Can increased oxygenation break down more COD in a WWTP?
Can increased oxygenation break down more COD in a WWTP?
(OP)
We treat effluent of a fast food restaurant in an activated sludge treatment plant. Our effluent is quite turbid, TSS levels around 50 mg/L and COD levels of the effluent are around 300 - 500 mg/L. COD inflow is around 1,500 mg/L.
BOD5 levels are very low, around 1-3 mg/L. MLSS is about 200 ml/L.
We use Venturi aeration and as BOD levels show this system is quite fine. However due to excessive use of detergents and disinfectants in the restaurant we believe that non-biodegradable matter increases the effluent COD. Hydrolyzed oil/grease might contribute as well.
Question: will doubling of the oxygen intake by addition of one Venturi aerator help to reduce effluent COD?
BOD5 levels are very low, around 1-3 mg/L. MLSS is about 200 ml/L.
We use Venturi aeration and as BOD levels show this system is quite fine. However due to excessive use of detergents and disinfectants in the restaurant we believe that non-biodegradable matter increases the effluent COD. Hydrolyzed oil/grease might contribute as well.
Question: will doubling of the oxygen intake by addition of one Venturi aerator help to reduce effluent COD?





RE: Can increased oxygenation break down more COD in a WWTP?
The O2 supply may or may not be the limiting factor here.
Measure the dissolved oxygen in the treatment unit to determine if you need additional aeration.
RE: Can increased oxygenation break down more COD in a WWTP?
thanks for your post, I will go there, MLSS increase makes sense a lot.
Cheers
munich