Biological Aerobic Agent for Sewage Cleaning

Treatment of sewage exceeding standard

Each sewage treatment process has its own characteristics, different treatment process, different structures due to influent, hydraulic retention time, sludge concentration, facilities and other factors, the removal efficiency is also very different.

A/O process

The traditional wastewater treatment process is an improved form of activated sludge process, which mainly includes anoxic and aerobic stages.

Requirements for Related Parameters

Hydraulic retention time (nitrification > 6h, denitrification < 2H)

MLSS (> 3000mg/L)

Age of sludge (> 30d)

N/MLSS loading rate (< 0.03)

Total nitrogen concentration of inlet water (< 30mg/L)

The removal efficiency of each index

In the anoxic phase:

COD → 67%, BOD5 → 38%, SCN- → 59%, phenol → 62%, organic matter → 36%

It should be noted that if the removal efficiency is improved, the inner circulation ratio must be increased, which increases the operation cost.

At the same time, the inner circulating liquid from the self-aeration tank contains A certain amount of DO, which makes it difficult to maintain the ideal anoxic state in the A section, affecting the denitrification effect, and thus leading to the difficulty of reaching the standard of the effluent.

How to solve the problem of substandard standards?

"In the limited process equipment, the treated sewage is still not up to the standard, so many engineers will use chemical agents for subsequent in-depth treatment, such as ammonia nitrogen removal agent, COD degradation agent, phosphorus removal agent, heavy metal capture agent, etc., quickly reach the standard, the removal rate is up to 96%.