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A method for controlling membrane fouling in hmbr

A technology of membrane pollution and population, which is applied in the field of water pollution treatment, can solve problems such as cumbersome operating procedures, and achieve remarkable effects, long operating cycles, and no increase in operating costs

Active Publication Date: 2021-07-06
江苏慧创环境检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to restore the membrane flux, the membrane module will adopt measures such as recoil and chemical cleaning during operation, and the operation procedures are relatively cumbersome

Method used

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  • A method for controlling membrane fouling in hmbr

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The dominant microbial populations in the activated sludge were cultivated as: Proteobacteria (Proteobacteria) accounted for 28% of the total amount of bacteria; followed by Acidobacteria (Acidobacteria) accounted for 13% of the total amount of bacteria; Bacteroides (Bacteroidetes), accounting for 10% of the total number of bacteria.

[0015] At this time, the alpha diversity analysis results of the activated sludge microbial population showed that the chao index was 1058.4, the ace index was 862.6, the shannon index was 4.29, and the simpson index was 0.0142. The richness and diversity of species in the activated sludge were very good. At this time, the dominant microbial populations in the filter cake layer were: the microorganisms with the largest amount were Proteobacteria (Proteobacteria), accounting for 35.4% of the total amount; followed by Bacteroidetes (Bacteroidetes), accounting for 14.2% of the total amount; Is Acidobacteria (Acidobacteria), accounting for 12...

Embodiment 2

[0017] The dominant microbial populations in the activated sludge were cultivated as: Proteobacteria (Proteobacteria) accounted for 45% of the total amount of bacteria; followed by Acidobacteria (Acidobacteria) accounted for 18% of the total amount of bacteria; Bacteroides (Bacteroidetes), accounting for 15% of the total number of bacteria.

[0018] At this time, the Alpha diversity analysis results of the activated sludge microbial population showed that the Chao index was 1072.3, the Ace index was 880.5, the Shannon index was 5.32, and the Simpson index was 0.0156. The species richness and diversity in the activated sludge were very good. At this time, the dominant microbial populations in the filter cake layer were: the microorganisms with the largest amount were Proteobacteria (Proteobacteria), accounting for 37.5% of the total amount; followed by Bacteroidetes (Bacteroidetes), accounting for 13.9% of the total amount; Is Acidobacteria (Acidobacteria), accounting for 12.5%...

Embodiment 3

[0020] The dominant microbial populations in the activated sludge were cultivated as: Proteobacteria (Proteobacteria) accounted for 31.6% of the total amount of bacteria; followed by Acidobacteria (Acidobacteria) accounted for 15.5% of the total amount of bacteria; Bacteroidetes accounted for 11.6% of the total bacteria.

[0021] The alpha diversity analysis results of the activated sludge microbial population at this time showed that the chao index was 1078.4, the ace index was 882.9, the shannon index was 5.19, and the simpson index was 0.0152. The richness and diversity of species in the activated sludge were very good. At this time, the dominant microbial populations in the filter cake layer were: the microorganisms with the largest number were Proteobacteria (Proteobacteria), accounting for 36.1% of the total amount; followed by Bacteroidetes (Bacteroidetes), accounting for 13.4% of the total amount; Is Acidobacteria (Acidobacteria), accounting for 13.0% of the total. Un...

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Abstract

The invention discloses a method for controlling membrane pollution in HMBR. The method is to control membrane pollution in HMBR by cultivating dominant microbial populations in activated sludge, wherein the dominant microbial populations include Proteobacteria, Acidobacteria, and Bacteroides phyla, and the ratios of Proteobacteria, Acidobacteria, and Bacteroides in the total bacterial population gradually decreased. The invention controls the membrane fouling in the HMBR by cultivating the dominant microbial population in the activated sludge, the method is simple, does not increase the operating cost, and at the same time can make the operating period of the membrane module the longest, that is, the membrane fouling degree is the lightest, and the effect is remarkable .

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment, and in particular relates to a method for controlling membrane pollution in HMBR by cultivating dominant microbial populations in activated sludge. Background technique [0002] Install biological filler in the aeration tank of ordinary membrane bioreactor (MBR), after running for a period of time, a layer of biofilm will grow on the filler, such MBR is called composite membrane bioreactor (HMBR), such as figure 1 As shown, the raw water to be treated enters the aeration tank after being lifted by the raw water pump. In the aeration tank, there are activated sludge mixture and biofilm attached to the biological filler. A large number of microorganisms grow on the activated sludge and biofilm. These microorganisms The degradation of organic matter is completed through metabolism; while the membrane module plays the role of solid-liquid separation. Under the suction of the self-pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/00C02F3/12
CPCY02W10/10
Inventor 刘强闫军伟
Owner 江苏慧创环境检测有限公司
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