Method for purification of phosphate-containing sewage

摘要: For improvement of the phosphate redissolution taking place under anaerobic conditions, treatment is conducted preferably in a settling tank, into which unsettled raw sewage and return sludge from secondary tank are introduced. The retention time generally over 5 hours, 10-24 hours. In any case, detection exceeds hydraulic time. new process can be performed by using most existing plants with relative small investment expenditures provides phosphorus elimination on order magnitude 90%.