How many hours should a small WWTP operate per day?
I have owned a 30-PE treatment plant manufactured by ISEA for 10 years.
At the moment we are about 30 users, give or take 10, and have noticed unpleasant odors.
So I need to optimize the efficiency of my plant.
I had my three tanks drained, leaving about 1/3 of the water in the tank, and injected 6 doses of bacterial additives.
My plant is made up of 3 tanks.
-500-liter screen rake
-5 m3-bacteria tank
There is one blower for aeration and another for recirculation between the last two tanks. I have an air vent in the roof, which is where the smell comes from.
I don't know how adjust the operating time cycle.
Should it be continuous?
One hour on every two hours?
A different schedule?
For the moment I have it running from midnight to 7:00 in the morning to avoid producing smells during the day.
Is that okay?
There are valves to regulate airflow for the oxygenation and recirculation.
They are open to the max—maybe that's too much? The bubbling is really loud and the water moves from one tank to another pretty quickly.
Can someone help me? Thanks.
Odours will be caused by lack of oxygen in the aeration system. You need to maintain above 1ppm of O2 the be sure of no odour. I would recommend controlling the blower from an oxygen sensor. This will then turn on the air when needed, so you maintain enough to control odour, but don't over add air when it isn't needed. If you have to use a timer, then little and often is better than one huge aeration once per day.