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Method and device of composite aeration MBR (membrane bio-reactor)

A technology of compound aeration and aeration holes, applied in the field of compound aeration MBR, can solve the problems of low oxygen transfer rate, poor aeration effect, large aeration energy consumption, etc. The effect of high oxygen efficiency

Active Publication Date: 2014-05-28
GO HIGHER ENVIRONMENT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention proposes a method and device for composite aeration MBR, which solves the problems of poor aeration effect, low oxygen transfer rate and large aeration energy consumption in the existing MBR system

Method used

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  • Method and device of composite aeration MBR (membrane bio-reactor)
  • Method and device of composite aeration MBR (membrane bio-reactor)

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A domestic sewage, raw water COD Cr 400mg / L~500mg / L, after treatment with flat plate MBR, COD Cr Reduced to 20 mg / L~50mg / L, reaching the emission standard.

[0062] The membrane flux of the flat MBR membrane is 20~23L / m 2 h, the dissolved oxygen in the flat MBR membrane tank is 2.5~3.5 mg / L, the air-water ratio is 15:1~17:1, the average cleaning cycle of the flat membrane is more than 6 months, and the energy consumption per ton of water is 0.79KW / h .

Embodiment 2

[0064] An industrial wastewater, raw water COD Cr 500mg / L~800mg / L, after treatment with flat MBR, COD Cr <50 mg / L, meet the discharge standard.

[0065] The membrane flux of the flat MBR membrane is 16~20L / m 2 h, the dissolved oxygen in the flat MBR membrane tank is 3.5~4mg / L, the air-water ratio is 18:1~20:1, the average cleaning cycle of the flat membrane is more than 4 months, and the energy consumption per ton of water is 0.82KW / h.

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Abstract

The invention provides a method and a device of a composite aeration MBR (membrane bio-reactor). The method and the device solve the problems that the existing MBR system is poor in aeration effect, low in oxygen transmissibility and great in aeration energy consumption. The device comprises a membrane pool used for MBR reaction, a membrane component used for intercepting sludge and filtered sewage, a water inlet pump used for providing influent, a micropore aeration pipe used for providing micropore aeration, a blower used for providing gas for the micropore aeration pipe, a jet aerator used for providing jet aeration, a circulating water pump used for circulating water supply of the membrane pool and providing a liquid phase for the jet aerator, and a water outlet pump used for sucking filtered effluent and connected with the membrane component. The device and the method are simple in structure and reasonable in arrangement; a reasonable gas-water ratio can be formed; the transmission efficiency of oxygen is improved; the surface of a membrane is scoured; concentration polarization is avoided effectively; the pollution of the membrane is reduced; the service life of the membrane is prolonged; the energy consumption is saved; and the device and the method are suitable for treatment of large and medium industrial waste water and high-difficulty and degradation-resistant waste water.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a compound aeration MBR method and device. Background technique [0002] Membrane Bio-Reactor (MBR) is a wastewater treatment system that combines a membrane separation unit with a biological treatment unit. The membrane module replaces the terminal secondary sedimentation tank of traditional biological treatment technology, and maintains a high Activated sludge concentration increases organic load in biological treatment. It has the advantages of high treatment efficiency, good effluent quality, compact equipment, small footprint, easy automatic control, and simple operation and management. It can be widely used in the treatment of domestic sewage and various industrial wastewater. [0003] The aeration form of MBR not only directly affects the oxygenation of water, affects the treatment efficiency of the MBR process, but also has a certain impact on energy consumption and membr...

Claims

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Application Information

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IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 陈福泰
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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