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Energy-saving sewage treatment method by membrane biological reactor (MBR) process

A sewage treatment method and sewage technology, applied in aerobic and anaerobic process treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problem of wasting high-quality carbon sources of raw sewage

Inactive Publication Date: 2011-04-20
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the traditional process, not only did not make good use of the 5-10mg / L DO in the reflux mixture of the MBR membrane pool, but also required more carbon sources to digest, so as to prevent it from being unfavorable to the subsequent phosphorus and nitrogen removal and wasting High-quality carbon source in raw sewage

Method used

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  • Energy-saving sewage treatment method by membrane biological reactor (MBR) process
  • Energy-saving sewage treatment method by membrane biological reactor (MBR) process
  • Energy-saving sewage treatment method by membrane biological reactor (MBR) process

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Embodiment Construction

[0026] Such as figure 2 As shown, the pretreated sewage is treated through the anaerobic pool, the anoxic pool, the aerobic pool, and the pre-anoxic pool in turn, and then enters the MBR membrane pool for treatment. Return to the aerobic tank, the mixed liquid generated in the pre-anoxic tank is returned to the anaerobic tank, air is blown into the aerobic tank, and air is blown into the MBR membrane tank.

[0027] The relevant data of the sewage treatment process are shown in Table 1.

[0028] Table 1 Relevant data in the process of sewage treatment

[0029]

[0030] In this scheme, the mixed solution of the MBR membrane pool is refluxed to the aerobic tank first, and the DO in the refluxed mixed solution can be fully utilized. The gas-water ratio in the aerobic tank is 6:1-7:1, which can reduce the The amount of blast aeration; adding a pre-anoxic tank after the aerobic tank can reduce the DO in the effluent of the pre-anoxic tank to below 0.5mg / L, so that the mixed so...

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Abstract

The invention discloses a sewage treatment method which comprises the following steps: treating sewage after pre-treatment through an anaerobic pond, an anoxic pond, an aerobic pond and a pre-anoxic pond, then enabling the sewage to enter a membrane biological reactor (MBR) membrane pond to be treated, and discharging the sewage. By adopting the sewage treatment method provided by the invention, by additionally arranging the pre-anoxic pond in the traditional A2O+MBR process flow and changing the refluxing pattern, carbon sources can be saved, blast aeration amount can be reduced, and energy consumption can be reduced by more than 10%.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to an energy-saving MBR process for treating sewage. Background technique [0002] In recent years, with the improvement of national requirements for the effluent water quality of sewage treatment plants, the research and application of MBR membrane reaction technology in sewage treatment has attracted more and more attention and promotion. MBR (membrane biological reactor, membrane bioreactor) membrane reaction technology is a membrane separation process (between microfiltration and ultrafiltration), replacing the secondary sedimentation tank and advanced water treatment facilities in the traditional activated sludge method Treatment technology, compared with other traditional biological water treatment processes, MBR membrane reaction technology has the following main characteristics: [0003] 1. It can make the effluent quality high and stable; because the pore size of the membran...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30
Inventor 胡龙张善发徐连军周传庭戴栋超张显忠
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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