How to detect turbidity in the effluent from the aerobic tank
Thread Content
This post was last edited by CoCo070563 on 2015-11-24 at 17:24. The effluent from the aerobic tank is turbid; I’m now concerned that the sludge may have aged. I want to increase the load, but when testing the COD of the incoming water and that of the aerobic tank, I found that the COD level in the effluent from the aerobic tank was 1200 mg/l, while after filtration it dropped to 300 mg/l. Is the organic load in the aerobic tank too low? I’m a bit unsure whether filtration is necessary when measuring the COD in this tank. In the past, no filtration was needed when the effluent wasn’t turbid, but now it’s very turbid and dark in color, making it difficult to determine the exact SV30 value. At present, is it necessary to filter the COD measurement in the aerobic tank when the effluent is turbid?
I think it was something like this: UV analysis does not require filtering, while potassium dichromate analysis does require filtering.