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Membrane bioreactor and membrane bioreactor membrane pollution control method and device

A membrane bioreactor, control device technology, applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc. cost and other issues, to achieve the effect of reducing membrane fouling, simple structure and easy operation

Active Publication Date: 2018-07-06
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the serious membrane fouling problem, the MBR system needs to be cleaned regularly online or offline, and a large amount of aeration is required to ensure a certain running time. The cleaning and operation process requires a lot of energy and chemicals, which has high energy consumption and potential Problems of secondary pollution and high cost
[0003] In addition, with the continuous improvement of energy and resource recovery requirements, anaerobic MBR has received great attention from scientific researchers in recent years, but it needs to maintain an anaerobic environment during operation, and conventional air aeration cannot be used to control membrane fouling. , the membrane fouling rate is faster and the cost is higher

Method used

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  • Membrane bioreactor and membrane bioreactor membrane pollution control method and device

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Embodiment 1

[0045] A scanning membrane bioreactor membrane pollution control device, including a fluid medium (water or air) injection system, a lifting system and a control system provided with an injection device; the fluid medium injection system includes a water compressor, an air compressor, a rigid connection Pipeline 5, flexible connection pipeline, gas and liquid pipeline switching device 4 and check valve 3, pressure-resistant pipeline and nozzle 10; the lifting device includes a hydraulic or mechanical lifting system, and the fluid medium injection system is fixed on the lifting system. Running and reciprocating up and down; the fluid medium injection system and the lifting system are controlled by the computer of the control system, and the electric control cabinet is designed for manual control. The control content includes injection medium switching, injection pressure adjustment, injection time control, lifting time and speed Control, the number of reciprocating movements of ...

Embodiment 2

[0054] A method for controlling membrane fouling in a membrane bioreactor, suitable for in-situ control of anaerobic MBR membrane fouling, comprising the following steps:

[0055] 1) According to the program design or manual operation, according to the cleaning requirements of the membrane module, the lifting device is opened regularly, the injection system sprays high-pressure water, and the number of reciprocating movements and injection pressure are selected according to the transmembrane pressure difference or optimized operating conditions;

[0056] 2) When the membrane flux and transmembrane pressure difference meet the expected requirements, the reciprocating motion is stopped, and the injection device is reset to the bottom of the MBR system;

[0057] 3) After the injection device is reset, carry out conventional clean water injection, and set the injection intensity according to the activated sludge stirring requirements;

[0058] 4) Conventional cleaning procedures c...

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Abstract

The invention discloses a membrane bioreactor and a membrane bioreactor membrane pollution control device and method. The membrane bioreactor comprises a fluid medium conveying device, an injection device and a movement device, wherein an exhaust port of a gas compressor of the fluid medium conveying device is communicated with an air inlet of a pipeline switching device through a gas conveying pipeline; the gas conveying pipeline is provided with a check valve; a liquid outlet of a liquid pump is communicated with a liquid inlet of the pipeline switching device through a liquid conveying pipeline; the liquid conveying pipeline is provided with a check valve; the injection device comprises an injection pipe and a plurality of nozzles; an inlet of the injection pipe is communicated with anoutlet of the pipeline switching device through a pipeline; each outlet of the injection pipe is provided with one nozzle; the movement device is installed in or out of the MBR (membrane bioreactor);the injection device is arranged on the movement device. According to the membrane bioreactor and the membrane bioreactor membrane pollution control device and method disclosed by the invention, in-situ efficient control on aerobiotic and anaerobic MBR membrane pollution can be met, operation is simple, energy consumption is low, and an application range is wide.

Description

technical field [0001] The invention belongs to the technical field of membrane pollution control of a membrane bioreactor (MBR), and in particular relates to a membrane bioreactor, a membrane pollution control device and a method for a membrane bioreactor. Background technique [0002] At present, there is a serious shortage of water resources, and a large amount of sewage needs advanced treatment. Membrane bioreactor (MBR) has attracted extensive attention from environmental engineering and scientific research circles because of its efficient treatment capacity, excellent effluent quality and highly automated operation process. Due to the serious membrane fouling problem, the MBR system needs to be cleaned regularly online or offline, and a large amount of aeration is required to ensure a certain running time. The cleaning and operation process consumes a lot of energy and chemicals, which has high energy consumption and potential The problem of secondary pollution and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/28B01D65/02
CPCB01D65/02B01D2321/02C02F3/1268C02F3/2853Y02W10/10
Inventor 刘嘉栋高波田畅王磊
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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