Mechanism of biological phosphorus removal

The most basic principle of biological phosphorus removal is that in the anaerobic - aerobic or anaerobic - anoxic alternating operation system, the use of phosphorus microorganisms with anaerobic phosphorus release and aerobic (or anoxic) absorption of phosphorus characteristics, so that the concentration of phosphorus in the aerobic or anoxic section of the mixture of a large number of reductions in the final through the discharge of a large number of phosphorus-rich sludge to achieve the purpose of removing phosphorus from the sewage.

Biological phosphorus removal, refers to the activated sludge method of sewage treatment, the activated sludge alternately in anaerobic as well as aerobic operation, can make the excessive accumulation of phosphate accumulation of phosphorus bacteria dominant growth, so that the activated sludge phosphorus content is higher than ordinary activated sludge. The phosphorus-accumulating bacteria in the sludge release phosphorus in the anaerobic state and take up phosphorus in excess in the aerobic state. After discharging the phosphorus-rich residual sludge, the result is that more phosphorus can be removed from the sewage compared with the ordinary activated sludge method.