Sewage disposal system combining membrane bioreactor and phosphorus recovery and processing method

A technology of membrane bioreactor and sewage treatment system, which is applied in the direction of osmosis/dialysis water/sewage treatment, anaerobic digestion treatment, etc. It can solve the problems of sewage with poor denitrification treatment effect and phosphorus waste, so as to improve the effect of phosphorus release Effect

Inactive Publication Date: 2009-03-11
BEIJING SOUND ENVIRONMENTAL ENG
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Problems solved by technology

[0003] The embodiment of the present invention provides a sewage treatment system and treatment method combining membrane bioreactor and phosphorus recovery, which can effectively treat the pollutants in the water body, save the sedimentation tank in the traditional process, and can remove the pollutants in the water body Phosphorus is recycled to overcome the shortcomings of the existing sewage treatment process, such as poor denitrification effect and serious waste of phosphorus in sewage

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  • Sewage disposal system combining membrane bioreactor and phosphorus recovery and processing method

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Embodiment 1

[0029] This embodiment provides a sewage treatment system that combines membrane bioreactor and phosphorus recovery. This system can effectively recover phosphorus while removing nitrogen and phosphorus from sewage. Specifically, it is as follows figure 1 shown, including:

[0030] The biological treatment subsystem and the phosphorus recovery subsystem are two parts; wherein, the biological treatment subsystem is connected by the anoxic tank 2 and the membrane bioreactor 4 to form a biological treatment section for sewage, and the sewage inlet of the anoxic tank 2 is connected to the The sewage supply pipe 1 that introduces the treated sewage is connected; the phosphorus recovery subsystem is connected in turn by the mixing tank 6, the anaerobic phosphorus release tank 7, the mixing reaction tank 8, and the sedimentation tank 9 to form a phosphorus recovery section for the sewage;

[0031] The sludge mixture outlet of the membrane bioreactor 4 of the biological treatment subs...

Embodiment 2

[0038] In this embodiment, a sewage treatment method based on the system described in Embodiment 1 is provided, which specifically includes:

[0039] The treated sewage enters the biological treatment subsystem for treatment, and denitrification and denitrification are carried out in the anoxic tank to remove some organic matter. Nitrification reaction and partial organic matter degradation, part of the treated sewage is filtered by the ultrafiltration membrane module and discharged as good water, and the remaining sewage and sludge are discharged into the phosphorus recovery subsystem;

[0040] In the mixing tank of the phosphorus recovery subsystem, the sewage and sludge discharged from the membrane bioreactor are mixed, so that the nitrate nitrogen present in the mixed solution is first denitrified in the mixing tank in the anoxic state to eliminate the nitrate nitrogen Adverse effects on the subsequent anaerobic phosphorus release, and the introduction of sewage that has not...

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Abstract

The invention discloses a sewage disposal system and a sewage disposal method for combination of a membrane reactor and phosphor recovery. The system comprises a biological treatment subsystem and a phosphor recovery subsystem, wherein the biological treatment subsystem is formed by connecting an anoxic tank and a membrane reactor; a sewage inlet of the anoxic pond is connected with a sewage supply pipe for introducing sewage to be treated; the phosphor recovery subsystem is formed by connecting a mixed tank, an anaerobic phosphor release tank, a mixed reaction tank and a settling tank in turn; and a sludge miscible liquor outlet of the membrane bioreactor of the biological treatment subsystem is communicated with a water inlet of the mixed tank of the phosphor recovery subsystem. The system solves the problem that the sludge age required for biological denitrogenation and dephosphorization in the prior sewage disposal system is conflicted with each other, and can meet the demand of not only effectively performing denitrogenation and dephosphorization but also recovering phosphor for reutilization to the maximum degree under the condition of sewage disposal.

Description

technical field [0001] The invention relates to a sewage treatment technology, in particular to a sewage treatment system and a treatment method utilizing a membrane bioreactor (MBR) combined with a phosphorus recovery process. Background technique [0002] Phosphorus is an important factor for eutrophication of water bodies, and it is also an element that has a nearly one-way cycle in nature. Due to the mining of phosphate rock and the almost one-way cycle of phosphorus in nature, phosphorus resources are increasingly depleted. Appropriate treatment technology and effective recovery methods can not only effectively control the eutrophication of water bodies, but also obtain available phosphorus resources, which is of great significance to prolong the service life of phosphorus rock resources. There are three main methods for removing phosphorus nutrients in the existing technology, namely chemical method, biological method and biochemical method. Chemical methods can effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F1/44
Inventor 李天增王发珍王凯申欢王建泰吴迪
Owner BEIJING SOUND ENVIRONMENTAL ENG
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