Treatment plants working on the oxidation principle are aeration tanks, contact beds, intermittent sand filters, trickling filters and oxidation ponds. (2) Anaerobic decomposition - Fresh sewage contains oxygen to the extent of about 2 to 5 ppm. The aerobic ... (4) Fresh sewage does not have offensive odour. But after about 2 anbsp;...
|Publisher||:||Krishna Prakashan Media - 1991|