the SV is _______%.
other
treatment-plant
wastewater
wwtp
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Tamie (41110 pts)
1 week Ago
Carbon/nitrogen ratio in a digestion tank
I’m having trouble understanding the method for calculating C/N ratio in a digester. What kind of N are we talking about?Once we have the report, how should we interpret it?
wwtp
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Amphinitrate (1080 pts)
1 week Ago
How do you manage on-call duty?
We would like to set up a system to manage weekend on-call duty for the monitoring of small wastewater treatment plants and a collection network (lift-stations). Do you have any sample procedures?
collection-system
wastewater
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7
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1 Votes
Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
Chromium 6 Removal?
What is your preferred method for Chromium 6 removal?
Does anyone have experience with weak base anion exchange (pros/cons/tips)?
chromium6
drinking-water
epa-regulations
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wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
water quality change in groundwater
I am working with a small community that has one active well, which went into service in 2009. At that time, its water quality had similar characteristics of other wells in the area: about 350 mg/L calcium carbonate hardness, 260 mg/L total alkalinity, 0.6 mg/L iron, and 0.97 mg/L fluoride. By 2013,...
distribution-eau-potable
electromecanique
instrumentation
reglementation
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Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
Which items can clog filters at water treatment plants
treatment-plant
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Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
Technology alternative to water softening
Currently we are using water softeners to reduce water scaling.The treated water contains sodium which may not be good for consumption for people having low BP.Is there any technology alternative to softeners which will reduce the scaling and at the same time don't introduce sodium in the treated wa...
treatment-plant
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6
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Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
Meters clogged with lime scale
As an operator of a drinking water utility, I am called upon on a regular basis to resolve problems due to the accumulation of lime scale, particularly for consumers using high-flow meters (DN 30mm) that get clogged. The distributed water is definitely hard: 270-280 mg calcium carbonate/l. ...
distribution-system
water
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4
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Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
Seeking established company to jv with on opportunities in indigenous communities
We are a new indigenous company seeking qualified water proffessionals to assist us in providing safe drinking water to remote indigenous communities.
water
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2
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Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
How to remove nitrate from water?
At present, nitrate pollution is becoming more and more serious, which not only causes pollution to the environment, but also causes harm to the human body. Nitrate can be changed to toxic nitrite in the digestive tract. Then nitrite can oxidize low methemoglobin to high ferrous erythroprotein in hu...
wastewater
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Answered by
wastewater treatment specialist-Sunresin (1120 pts)
1 week Ago
How to remove nitrate from water
There is nitrate in my water his do I remove it,Can reserve osmosis remove
treatment-plant
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Asked by
smart zinc (880 pts)
1 week Ago
A wastewater contains ammonia nitrogen (calculated on nitrogen)
A wastewater contains ammonia nitrogen (calculated on nitrogen) 150 mg/L, BOD5 210 mg/L, and its pH value is 7.5. The Nitrification-Denitrification two-stage activated sludge process is chosen to treat this wastewater, and methanol is used as the additional carbon source for denitrification. Assumin...
wastewater
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Asked by
DR (2080 pts)
1 week Ago
Is it ok to use a warming plate to bring CBOD samples to room temperature?
CBOD samples are cold in wintertime. Is it OK to use warming plate to bring them to room temperature?
wastewater
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0
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Asked by
smart zinc (880 pts)
1 week Ago
Aeration Devices
Among the following aeration devices, which one’s aeration efficiency is the highest?Aeration rotation brush, Impeller, Perforated pipe, Micropore aerator
wastewater
