A kind of membrane aeration bacteria and algae biofilm system and its application

Abstract

The invention relates to a membrane aeration bacteria-algae biological membrane system and application thereof. The system comprises a reactor, an aeration diffuser arranged in the reactor, an aeration membrane fixed on the aeration diffuser and a sewage circulating unit arranged on the reactor, wherein a water inlet pipe is arranged at the bottom of the reactor, a water outlet pipe is arranged at the top of the reactor, an air inlet pipe is arranged at the bottom of the aeration diffuser, an air outlet pipe is arranged at the top of the aeration diffuser, and microorganisms and microalgae grow on the aeration membrane. The system is used for synchronously removing the organic matter, nitrogen and phosphorus in sewage. The membrane aeration bacteria-algae biological membrane system is simple and compact in overall structure, stable in structure, good in adjusting flexibility, capable of synchronously and efficiently removing the organic pollutants, nitrogen and phosphorus in sewage in the sewage, economical and practical, and promising in application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and relates to a membrane aeration bacteria and algae biofilm system and its application. Background technique [0002] The traditional sewage biological treatment technology mainly uses microbial metabolism to remove pollutants. The removal of nitrogen and phosphorus is mainly realized by using the characteristics of anaerobic phosphorus release and aerobic phosphorus uptake by nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria. For example, the traditional activated sludge method uses aerobic microorganisms to degrade organic matter to produce carbon dioxide and water, and at the same time synthesizes organisms; uses nitrifying and denitrifying bacteria to convert nitrogen into nitrogen gas; uses phosphorus accumulating and phosphorus releasing bacteria to remove phosphorus. [0003] However, the main disadvantages of traditional sewage biologica...

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Problems solved by technology

[0003] However, the main disadvantages of traditional sewage biological treatment technology include: long sewage treatment cycle, large reaction tank volume, large aeration volume, more equipment, complicated operation, high cost, and a large amount of sludge that is difficult to treat etc., which has become the technical development bottleneck of the traditional sewage treatment process

Although the energy consumption is reduced, it is difficult to achieve efficient sewage treatment. At the same time, an aeration contact oxidation tank is added after the bacteria and algae treatment system, which also faces the low utilization rate of oxygen.

[0007] However, the above-mentioned inventions all use aeration with bubbles, which cannot avoid the contact and friction between the bubbles and the biofilm to destroy the biofilm. At the same time, the utilization rate of oxygen is low, and the symbiosis system of bacteria and algae cannot realize the efficient treatment of sewage.

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