Do you know how wastewater is dephosphorized？

AAO biological reaction process is the use of phosphorus-accumulating bacteria in anaerobic (phosphorus) conditions and aerobic (phosphorus absorption) conditions, and finally through the sludge effect of phosphorus (salt) removal process.

Water treatment phosphorus remover: mainly used to remove inorganic phosphorus, organic phosphorus and other total phosphorus in water, effectively solve the eutrophication of water, used in electroplating, circuit board, chemical industry, domestic sewage and other wastewater treatment. It has adsorption, bridging, coagulation, co-precipitation, net capture, replacement, ion exchange and other mechanisms of action, and has obvious advantages in strengthening the removal of heavy metal ions, COD, ammonia nitrogen, chroma, suspended solids and other aspects.

The basic process of biological phosphorus removal

1. Excessive uptake of phosphorus by Phosphorus Removal Bacteria

Under aerobic conditions, Phosphorus Removal Bacteria use BOD5 in wastewater or the energy released by the oxidative decomposition of polyb-hydroxybutyric acid stored in the body to absorb phosphorus in wastewater, a part of phosphorus is used to synthesize ATP, and the vast majority of phosphorus is synthesized as polyphosphate and stored in the cell body.

2, phosphorus removal bacteria release

Under anaerobic conditions, dephosphorization bacteria can decompose polyphosphate in the body to produce ATP, and use ATP to absorb organic matter in wastewater into cells, in the form of polyb-hydroxybutyric acid and other organic particles stored in cells, but also the decomposition of polyphosphate produced by the phosphoric acid discharged from the body.

3. Discharge of phosphorus-rich sludge

In the aerobic conditions of the uptake of phosphorus than the release of phosphorus in anaerobic conditions, wastewater biological phosphorus removal process is the use of phosphorus removal bacteria this process, the excess sludge discharge system to achieve the purpose of phosphorus removal.