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Water treatment method for stabilizing water outlet quality

A technology for effluent quality and water treatment, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. It can solve the problems of fluctuation in incoming water volume and deterioration of effluent quality, and achieve stable effluent quality. Effect

Active Publication Date: 2011-06-15
BEIJING GUOHUAN TSINGHUA ENVIRONMENT ENG DESIGN & RES INST CO LTD BEIJING CHINA
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Problems solved by technology

[0006] The purpose of this invention is to propose a new water treatment control method to solve the problem of deterioration of effluent water quality caused by the fluctuation of incoming water in the traditional water treatment process

Method used

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  • Water treatment method for stabilizing water outlet quality
  • Water treatment method for stabilizing water outlet quality
  • Water treatment method for stabilizing water outlet quality

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Embodiment Construction

[0011] In the present invention, the water outlet rate of the membrane bioreactor is kept substantially constant, and the water inlet rate is appropriately changed with the change of the incoming water volume, so that the water level in the reaction tank fluctuates up and down with the change of the incoming water volume.

[0012] In the present invention, since the water outlet rate is basically constant, the water volume treated per unit time is basically constant, so the problem of the quality of the outflow water will not decrease when the inflow water volume increases. It not only simplifies the control method, but also achieves stable water quality. Also, because the water outlet rate of the membrane bioreactor in the present invention is basically constant, the rate is determined by the critical flux of the membrane during design, so as to ensure that the reactor always discharges water under the critical flux condition when the incoming water volume changes.

[0013] I...

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Abstract

The invention provides a water treatment method for stabilizing water outlet quality, which utilizes a membrane bioreactor. The reactor comprises a unit reaction tank and at least one membrane tank. The water outlet rate of the membrane bioreactor is basically kept stable, and a water inlet rate properly varies with the variation of incoming water quantity. Therefore, a water level in the reaction tank fluctuates with the variation of the incoming water quantity. In the method of the invention, the dwelling time of pollutants in water in the bioreactor cannot be shortened even under the condition that the incoming water quantity is increased, so that the water outlet quality is more stably controlled.

Description

technical field [0001] The invention relates to a method for stabilizing outlet water quality when the amount of incoming water fluctuates by using a variable water level membrane bioreactor, including the design and operation mode of the reactor. Background technique [0002] Urban sewage and industrial wastewater contain a large amount of organic pollutants. Direct discharge into water bodies will cause great harm to the environment and affect all aspects of human life. Therefore, municipal sewage and industrial wastewater will be collected by municipal pipe networks in cities. Build corresponding sewage treatment facilities, and transfer the collected sewage to the sewage treatment site for centralized treatment. At present, a common treatment method is to use activated sludge microorganisms to degrade organic pollutants. In this method, when designing process engineering, the ratio of organic pollutants to microorganisms is called the sludge load rate. And use this para...

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Application Information

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IPC IPC(8): C02F3/12C02F3/10
CPCY02W10/10
Inventor 汪诚文
Owner BEIJING GUOHUAN TSINGHUA ENVIRONMENT ENG DESIGN & RES INST CO LTD BEIJING CHINA
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