Multi-point water feeding town sewage treatment system and treatment method thereof

Abstract

The invention provides a multi-point water feeding town sewage treatment system and a treatment method thereof so as to overcome the problems of sludge age contradiction between nitrobacteria and phosphorus-accumulating bacteria and competition for a carbon source among different populations of microbes in a traditional A2 / O process and to improve nitrogen and phosphorus removal effects of process operation. The multi-point water feeding town sewage treatment system provided by the invention comprises a raw water tank. The raw water tank is respectively connected with an anaerobic tank and an anoxic tank through peristaltic pumps; a water outlet of the anaerobic tank and a water outlet of the anoxic tank are connected with an aerobic tank, and a water outlet of the aerobic tank is connected with a sedimentation basin; a nitrification liquid outlet of the aerobic tank is connected with a nitrification liquid return pipe and the anoxic tank through peristaltic pumps; the lower part of the sedimentation basin is respectively connected with a sludge discharge pipe and a sludge return pipe through valves, and the sludge return pipe is connected with the anaerobic tank through one peristaltic pump; the lower part of the aerobic tank is connected with an air compressor through an aerator pipe; and the interiors of the anaerobic tank and the anoxic tank are respectively provided with a stirrer.

Description

technical field [0001] The invention relates to a sewage treatment system and a treatment method thereof, in particular to a multi-point water inflow urban sewage treatment system and a treatment method thereof. Background technique [0002] As the problem of "eutrophication" of water bodies becomes more and more prominent, and the sewage discharge standards become more and more stringent, the urban sewage treatment technology has entered the stage of advanced treatment that not only removes organic matter, but also removes nitrogen and phosphorus. stage. In addition, the C / N ratio of most urban sewage in my country is low, the contradiction between nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria in terms of sludge age during operation, and many other factors have resulted in the effluent of many urban sewage treatment plants failing to meet the "urban sewage Treatment Plant Pollutant Discharge Standards" (GB18918-2002) stipulates the first-cl...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a multi-point inflow urban sewage treatment system and its treatment method, which solves the mud age contradiction between nitrifying bacteria and phosphorus accumulating bacteria in the traditional A2 / O process and the carbon generation between microorganisms of different populations. Source competition problem, improve the nitrogen and phosphorus removal effect of the process operation

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