Anghel, strat identifyiung ...
Published by valter tandoi
Anghel, strat identifyiung the section where the odour is produced, Normally in Domestic wastewater the main odiur comes from the sewage, especially if there is immission of air to remove oil, sands etc. The activated sludge basins, if the process is properly operated, has a typical pleasent "humus smell" if there is always enough oxygen. Also secondary clarifiers do not have to rpoduce bad odours. The section that produces unpleasent smell is the sludge dewatering: this has to be confined and air removed and treated.
If the plant is an Industrial WWTP, the bad odour apart ,the waste sludge line, can be produced in the aeration tank where some compounds can be stripped: here you have to investigate as Matthews suggests.