Membrane-based waste gas biological treatment method and system

A technology for biological treatment and waste gas, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of small gas-liquid mass transfer specific surface area, high investment and operation cost, easy accumulation of excessive gas, etc., and achieve efficient degradation. Microbial metabolic activity, small footprint, not easy to block the effect of gas phase

Active Publication Date: 2021-04-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, relatively mature bioreactors include bio-scrubber and bio-trickling filter. The bio-scrubber has the problems of small gas-liquid mass transfer specific surface area and high investment and operation costs, while the bio-trickling filter is easy to accumulate too much residual sewage. Mud causes gas short circuit
For those VOCs that are easily soluble in water, biofiltration technology has achieved great success at low load and low speed, but for low solubility and low concentration of sulfur-containing odorous organic waste gas, the traditional bioreactor Poor handling

Method used

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  • Membrane-based waste gas biological treatment method and system

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Comparison scheme
Effect test

Embodiment 1

[0098] The membrane-based waste gas biological treatment system used in the embodiment is as figure 1 As shown, follow the steps below:

[0099] (1) Pass the sulfur-containing organic waste gas and oxygen into the gas mixing device and mix evenly, and the pressure of the two gases is 1psi;

[0100] (2) Adjust the concentration of sulfur-containing pollutants (mercapto) after mixing to 2.5g / m 3 , and pass it through the pipeline into the membrane module connected to it;

[0101] (3) Pump the nutrient solution and the sludge from the secondary settling tank of the sewage treatment plant with a VSS of 20g / L into the film hanging film, and run for 4 days to complete the domestication;

[0102] (4) Mix the sulfur-containing organic waste gas and oxygen evenly, the volume ratio of the sulfur-containing organic waste gas and the oxygen is 1:5, the oxygen pressure is 5psi, and the concentration of sulfur-containing pollutants (mercapto) is 0.5g / m 3 , pass into the membrane module o...

Embodiment 2

[0106] The membrane-based waste gas biological treatment system used in the embodiment is as figure 1 As shown, follow the steps below:

[0107] (1) Pass the sulfur-containing organic waste gas and oxygen into the gas mixing device and mix evenly, and the pressure of the two gases is 1psi;

[0108] (2) Adjust the concentration of sulfur-containing pollutants (mercapto) after mixing to 2.5g / m 3 , and pass it through the pipeline into the membrane module connected to it;

[0109] (3) Pump the nutrient solution and the sludge from the secondary settling tank of the sewage treatment plant with a VSS of 20g / L into the film hanging film, and run for 4 days to complete the domestication;

[0110] (4) Mix the sulfur-containing organic waste gas and oxygen evenly, the volume ratio of the sulfur-containing organic waste gas and the oxygen is 1:5, the oxygen pressure is 1psi, and the concentration of sulfur-containing pollutants (mercapto) is 0.5g / m 3 , pass into the membrane module of ...

Embodiment 3

[0114] The membrane-based waste gas biological treatment system used in the embodiment is as figure 1 As shown, follow the steps below:

[0115] (1) Pass sulfur-containing malodorous organic waste gas and oxygen into the gas mixing device and mix evenly, and the pressure of the two gases is 1psi;

[0116] (2) Adjust the concentration of sulfur-containing pollutants (mercapto) after mixing to 2.5g / m 3 , and pass it through the pipeline into the membrane module connected to it;

[0117] (3) Pump the nutrient solution and the sludge from the secondary settling tank of the sewage treatment plant with a VSS of 20g / L into the film hanging film, and run for 4 days to complete the domestication;

[0118] (4) Mix the sulfur-containing organic waste gas and oxygen evenly, the volume ratio of the sulfur-containing organic waste gas and the oxygen is 1:1, the oxygen pressure is 1psi, and the concentration of sulfur-containing pollutants (mercapto) is 5g / m 3 , pass into the membrane mod...

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Abstract

The invention provides a membrane-based waste gas biological treatment method and system. The method comprises the following steps of: (1) mixing and introducing sulfur-containing organic waste gas and oxygen, then introducing a nutrient solution and sludge, and carrying out biofilm culturing and domestication; and (2) after domestication, continuing to introduce the mixed sulfur-containing organic waste gas and oxygen, and carrying out a membrane-loaded microbial reaction. The system comprises a gas mixing device and a membrane-based waste gas biological treatment device. The gas mixing device comprises a mixing device body, an oxygen supply pipeline and a sulfur-containing organic waste gas supply pipeline. The membrane-based waste gas biological treatment device comprises a treatment device body and a plurality of membrane assemblies. The mixing device body is communicated with the membrane assemblies. By adopting bubble-free aeration, the gas mass transfer efficiency is greatly improved, the removal efficiency of gas pollutants with poor water solubility is improved, the removal rate of pollutants reaches 99%, the membrane thickness is adjusted, the metabolic activity of efficient degradation microbial is high, the removal efficiency of sulfur-containing malodorous organic pollutants is high, and the oxygen utilization efficiency is high.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a membrane-based waste gas biological treatment method and system. Background technique [0002] With the rapid development of social economy and the continuous acceleration of urbanization, the problem of environmental pollution has become increasingly prominent. In recent years, the stench produced during industrial manufacturing, garbage treatment, and sewage treatment has seriously plagued the lives of residents, especially the residents around sewage treatment plants and garbage treatment plants complained and suffered unspeakably. Odor emission standards are becoming increasingly stringent. In 1993, my country promulgated the "Odor Pollutant Emission Standards" for odor pollution, which stipulated five kinds of sulfur-containing odor pollution: hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide and carbon disulfide. The boundary discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/48
CPCB01D53/84B01D53/48B01D2251/95B01D2257/306Y02A50/20
Inventor 郑雄武婧陈银广董磊吴瑒
Owner TONGJI UNIV
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