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Method for quickly granulating aerobic activated sludge in membrane bioreactor

A membrane bioreactor and sludge granule technology, applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc., can solve the problem of long sludge granulation process and difficulty in maintaining high performance of membrane bioreactor and other problems, to achieve the effect of eliminating membrane fouling, shortening processing time, and broad application prospects

Inactive Publication Date: 2014-07-16
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned defects of the prior art, the first object of the present invention is to provide a device for rapid granulation of aerobic activated sludge in a membrane bioreactor, to solve the problem that the sludge granulation process in the existing device is long and difficult to maintain Defects of Membrane Bioreactor High Performance
[0007] The second purpose of the present invention is to provide a method for rapid granulation of aerobic activated sludge in a membrane bioreactor, to solve the defects of the existing method that the sludge granulation process is long and difficult to maintain the high performance of the membrane bioreactor

Method used

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  • Method for quickly granulating aerobic activated sludge in membrane bioreactor
  • Method for quickly granulating aerobic activated sludge in membrane bioreactor

Examples

Experimental program
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Effect test

Embodiment 1

[0025]The aerobic activated sludge was pre-acclimated in the sequencing batch tubular reactor SBR for 2 days, and then the activated sludge solution was quickly transferred to the membrane bioreactor through the connecting pipeline, so that the chemical oxygen demand (COD) concentration was The simulated domestic sewage with 350mg / L, ammonia nitrogen concentration of 18mg / L, and pH of 6.86 continuously enters the membrane bioreactor; through the following settings: the membrane filter outlet pump (13) operates intermittently, pumping for 10 minutes and stopping for 8 minutes; After the air pump (7) was aerated for 172 minutes, it was stopped for 8 minutes; the supernatant liquid drainage pump (10) was stopped for 177 minutes and then operated for 3 minutes to perform intermittent operations of membrane filtration, aeration and supernatant discharge. After the membrane bioreactor has been in operation for 14 days, the aerobic activated sludge in it is granulated to form aerobic ...

Embodiment 2

[0028] The aerobic activated sludge was pre-acclimated in the sequencing batch tubular reactor SBR for 5 days, and then the activated sludge solution was quickly transferred to the membrane bioreactor through the connecting pipeline, so that the chemical oxygen demand (COD) concentration was The simulated domestic sewage with 525 mg / L, ammonia nitrogen concentration of 26 mg / L, and pH of 7.0 continuously enters the membrane bioreactor; the following settings are used: the membrane filter outlet pump (13) operates intermittently, pumping for 10 minutes and stopping for 8 minutes; aeration After the pump (7) was aerated for 150 minutes, it was stopped for 5 minutes; the supernatant liquid drainage pump (10) was stopped for 130 minutes and then operated for 4 minutes to perform intermittent operations of membrane filtration, aeration and supernatant discharge. After the membrane bioreactor has been in operation for 11 days, the aerobic activated sludge in it is granulated to form ...

Embodiment 3

[0031] The aerobic activated sludge was pre-acclimated in the sequencing batch tubular reactor SBR for 7 days, and then the activated sludge solution was quickly transferred to the membrane bioreactor through the connecting pipeline, so that the chemical oxygen demand (COD) concentration was Simulated domestic sewage with 478 mg / L, ammonia nitrogen concentration of 61 mg / L, and pH of 7.1 continuously enters the membrane bioreactor; the following settings are used: the membrane filter outlet pump 13 operates intermittently, sucks for 6 minutes and stops for 6 minutes; aeration pump 7 After aeration for 100 minutes, stop for 5 minutes; supernatant liquid drainage pump 10 stops for 60 minutes, run for 3 minutes, perform intermittent operation of membrane filtration water, aeration and supernatant discharge. After the membrane bioreactor has been in operation for 9 days, the aerobic activated sludge in it is granulated to form aerobic activated sludge particles, and the membrane bi...

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Abstract

The invention discloses a device and a method for quickly granulating aerobic activated sludge in a membrane bioreactor. The device comprises a sequencing batch type tubular reactor SBR (Styrene Butadiene Rubber) and the membrane bioreactor which are mutually communicated. The method comprises the following steps: preliminary training the aerobic activated sludge in the sequencing batch type tubular reactor for 2-15 days, directly and quickly transferring the preliminary-trained aerobic activated sludge into the membrane bioreactor, continuously adding sewage into the membrane bioreactor, and respectively carrying out intermittent operation on membrane filtering and water going-out, aeration and supernatant discharge at the same time; and granulating the aerobic activated sludge inside the membrane bioreactor after the membrane bioreactor runs for 7-14 to prepare the granulated aerobic activated sludge internal circulation type membrane bioreactor. The preparation method disclosed by the invention has the beneficial effects that the quick granulation of the aerobic activated sludge in the membrane bioreactor can be realized, the membrane pollution of the membrane bioreactor is effectively reduced or eliminated, the defect caused by frequently cleaning a membrane component by adopting a physical or chemical method is overcome, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a device and method for rapid granulation of aerobic activated sludge in a membrane bioreactor. Background technique [0002] Bioreactor is a device that uses biocatalyst to provide a good reaction environment for cell culture, enzyme reaction, and sewage treatment. Bioreactor is the key equipment in the process of biological reaction. Quality and conversion, as well as energy consumption of the bioreactor have a strong influence. Membrane bioreactor is a new sewage treatment technology that combines membrane technology and biochemical reaction technology. It is one of the most promising sewage treatment technologies at present. During the operation, the membrane bioreactor can realize the rapid degradation of organic matter in the sewage by maintaining a high biomass. Compared with the process, the membrane bioreactor has outstanding advantages such as good effluent quality, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 张远洋王乾龙王艳辉
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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