What is the reason for the excess of total phosphorus?

1. The main reason for the excess total phosphorus in sewage is

(1) Sludge load and sludge age

Sludge aging, or excessive sludge load will lead to poor treatment effect

(2) Dissolved oxygen

Improper control of dissolved oxygen in the anaerobic zone and aerobic zone will greatly affect the effect of biological phosphorus removal.

(3) Hydraulic retention

The residence time is too short, one is that the effective release of phosphorus cannot be guaranteed, and the other is that the facultative acidifying bacteria in the sludge cannot fully decompose the macromolecular organic matter in the sewage into lower fatty acids for the ingestion of phosphorus-accumulating bacteria, which also affects the release of phosphorus.

(4) pH

Low pH is favorable for phosphorus release, high pH is favorable for phosphorus absorption, and phosphorus removal effect is a combination of phosphorus release and absorption. Therefore, in the biological phosphorus removal system, the pH of the mixed solution should be controlled within the range of 6.5 to 8.0.

2. The function of biological bacteria powder in sewage treatment

（1）It can quickly multiply in the biochemical system and hang the film on the filler, convert the ammonia nitrogen and nitrite in the sewage into harmless nitrogen and release it from the water body, reduce the amount of odor released, inhibit the growth of spoilage bacteria, and reduce air pollution.

（2）Accelerate the removal of phosphorus and improve the stability of the system. Through the action of bacteria, the cost of water treatment is low, and the acclimation time and film hanging time of activated sludge can be shortened.

（3）Good degradation of organic matter in water，Powerful removal of BOD, COD and TSS, significantly improving the sedimentation capacity of solids in the sedimentation tank