Treatment method of urban domestic sludge sewage

Abstract

The invention discloses a method for treating urban domestic sludge sewage, and belongs to the technical field of sludge sewage treatment. According to the treatment method, sludge-containing sewage is precipitated, and then treatment is carried out in two working sections. In a sewage treatment working section, pressurized air flotation treatment is performed to remove fine suspended solids in a water body, adjustment is performed in an acidification adjusting tank, denitrification reaction is performed in an anaerobic tank to remove carbon and nitrogen-containing organic matters, and COD is removed in an aerobic tank in sequence. The working section can effectively remove suspended solids and various organic impurities in sewage without adding chemical agents such as a flocculating agent, and is environment-friendly and safe. In a slurry treatment section, flocculation and fermentation are sequentially carried out by using a microbial treatment agent in a microbial treatment tank, a surfactant and a dehydrating agent are used in a stirring tank, and then mechanical dehydration is carried out, so that the condition that the sludge is easy to harden in a drying process can be improved, and the water content of a final sludge cake is greatly reduced.

Description

technical field [0001] The invention relates to a method for treating sludge and sewage, in particular to a method for treating urban domestic sludge and sewage, and belongs to the technical field of sludge and sewage treatment. Background technique [0002] In the treatment of sewage containing sludge in the prior art, most of the methods of sedimentation, flocculation and pressure filtration are used to separate liquid and solid. The separation effect of liquid and solid in the filter press process is not very obvious, and the generated sludge has a particularly high water content and is easy to harden during the natural drying process, which is not conducive to direct use for other purposes; at the same time, the sewage treatment process is cumbersome and complicated , more energy consumption. Therefore, it is necessary to propose a treatment method that can effectively reduce the amount of chemicals used and at the same time ensure the treatment effect of sewage and slu...

AI Technical Summary

Problems solved by technology

[0002] In the treatment of sewage containing sludge in the prior art, most of the methods of sedimentation, flocculation, and pressure filtration are used to separate liquid and solid. The separation effect of liquid and solid in the press filtration process is not very obvious, and the water content of the generated sludge is particularly high and it is easy to harden during the natural drying process, which is not conducive to direct use for other purposes; at the same time, the sewage treatment process is cumbersome and complicated , more energy consumption