Bioelectrochemical reaction device and bioelectrochemical reaction method for producing methane on basis of reinforcement of high-organic-matter and high-ammonia-nitrogen wastewater

A technology of chemical reaction and bioelectricity, which is applied in the field of wastewater treatment technology and bioenergy, can solve the problems of low methane production efficiency and failure to eliminate the poisoning effect of anaerobic microorganisms, and achieve the goal of reducing the concentration of ammonia nitrogen, eliminating the poisoning effect, and improving efficiency Effect

Active Publication Date: 2015-07-01
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] The Chinese invention patent application with the publication number CN102925492A discloses a method for producing methane and acetic acid by reducing carbon dioxide using a bioelectrochemical system. In this method, CO is introduced into the cathode chamber and the anode chamber. 2 Cycle aeration, set the cathode polarization potential -1.05~-1.35V (vs. SHE), use the microorganisms on the cathode to obtain electrons

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  • Bioelectrochemical reaction device and bioelectrochemical reaction method for producing methane on basis of reinforcement of high-organic-matter and high-ammonia-nitrogen wastewater
  • Bioelectrochemical reaction device and bioelectrochemical reaction method for producing methane on basis of reinforcement of high-organic-matter and high-ammonia-nitrogen wastewater
  • Bioelectrochemical reaction device and bioelectrochemical reaction method for producing methane on basis of reinforcement of high-organic-matter and high-ammonia-nitrogen wastewater

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Embodiment 1

[0034] Such as figure 1 As shown, in this embodiment, a bioelectrochemical reaction device utilizing high organic matter and high ammonia nitrogen wastewater to strengthen methane production includes an electrochemical reaction tank 1, and a cation exchange membrane 11 is provided in the electrochemical reaction tank 1, and the cation exchange membrane 11 converts the electrochemistry The tank space of the chemical reaction tank 1 is divided into a first chamber 12 and two second chambers 13 respectively located on both sides of the first chamber 12 .

[0035]In this embodiment, the first chamber 12 is in the shape of a cube (10cm×10cm×10cm), and the second chamber 13 is in the shape of a cuboid (10cm×5cm×10cm).

[0036] An anode 21 is provided in the first chamber 12 , a cathode 22 is provided in the second chamber 13 , and the first power source 2 is connected between the anode 21 and the cathode 22 . In this embodiment, the first power supply is a DC stabilized power suppl...

Embodiment 2

[0044] Utilize the bioelectrochemical reaction device of embodiment 1 to produce methane with high organic matter and high ammonia nitrogen wastewater, comprising the following steps:

[0045] (1) Inject the electrolyte into the first chamber 12 and the second chamber 13, and adjust the pH of the electrolyte in the second chamber 13 to be 10;

[0046] The formula of the electrolyte is:

[0047] K 2 HPO 4 3.4g / L;

[0048] K H 2 PO 4 4.4g / L;

[0049] NaHCO 3 2g / L;

[0050] NH 4 Cl 0.1g / L;

[0051] NaCl 0.5g / L;

[0052] MgSO 4 ·7H 2 O 0.1g / L;

[0053] (2) Connect the second power supply 3, inoculate anaerobic sludge in the first chamber 12, the inoculation concentration is 15g / L, and the microorganisms hang film in the first chamber 12 for 7 days;

[0054] (3) After the film-hanging is completed, connect the first power supply 2, and send the high-organic high-ammonia-nitrogen wastewater from which dissolved oxygen has been removed into the first chamber 12, w...

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Abstract

The invention discloses a bioelectrochemical reaction device and a bioelectrochemical reaction method for producing methane on the basis of the reinforcement of high-organic-matter and high-ammonia-nitrogen wastewater. The device comprises an electrochemical reaction tank provided with cation exchange membranes, wherein the electrochemical reaction tank is divided into first chambers provided with anodes and second chambers provided with cathodes by the cation exchange membranes. The device further comprises an ammonia gas absorption chamber, wherein the first chambers and the second chambers are communicated to the ammonia gas absorption chamber through gas guide tubes respectively; a biological anode and a biological cathode are further arranged in each first chamber. NH4<+1> and H<+1> in the wastewater are migrated into the second chambers by virtue of the cation exchange membranes, thus eliminating the toxic actions of high-concentration ammonia nitrogen on anaerobic microorganisms; the hydrogen generated by the second chambers is charged in the first chambers to provide enough hydrogen to hydrogen-philic methanogens in the first chambers, thus furthest reducing CO2 to methane; 2+N (the number of the second chambers) biological electrodes are contained in the first chambers, thus effectively improving the degradation actions of the electrodes on organic matters, and increasing the yield of methane.

Description

technical field [0001] The invention belongs to the field of wastewater treatment technology and bioenergy, and in particular relates to a bioelectrochemical reaction device and method for enhancing methane production by using wastewater with high organic matter and high ammonia nitrogen. Background technique [0002] During anaerobic fermentation, organic matter is hydrolyzed by anaerobic microbial extracellular enzymes to produce amino acids, fatty acids, and glycerol. The hydrolyzate is then converted into acetic acid and hydrogen under the action of hydrogen-producing acetogenic bacteria. Finally, hydrogenophilic methanogens can convert CO 2 and H 2 Converted to methane, acetophilic methanogens, etc. can decompose acetic acid to produce methane. In the process of methanogenesis, the change of pH has an important impact on methanogens, and it is very necessary to maintain an alkaline environment. However, free ammonia in excessively high concentrations of ammonia nitr...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 冯华军王炎锋梁禹翔沈东升殷峻
Owner ZHEJIANG GONGSHANG UNIVERSITY
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