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MBR biological film backwashing decontamination method

A biofilm reactor and biofilm technology, applied in the field of MBR biofilm backwashing and decontamination, can solve the problems of not effectively improving the cell population effect in the biofilm, reducing the anti-toxin ability of free cells, and blocking micropores, etc., to achieve The decontamination effect is remarkable, the decontamination effect is better, and the effect of reducing the content of sludge

Inactive Publication Date: 2019-08-30
TIANHE COLLEGE GUANGDONG POLYTECHNIC NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional method cannot effectively improve the group effect of cells in the biofilm, thus reducing the anti-toxin ability of free cells, and the traditional biofilm cannot effectively reduce the sludge content in the sewage after sewage treatment, which improves the sludge treatment. Intensity, resulting in clogged micropores, in addition, conventional biofilms need to be replaced frequently, resulting in higher costs

Method used

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  • MBR biological film backwashing decontamination method
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  • MBR biological film backwashing decontamination method

Examples

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Comparison scheme
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Embodiment 1

[0041] A method for MBR biofilm backwash decontamination comprises the following steps:

[0042] (1) Removal of large suspended matter or floating matter: the sewage first removes suspended matter or floating matter with a particle size greater than 15mm through a grid. The grid is an artificial grid, and the size of the grid is determined according to the water volume. This embodiment Set the water flow rate to 10m 3 / h, the water depth in front of the grid is 0.8m, and the artificial grid should be cleaned regularly. When the amount of grid slag is 0.2m3 / d, use stainless steel carbon steel mechanical rotary grid, and the grid gap is 15mm;

[0043] (2) Sewage adjustment: the sewage after removing suspended matter or floating matter with a particle size greater than 15mm is sent into the adjustment tank through the pipeline. The adjustment tank adopts an underground reinforced concrete structure to build a square plane shape, and the interior is set according to the water qualit...

Embodiment 2

[0050] A method for MBR biofilm backwash decontamination comprises the following steps:

[0051] (1) Removal of large suspended matter or floating matter: sewage first removes suspended matter or floating matter with a particle size greater than 15mm through a grid. The grid is an artificial or mechanical grid, and the size of the grid is determined according to the water volume. Setting water flow in the embodiment is 12m 3 / h, the water depth in front of the grid is 1.0m, the artificial grid should be cleaned regularly, when the amount of grid slag is 0.2m 3 / d, use stainless steel or anti-corrosion carbon steel mechanical rotary grille, the grille gap is 12mm;

[0052] (2) Sewage adjustment: the sewage after removing the suspended matter or floating matter with a particle size greater than 12mm is sent into the adjustment pool through the pipeline. The adjustment pool adopts an underground reinforced concrete structure to build a square plane shape, and the interior is set...

Embodiment 3

[0060] A method for MBR biofilm backwash decontamination comprises the following steps:

[0061] (1) Removal of large suspended matter or floating matter: sewage first removes suspended matter or floating matter with a particle size greater than 15mm through a grid. The grid is an artificial or mechanical grid, and the size of the grid is determined according to the water volume. Setting water flow in the embodiment is 15m 3 / h, the water depth in front of the grid is 1.0m, the artificial grid should be cleaned regularly, when the amount of grid slag is 0.2m 3 / d, use stainless steel or anti-corrosion carbon steel mechanical rotary grille, the grille gap is 15mm;

[0062] (2) Sewage adjustment: the sewage after removing suspended matter or floating matter with a particle size greater than 15mm is sent into the adjustment tank through the pipeline. The adjustment tank adopts an underground reinforced concrete structure to build a square plane shape, and the interior is set acc...

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Abstract

The invention provides a MBR biological film backwashing decontamination method, which comprises: removal of large suspended matters or floating matters, sewage regulation, treatment with a facultative pool, precipitation, flocculation, biological film treatment, and disinfection. According to the present invention, impurities with different particle sizes are filtered out through a stepwise method so as to achieve the excellent decontamination effect, and part of organic matters are decomposed in the facultative pool so as to effectively reduce the odor in the sewage and achieve the short treatment time; by using the MBR biological film backwashing method, the sludge content in the sewage is effectively reduced, the sludge treatment intensity is increased, the detergency is more than 95%,the water quality after the treatment is good, and the biological film decontamination has high safety; by using the nylon ring mud-scraping device, the biological film can have strong adaptability to water quality change, and the raw material cost is low; and the method has advantages of high organic load, low cost, simple steps, easy construction management and significant decontamination effect.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for backwashing and decontaminating MBR biofilms. Background technique [0002] With the rapid development of industry, the improvement of people's living standards, and the development of urbanization, the discharge of municipal sewage is increasing, and the water quality is also changing. New, refractory compounds often appear. These factors may cause problems in the operation of municipal sewage treatment plants, manifested in the fact that the water volume exceeds the treatment capacity of the sewage plant or the effluent water quality is not up to standard, and even sludge bulking and sludge poisoning occur. Every year, there are a large amount of industrial solid waste, domestic waste, waste water, drift dust sedimentation in China, and a certain amount of chemical fertilizers and pesticides are leached into the soil. These pollutants have polluted water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F9/00C02F1/001C02F3/02C02F2001/007C02F1/5236C02F3/1268C02F1/76C02F2303/04C02F2303/02C02F2101/30C02F2303/14
Inventor 李韵涵
Owner TIANHE COLLEGE GUANGDONG POLYTECHNIC NORMAL UNIV
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