A membrane-based sewage nitrogen and phosphorus removal system

Abstract

The invention discloses a membrane-based sewage denitrification and phosphorus removal system, comprising an anaerobic tank, an aerobic tank, and an aeration membrane reaction tank. The aeration membrane reaction tank includes a tank body, an aeration pipe frame, and a hollow fiber membrane. The aeration pipe frame includes a branch pipe frame and a branch pipe frame, and the hollow fiber membrane wire in a triangular prism structure is arranged on the branch pipe frame; an anaerobic pipe frame is arranged between the inner sides of each adjacent row of branch pipe frames, An aerobic pipe frame is arranged on the inner wall of the tank close to the outside of the hollow fiber membrane, and the anaerobic pipe rack and the aerobic pipe rack are respectively provided with liquid spray heads; the anaerobic tank passes through the anaerobic pipe rack and the pool The aerobic tank is communicated with the tank body through the aerobic pipe frame, and the top of the tank body is sealed and provided with a one-way air outlet. The invention feeds the aerobic zone and the anaerobic zone of the aeration membrane reaction tank pertinently, and carries out the reaction of denitrification and dephosphorization respectively, instead of being limited to the layer-by-layer progressive treatment, and improves the reaction efficiency , has better practicability.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a membrane-based sewage nitrogen and phosphorus removal system. Background technique [0002] In recent years, domestic sewage and industrial sewage contain a large amount of nitrogen and phosphorus, which leads to eutrophication of water bodies. There are even black and odorous phenomena in daily river ditches, causing environmental pollution. There are many reasons for eutrophication of water bodies. In the agricultural field, the use of agricultural nitrogen and phosphorus fertilizers leads to eutrophication of soils, which indirectly enriches agricultural water sources with nitrogen and phosphorus. In the field of industrial production, phosphorus pollutants are discharged with water. [0003] With the improvement of the quality of life, my country has paid more and more attention to environmental issues. The "Plan for Prevention and Control of Water Po...

AI Technical Summary

Problems solved by technology

However, in the process of sewage treatment by membrane bioreactor, sewage treatment is often carried out in a large dyeing tank with uniform sewage mixing. With the sewage treatment, there is a concentration difference on the membrane surface of the membrane bioreactor, and the biochemical reaction takes a long time, which leads to Inefficiency in sewage treatment

Due to the distribution of oxygen on the membrane and the distribution of microbial colonies, once the product supply is not timely during the biochemical reaction, the reaction will be inhibited, and even the bacteria will die, and the uncertainty of the sewage reaction will increase.

Images