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Double-circulating ceramic membrane bioreactor

A bioreactor, bioreactor technology, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Membrane fouling and operating energy consumption, etc., to achieve the effect of strengthening biochemical effects and low cost

Inactive Publication Date: 2009-08-12
JIUJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the influence factors considered by these methods are complex and changeable, coupled with the different properties of different wastewaters, it is quite difficult to obtain an optimal treatment mode through these methods
Therefore, these methods cannot fundamentally solve the problems of membrane fouling and operating energy consumption.

Method used

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  • Double-circulating ceramic membrane bioreactor
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  • Double-circulating ceramic membrane bioreactor

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example

[0025]Example: domestic sewage treatment in a residential area

[0026] Use the above-mentioned device to treat domestic sewage and COD of sewage in a community cr is 250~350mg / l, ammonia nitrogen is 40~60mg / l, and the effective reaction volume of biological reaction pool 11 of this device is 0.2m 3 Control the temperature of the bioreactor to about 30°C. The filter membrane element is a single-channel ceramic membrane tube with a tube length of 0.8m, an inner diameter of 9mm, an outer diameter of 13mm, and a membrane pore size of 0.8μm. Granular activated carbon is used as a biological filler, and the specification is 10mm×10mm×10mm. The suction negative pressure is stable at 0.08MPa, and the backwash gas velocity (corrected) is stable at 6L / min. The backwash aeration and suction filtration operations of the two membrane modules are switched every hour, and the effluent water quality indicators are monitored every 20 minutes. The monitoring results show that: effluent COD ...

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Abstract

The invention relates to a bicirculating ceramic membrane bioreactor which comprises a biological reaction tank internally installed with biological packing and a membrane module; wherein, both sides of the bottom of the biological reaction tank are symmetrically and respectively provided with the membrane module; the left and the right of the lower part of the biological reaction bank are symmetrically provided with two inverted pyramid bodies; the middle part of the biological reaction bank is vertically provided with a plate washer, the upper end and the lower end of the plate washer are provided with sieve meshes at intervals; thereby, the on-line back washing of the ceramic membrane pipe and the aeration of the biological reaction tank are reasonably and effectively coupled; namely, in the regeneration process of the on-line back washing of the ceramic membrane pipe, not only oxygenation and aeration can be carried out, but also both of the interior and the exterior of the biological reaction tank can form circular flow state to intensify the biochemistry effect; and meanwhile, the clean water is obtained; in addition, by alternately switching the back-washing aeration and suction filtration operation, the bioreactor can continously and stably run again and again. The bioreactor is characterized by high efficiency, energy-conserving, low cost and the like and is suitable for the effective treatment of the multiple waste waters.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a double-cycle ceramic membrane bioreactor. Background technique [0002] Membrane bioreactor, as a new type of efficient wastewater treatment technology, is becoming increasingly active in the field of water treatment, and has been gradually applied to the treatment and reuse of municipal sewage and industrial wastewater. This technology effectively combines membrane separation technology and sewage biological treatment technology to form a new wastewater treatment process. The membrane separation device in this process is equivalent to the secondary settling tank in an ordinary bioreactor, which performs solid-liquid separation, and the retained sludge returns to the bioreactor to infiltrate clean water. Membrane bioreactor has the advantages of high wastewater treatment efficiency, compact structure, small footprint, high volume loading rate, less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
Inventor 杨涛杨期勇李国朝刘祥丽
Owner JIUJIANG UNIVERSITY
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