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Method and apparatus of impulse fluid jet type membrane bioreactor

A membrane bioreactor, pulse jet technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as inconvenience in operation, save energy, improve cross-flow rate, run The effect of low energy consumption

Active Publication Date: 2008-10-29
GO HIGHER ENVIRONMENT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the continuous jet aeration, the membrane fouling can only be further controlled by adjusting the aeration volume, and because the gate valve is used to control the circulation pump flow, the operation is inconvenient

Method used

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  • Method and apparatus of impulse fluid jet type membrane bioreactor

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Effect test

Embodiment 1

[0020] Example 1: Small test of food processing wastewater treatment and reuse project, with a treatment capacity of 600m 3 / d, raw water COD cr It is 200~500mg / L, BOD is 100~200mg / L, SS is 150~200mg / L. After the pulse jet type MBR treatment, the effluent COD cr Less than 50mg / L, turbidity less than 1NTU, energy consumption is 0.60kW h / m 3 . The system was operated for one month, the transmembrane pressure difference (TMP) increased from 8kPa to 10kPa, and the membrane pressure difference rose steadily.

Embodiment 2

[0021] Example 2: Domestic sewage treatment and reclaimed water reuse project, the treatment capacity is 2000m 3 / d, raw water COD cr It is 500~1000mg / L, BOD is 150~400mg / L, SS is 200~450mg / L. After the pulse jet type MBR treatment, the effluent COD cr Less than 50mg / L, turbidity less than 1NTU, energy consumption is 0.55kW h / m 3 . The system was operated for 2 months, the transmembrane pressure difference (TMP) increased from 7kPa to 12.6kPa, the membrane pressure difference rose steadily, and the operation was stable.

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Abstract

The invention provides a method of a pulse-jet membrane bioreactor and a device for realizing the method. The method adopts a jet aerator to replace a traditional blower to realize the cross-flow scouring effect of membrane components; wherein, circulating fluid flows through the jet aerator at high speed; air enters the jet aerator in a pulse way by a valve controlled by PLC and jets at the bottom through a gas spreading distributor; the PLC system regulates the cross-flow state of gas-liquid two-phase flow on the membrane surface by changing circulation flow rate and pulse frequency, so as to improve the scouring effect of the air to the membrane surface, to further control membrane pollution, to improve the energy utilization efficiency of a circulating pump and to reserve energy. The use of the jet aerator also increases the utilization efficiency of oxygen and improves sludge degradation effect. The device has the advantages of low operation energy consumption and low operation noise, slight membrane pollution, less early investment in equipment, simple structure of the device, small occupation area, simple and convenient operation and convenience in automatic running and control.

Description

technical field [0001] The invention relates to a method for a pulse jet type membrane bioreactor and a device for realizing the method, belonging to the technical field of sewage treatment and reuse and membrane bioreactors. Background technique [0002] With economic development and population growth, the scale of cities in my country continues to expand, the water consumption continues to increase, and the supply of water resources is increasingly insufficient. The continuous improvement of urbanization level and the rapid development of industry make the water environment pollution more and more serious. In order to solve the problems of water shortage and water environment pollution, many countries have successively carried out research on sewage recycling. Membrane bioreactor (MBR) has received extensive attention due to its excellent and stable effluent quality. The research of MBR began in the 1960s. As a new and efficient sewage treatment technology, after decades...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 陈福泰范正虹麻丽峰邢林林
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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