Domestic sewage treatment method

Abstract

The invention relates to a domestic sewage treatment method. The method includes the first step of separation of sewage sundries, the second step of anaerobic hydrolysis treatment, the third step of biochemical treatment of the sewage, the fourth step of sediment, the fifth step of coagulation and dephosphorization, the six step of flocculation and sterilization and the seventh step of removal of suspended solids and phosphorus. Biochemical treatment of the sewage includes the specific steps that firstly, microfloras in activated sludge are cultured; secondly, biochemical denitrification is conducted; thirdly, biochemical dephosphorization is carried out. The sewage treatment method is high in sewage treatment efficiency and can effectively remove COD, BOD, SS, N and P, the treated water can serve as domestic water, the target of reuse of wastewater is achieved, and circulating use of resources is achieved. A domestic sewage treatment agent in the method is quick in reaction speed and does not generate toxic and harmful gas in the process. Products generated after reaction are stable, cannot be decomposed into harmful matter, are efficient, free of toxin, safe to human bodies before and after the reaction, and do not corrode objects. Sewage treatment efficiency is high, the treatment method is good in effect and low in energy consumption.

Description

technical field [0001] The invention relates to a domestic sewage treatment method, which belongs to the technical field of sewage treatment. Background technique [0002] At present, environmental protection has become a concern of the world, and the discharge requirements of domestic sewage are strict. The country has adopted [0003] Corresponding mandatory measures, seeking an effective domestic sewage treatment agent, which can meet the sewage discharge requirements after sewage treatment, is a difficult problem that many enterprises need to solve urgently. Sewage treatment technology plays a very important role in water saving, energy saving and other issues, but at the same time, the use of sewage treatment chemicals also has a certain impact on the environment. [0004] The traditional sewage treatment process is mainly based on biological methods. The operating cost is low, which mainly solves the pollution problem, not to mention [0005] use. However, the old ...

AI Technical Summary

Problems solved by technology

The most widely used is the anaerobic-anoxic-aerobic biochemical phosphorus removal and denitrification process. This process is to control the anaerobic-anoxic-aerobic process. By degrading nitrification / denitrification, it is more suitable for phosphorus removal and nitrogen removal. However, in reality, it is difficult for a set of process to achieve the three functions of organic matter removal, nitrogen removal, and phosphorus removal at the same time. Phosphorus removal and nitrogen removal are often contradictory. Complete biological nitrification is the prerequisite for efficient biochemical nitrogen removal. , the lower the biomass per unit area and the longer the residence time, the higher the denitrification efficiency, while the biochemical phosphorus removal requires high biomass per unit area and short residence time. Therefore, the actual sewage treatment effect is often unsatisfactory. Phosphorus denitrification rate is low