Domestic sewage treatment process

Abstract

The invention discloses a domestic sewage treatment process which comprises the following steps: S1, adding domestic sewage into a sedimentation basin, controlling a sludge concentration to be 1200-1600mg / l, and controlling dissolved oxygen to be 2-4mg / l; S2, gathering clarified liquor on the upper part of the sedimentation basin in a collecting tank, stirring for 20-30 minutes, adding a sewage treatment agent while stirring, adding an oxidizing agent, a coagulant aid and a flocculating agent into the collecting tank to kill bacteria in the sewage, and coagulating charged particles in the sewage so as to form floccules; and S3, precipitating the domestic sewage obtained in the S2, filtering the sewage after precipitation, and filtering to remove the residues and floccules in the domestic sewage. Compared with the traditional technology, the domestic sewage treatment process provided by the invention has the advantages that the sewage is treated by virtue of three process steps of filtration, collection and disinfection, water discharge or the quality requirement of the recycled water can be met, the impurities and high salinity components in the sewage can be effectively separatedso as to be fully recycled, and the influence of the domestic sewage on the environment is prevented.

Description

technical field [0001] The invention belongs to the technical field of domestic sewage treatment, and in particular relates to a domestic sewage treatment process. Background technique [0002] Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. [0003] According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage and medical sewage, etc., while domestic sewage is sewage produced in daily life, which refers to a complex mixture of various forms of inorganic and organic substances, including: floating and suspended solid particles of large and small sizes; colloidal and Gel-like diffuser; pure solution...

AI Technical Summary

Problems solved by technology

[0005] Domestic sewage treatment is the process of making sewage meet the water quality requirements of a certain water body for drainage or reuse, and purifying it, which can effectively save water and energy and benefit human beings, but the sewage treatment methods in the prior art are not as good as It is desirable that most of the traditional domestic sewage is directly discharged, causing serious damage to water resources.