First, the main reasons for the excess of total phosphorus in sewage

The excess of total phosphorus in sewage is mainly caused by the discharge of domestic sewage, industrial sewage discharge, and agricultural non-point source pollution.

Second, how to reduce the total phosphorus in urban domestic sewage?

The most common way to reduce the total phosphorus in urban domestic sewage is the biological phosphorus removal method.

Third, the principle of biological phosphorus removal is?

The main principle of biological phosphorus removal is to use phosphorus-accumulating bacteria to fully release the polymeric phosphate in their cells under anaerobic conditions, and under aerobic conditions, they can absorb phosphorus from water beyond their physiological needs, and convert it into the characteristics of polymeric phosphate in cells to form phosphorus-rich biological sludge. This phosphorus-rich sludge is discharged from the system through precipitation to achieve the effect of phosphorus removal from wastewater.

4. Common urban biochemical wastewater biological phosphorus removal process

① Aerated biological filter

② SBR process

③ A/O process

Fifth, why is the total phosphorus of sewage high in winter?

Phosphorus polymers suitable temperature 15~ 25 ℃, winter water temperature is low, so most of the strains will die, failed to play a good biological phosphorus removal effect, the total phosphorus concentration is high.

Sixth, can you heat the sewage?

line! But it is not practical to rely on heating to protect strains in winter in the north, the amount of urban domestic sewage is large, and the heating cost is too high.