Denitrification and dephosphorization treatment technology for municipal sewage

Abstract

The invention discloses a denitrification and dephosphorization treatment technology for municipal sewage. The technology comprises the following steps: firstly mixing and stirring after filtering domestic sewage, treating the sewage through an anaerobic reaction pool, an anoxic reaction pool and an aerobic reaction pool successively, entering a disinfecting pool for disinfecting and deodorizing after the sewage is treated to reach a standard, reflowing to the anoxic reaction pool for treating while the sewage does not reach the standard, discharging waste gases generated by the sewage treatment in the anaerobic reaction pool, the anoxic reaction pool and the aerobic reaction pool to the air after treated by an air purifying device, reducing air pollution, discharging the disinfected sewage after precipitating in a precipitating pool, performing dehydration treatment on sludge and feeding water to a mixing pool, and discharging the dehydrated sludge. The technology is low in cost, goodin water treatment effect, rapid in degradation speed, especially high in nitrogen and phosphorus element and organic matter removal rate in the sewage, safe and stable, and extensive in applicationrange, beneficial to promotion and popularization and capable of performing waste gas treatment, reducing secondary pollution and guaranteeing the effect of the sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment process for denitrification and phosphorus removal of urban sewage. Background technique [0002] That is, domestic sewage, industrial wastewater and runoff sewage within urban areas. It is generally collected by urban pipes and channels and should be treated by urban sewage treatment plants before being discharged into water bodies. In addition to containing a large amount of organic matter, germs and viruses in urban sewage, due to the high development of industry, the water volume of industrial wastewater (accounting for about 60-80% of the total urban sewage), the water quality is becoming more and more complex and the pollution of runoff sewage is becoming more and more serious, making urban sewage Contains various types and degrees of various toxic and harmful pollutants. The treatment of urban sewage involves many aspects, and comprehensi...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a treatment process for denitrification and dephosphorization of urban sewage to solve the problem of poor denitrification and dephosphorization effects in the prior art mentioned in the background art, and at the same time, the resource consumption is relatively large, and the pollution gas generated during sewage treatment It is also not handled well, which leads to the problem of air pollution.

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