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Membrane biological treatment device and method for cooperative treatment of methane and sulfur and nitrogen-containing wastewater

A technology of synergistic treatment and membrane biology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, separation methods, etc., can solve the problem that methane-containing waste gas and sulfur-containing and nitrogen-containing waste water cannot be co-biologically treated, etc. To achieve the effect of compact structure, easy operation and energy saving

Active Publication Date: 2014-08-13
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem that methane-containing waste gas and sulfur-containing and nitrogen-containing wastewater cannot be co-biologically treated, and use the characteristics of gas separation membrane to selectively separate gas and membrane modules to intercept degrading bacteria to combine methane oxidation-sulfate reduction and hydrogen sulfide oxidation- Nitrate denitrification two reaction processes combined

Method used

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  • Membrane biological treatment device and method for cooperative treatment of methane and sulfur and nitrogen-containing wastewater

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Effect test

Embodiment 1

[0039] See figure 1 . Membrane biological treatment equipment for the combined treatment of methane-containing waste gas and sulfur-containing and nitrogen-containing wastewater made of plastic plates. The length, width and height are 1.5m, 0.5m and 1.2m respectively; Filler 3 attached to sulfate-reducing bacteria, circulation oxidation vessel 4 for accommodating methane oxidizing bacteria and sulfate-reducing bacteria suspension solution, gas membrane selective separation vessel 12, upflow regeneration for accommodating Thiobacillus denitrification suspension solution Container 27, solid-liquid separation container 20 and gas diversion container 30.

[0040] The interior of the circulating oxidation vessel 4 is equipped with a partition 34 to divide the circulating oxidation vessel into a fixed reaction zone 2 and a suspension reaction zone 9, and the fixed reaction zone 2 and the suspension reaction zone 9 are arranged on the partition 34 The first liquid diversion port 7 ...

Embodiment 2

[0051] See figure 1 . The combined membrane biological treatment equipment for the co-treatment of methane-containing waste gas and sulfur-containing and nitrogen-containing wastewater has a length, width and height of 4.0m, 2.50m and 1.50m respectively. The equipment structure and the treatment method for waste gas and waste water are the same as in Example 1.

[0052] Under room temperature conditions, the above-mentioned equipment is used to co-process methane-containing waste gas and sulfur- and nitrogen-containing waste water. Filler 3 is housed in the stationary reaction zone 2 of circulation oxidation vessel 4, and filler 3 is bark, and methane oxidizing bacteria and sulfate-reducing bacteria are attached on filler 3, in the suspended reaction zone 9 of circulation oxidation vessel 4 Methane-oxidizing bacteria and sulfate-reducing bacteria were suspended in the solution, and the content of methanotrophic bacteria was 1.0×10 6 CFU / ml, the content of sulfate-reducing b...

Embodiment 3

[0055] See figure 1 . The combined membrane biological treatment equipment for the co-treatment of methane-containing waste gas and sulfur-containing and nitrogen-containing wastewater has a length, width and height of 4.5m, 3.5m and 1.8m respectively. The equipment structure and the waste gas treatment method are the same as in Example 1.

[0056] Under room temperature conditions, the above-mentioned equipment is used to co-process methane-containing waste gas and sulfur- and nitrogen-containing waste water. Filler 3 is housed in the fixed reaction zone 2 of circulation oxidation vessel 4, and filler 3 is the mixture of resin foam and plastic ball, and methane oxidizing bacteria and sulfate reducing bacteria are attached on filler 3, and the suspension in circulation oxidation vessel 4 Methane-oxidizing bacteria and sulfate-reducing bacteria are suspended in the solution in reaction zone 9, and the content of methane-oxidizing bacteria is 1.0×10 9 CFU / ml, the content of s...

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Abstract

The invention relates to a membrane biological treatment device and method for cooperative treatment of methane and sulfur and nitrogen-containing wastewater. The device provided by the invention comprises a gas membrane separation container provided inside with a plurality of gas membrane modules, a circulation type oxidation container for holding a filling material adhered with methane-oxidizing bacteria and sulfate reducing bacteria, and a suspension, an upflow-type regeneration container for holding a supernatant solution containing Thiobacillus denitrificans, a solid-liquid separation container and a gas guiding container. Methane is oxidized and sulfate is reduced in the circulation type oxidation container; separation effect of gas membrane modules make unoxidized methane return to the circulation type oxidation container for continuous oxidization, and make the sulfate reducing product hydrogen sulfide enter into the upflow-type regeneration container and be oxidized by nitrate into sulfate, as a regeneration oxidant; and at the same time, nitrate is reduced into nitrogen, so as to realize cooperative effective treatment of methane exhaust gas and sulfur and nitrogen-containing wastewater in two biochemical reaction zones. The device provided by the invention has the advanategs of compact structure, low energy consumption and simple operation.

Description

technical field [0001] The invention belongs to equipment for co-processing waste gas and waste water by using a bioreactor, in particular to a combined membrane biological treatment equipment and method for co-processing methane-containing waste gas and sulfur-containing and nitrogen-containing waste water. Background technique [0002] In the process of anaerobic sewage treatment, sludge concentration and digestion, and landfill, a large amount of methane is generated along with the generation of odorous substances. Whether it is physical chemical method or biological method, at present, it mainly removes pollutants such as hydrogen sulfide, ammonia and volatile organic acids in malodorous gases, and has little effect on the removal of methane. The concentration of methane in malodorous gas is usually not high, and it is not economical to use it as energy recovery. Usually, the treated gas still containing methane is diluted with air and discharged at high altitude. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B01D53/75B01D53/72B01D53/52
Inventor 李琳席婧茹刘俊新
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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