Biological cathode method of degrading organic matters and recycling energy contained in organic matters

A biocathode and organic matter technology, applied in battery electrodes, electrochemical generators, biochemical fuel cells, etc., can solve the problems of biocathode start-up difficulty, microbial electrolysis cell construction cost reduction, etc., and achieve low-cost rapid construction and operation, construction The effect of cost reduction and solving the difficulty of start-up

Active Publication Date: 2014-01-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a biocathode method that degrades organic matter and reclaims its contained energy, solves the technical problem that the biocathode of the existing microbial electrolysis cell is difficult to start, and reduces the construction cost of the microbial electrolysis cell. Greatly reduce the low-cost and rapid construction and operation of all-bioelectrode microbial electrolysis cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The return sludge of the sewage treatment plant is used as the inoculation source, and the solution containing the organic matter to be treated and the inoculation mixture are used as feed materials. The solution containing the organic matter to be treated is: 4.3mM sodium acetate, 6mM phosphate buffer solution, 310mg / L of ammonium chloride and an appropriate amount of additive M. The solution containing the organic matter to be treated and the inoculum mixture shall be mixed thoroughly at a ratio of 1:5-1:1 by volume, and started at 20°C-35°C under anaerobic conditions with an external DC power supply of 0.2-1.0V In a single-chamber membraneless reactor, the bioanode is started in the state of the electrolytic cell, and the solution containing the organic matter to be treated is regularly replaced to a continuous and stable maximum current value; the biocathode is started in the state of the electrolytic cell, and the described The organic matter solution to be treate...

Embodiment 2

[0036] The return sludge of the sewage treatment plant is used as the inoculation source, and the solution containing the organic matter to be treated and the inoculum mixture are used as the feed material. According to the weight ratio, the solution containing the organic matter to be treated is: 3 parts of sodium acetate, 4 parts of phosphate buffer Solution, 0.3 parts of ammonium chloride and an appropriate amount of additive M, or use 3 parts of propionate, 5 parts of butyrate, 1 part of valerate, 5 parts of ethanol or 3 parts of butanol instead of 3 parts of sodium acetate. The solution containing the organic matter to be treated and the inoculum mixture shall be mixed thoroughly at a ratio of 1:5 by volume, and the single-chamber membraneless membrane shall be started at 20°C-35°C under anaerobic conditions with an external DC power supply of 0.2-1.0V The reactor starts the bioanode in the state of the electrolytic cell, and regularly replaces the organic matter solution ...

Embodiment 3

[0038] The return sludge of the sewage treatment plant is used as the inoculation source, and the solution containing the organic matter to be treated and the inoculum mixture are used as the feed material. According to the weight ratio, the solution containing the organic matter to be treated is: 7 parts of sodium acetate, 10 parts of phosphate buffer Solution, 2 parts of ammonium chloride and an appropriate amount of additive M, or use 4 parts of propionate, 6 parts of butyrate, 4 parts of valerate, 10 parts of ethanol or 6 parts of butanol instead of 7 parts of sodium acetate. The solution containing the organic matter to be treated and the inoculum mixture shall be mixed thoroughly at a volume ratio of 1:1, and the single-chamber membraneless membrane shall be started at 20°C-35°C under anaerobic conditions with an external DC power supply of 0.2-1.0V The reactor starts the bioanode in the state of the electrolytic cell, and regularly replaces the organic matter solution to...

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Abstract

The invention discloses a biological cathode method of degrading organic matters and recycling energy contained in the organic matters. The biological cathode method comprises the following steps: sufficiently mixing organic matters to be treated and inoculation mixed liquor in a proportion of 1:5-1:1 in a single-room film-free reactor; and starting a biological anode and a biological cathode in the single-room film-free reactor under an electrolytic cell state to degrade and recycle the materials. The biological cathode method is operated under liquor electric conductivity of 1.25 mS / cm; current density of an H2-generating biological anode can reach over 2.5 A / m<2-> of the cathode projection area by calculating based on the cathode projection area at a cathode potential of (-)0.9 V (vs SHE); the current density of the optimized biological cathode electrolytic cell can reach over 4.5 A / m<2-> of the cathode projection area; the biological cathode method disclosed by the invention is obviously better than the method in the prior art, so that a technical problem that the biological cathode of an existing microorganism electrolytic cell is difficult to start quickly is solved.

Description

technical field [0001] The invention relates to the field of microbial electrochemistry, in particular to a biocathode method for degrading organic matter and recovering the energy contained therein. Background technique [0002] Biocathode has the characteristics of low investment cost, low operating cost, natural regeneration, and domestication and adaptation. The cathode of the microbial electrolysis cell adopts a biocathode, which can greatly reduce the construction cost and operation cost of the microbial electrolysis cell. At present, there is no mediator-producing H in the world 2 Biocathode research is in its infancy proof-of-concept stage, and the treatment of microbial electrolyzer biocathode has not yet been retrieved. [0003] In 2008, Rozendal et al. first conceptually proved the production of H with a half-cell bioelectrode. 2 Feasibility of biocathodes. First use graphite felt as an electrode to domesticate the mixed bioanode with sodium acetate, and then ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461H01M8/16H01M4/88H01M8/06H01M8/0662
CPCY02E60/527Y02E60/50
Inventor 汤洁娄军芳杨波倪弘昕
Owner JILIN UNIV
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