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, and improved gas-phase mass transfer

Active Publication Date: 2022-07-29
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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0099] (1) The sulfur-containing organic waste gas and oxygen are fed into the gas mixing device to mix evenly, and the two gas pressures are both 1 psi;

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

[0101] (3) Pump the nutrient solution and the sludge from the secondary sedimentation tank of the sewage treatment plant with a VSS of 20g / L together into the 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 sulfur-containing pollutant concentration (mercapto group) is 0.5g / m 3 , pass into the ...

Embodiment 2

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

[0107] (1) The sulfur-containing organic waste gas and oxygen are fed into the gas mixing device to mix evenly, and the two gas pressures are both 1 psi;

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

[0109] (3) Pump the nutrient solution and the sludge from the secondary sedimentation tank of the sewage treatment plant with a VSS of 20g / L together into the 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 1 psi, and the sulfur-containing pollutant concentration (mercapto group) is 0.5 g / m 3 , pass into the ...

Embodiment 3

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

[0115] (1) The sulfur-containing malodorous organic waste gas and oxygen are fed into the gas mixing device to mix evenly, and the two gas pressures are both 1 psi;

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

[0117] (3) Pump the nutrient solution and the sludge from the secondary sedimentation tank of the sewage treatment plant with a VSS of 20g / L together into the 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 sulfur-containing pollutant concentration (mercapto group) is 5g / m 3 , pass ...

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Abstract

The invention provides a membrane-based waste gas biological treatment method and system. The method includes the following steps: 1) mixing and introducing sulfur-containing organic waste gas and oxygen, and then introducing nutrient solution and sludge to form a film and acclimation; 2) after the domestication, continue to introduce mixed sulfur-containing organic waste gas Exhaust gas and oxygen, carry out the membrane-supported microbial reaction. The system includes a gas mixing device and a membrane-based waste gas biological treatment device; the gas mixing device includes a mixing device body, an oxygen gas supply pipeline and a sulfur-containing organic waste gas supply pipeline; the membrane-based waste gas biological treatment device includes a treatment device body and several membrane components; The mixing device body communicates with the membrane assembly. The invention adopts bubble-free aeration to greatly improve the gas mass transfer efficiency, improve the removal efficiency of gas pollutants with poor water solubility, achieve a pollutant removal rate of 99%, and realize the adjustment of the film thickness. The removal efficiency of 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 generated in the process of 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 are full of complaints and miserable. Odor emission standards are becoming more and more stringent. In 1993, my country promulgated the "Odor Pollutant Emission Standards" for odor pollution, which stipulated five types of sulfur-containing odor pollution: hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide and carbon disulfide. Boundary...

Claims

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Application Information

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Patent Type & Authority Patents(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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