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Optimized membrane bioreactor (MBR) back washing method

A membrane bioreactor and backwashing technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as limited, lack of flexibility, and no consideration of energy saving and consumption reduction

Active Publication Date: 2015-11-25
BEIJING JINKONG DATA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current cleaning method is simple and limited, lacks flexibility when operating conditions change, and does not consider energy saving and consumption reduction

Method used

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  • Optimized membrane bioreactor (MBR) back washing method
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  • Optimized membrane bioreactor (MBR) back washing method

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Embodiment Construction

[0060] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0061] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0062] It should be known that the preset threshold value of S involved in this article, the rate of change of transmembrane pressure difference, the rate of change of transmembrane pressure difference and the reference value T of the rate of change of transmembrane pressure difference ref The thresholds or values ​​set in this paper are only reference values, and the values ​​can be set by users themselves.

[0063] The MBR process mostly operates at a constant flux, and the transmembrane pressure gradually increases over time. When the transmembrane pressure reaches a certain c...

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Abstract

The invention discloses an optimized membrane bioreactor (MBR) back washing method. An MBR is operated at constant flux. The method comprises the following steps: I. computing the transmembrane pressure (TMP) of membrane modules of the MBR in a certain period of time; II. computing the similarity S in the certain period of time: specifically, firstly determining the reference value Tref of the TMP and then computing the similarity S by utilizing the TMP according to a formula in the specification; III. comparing the value of S with a preset threshold, washing the membrane modules by an online cleaning mode at different cleaning time if the value of S is not less than the preset threshold, and washing the membrane modules by an online chemical cleaning or offline cleaning mode if the value of S is less than the preset threshold. According to the actual situation of membrane pollution, through low-strength more timely cleaning, pollution of the MBR membrane is eliminated at the initial stage of formation, thus preventing synergistic deterioration effects caused because membrane pollution is not timely recovered, saving energy and time and prolonging the service lives of the membrane modules.

Description

technical field [0001] The invention relates to an optimized method for backwashing a membrane bioreactor. Background technique [0002] MBR membrane bioreactor is a new method of sewage treatment that combines activated sludge method and membrane separation technology, and replaces the secondary sedimentation tank in traditional conventional activated sludge method with membrane separation technology. Compared with the traditional activated sludge method, it has many advantages such as good and stable effluent quality, less residual sludge output, small footprint, easy installation, and convenient operation. At the same time, in the actual application process, there are also some problems, such as easy pollution, relatively short life, high cost, and high energy consumption. In the water treatment process, suspended activated sludge and necrotic microorganisms are easy to foul and block the MBR membrane on the MBR membrane, resulting in a short service life of the MBR memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/12B01D65/02
CPCY02W10/10
Inventor 唐丽娜任艳真刘萌杨斌
Owner BEIJING JINKONG DATA TECH
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