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Method for increasing methane yield by assisting anaerobic microorganism treatment through electrolysis

An anaerobic microorganism and methane technology, applied in the field of anaerobic biological treatment, to achieve the effect of reducing power, increasing hydrolysis rate, and reducing dilution

Inactive Publication Date: 2017-03-08
CHANGSHA SHANGYI ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] These methods or equipment have improved the stability or output of methane production to a certain extent, but how to produce methane efficiently, quickly and stably using anaerobic digestion technology and widely applicable methods still needs further research

Method used

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  • Method for increasing methane yield by assisting anaerobic microorganism treatment through electrolysis
  • Method for increasing methane yield by assisting anaerobic microorganism treatment through electrolysis
  • Method for increasing methane yield by assisting anaerobic microorganism treatment through electrolysis

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Embodiment 1

[0038] A kind of device that utilizes above-mentioned method to produce methane such as figure 1 As shown, on the anaerobic fermentation reactor 1, an electrolysis device 2 is connected, and a circulation loop 3 is connected at both ends of the anaerobic fermentation reactor 1. The electrolysis device 2 adopts scaly graphite as an electrode, and the electrolysis voltage is 2V. The current density is 0.003A / cm 2 .

Embodiment 2

[0040] A kind of device that utilizes above-mentioned method to produce methane such as figure 2 As shown, a circulation loop 3 is connected to both ends of the anaerobic fermentation reactor 1, and an electrolysis device 2 is arranged on the circulation loop 3. The electrolysis device 2 uses spherical graphite as the electrode, the electrolysis voltage is 6V, and the current density is 0.005A / cm 2 . The electrolysis device can be an ordinary electrolysis cell or a biological electrolysis cell.

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Abstract

The invention discloses a method for increasing methane yield by assisting anaerobic microorganism treatment through electrolysis. According to the method, electrolyzed water is adopted to increase the methane yield, voltage of the electrolyzed water ranges from 1.8V to 12V, a non-precious metal catalytic material such as stainless steel, graphite, a graphite-base material, nickel, steel, metal alloy or metallic oxide is adopted to serve as an electrode material of the electrolyzed water, and a current density of the electrolyzed water is not larger than 0.01A / cm<2>, preferably 0.01-0.05A / cm<2>. The method has the advantages that within an appropriate voltage range, growth of microorganisms cannot be damaged, the methane yield can be increased, and methane quality can be improved; oxygen generated during electrolysis combines with hydrogen sulfide generated during microorganism degradation, so that the hydrogen sulfide is eliminated, and quality of the methane is improved; generated hydrogen combines with carbon dioxide under the action of the microorganisms so as to revert to methane, so that the methane yield is increased, a hydrolysis rate of organisms is increased, and a gas generating rate of the methane is increased.

Description

technical field [0001] The invention relates to the technical field of using anaerobic biological treatment, in particular to a method for increasing methane production by using electrolysis-assisted anaerobic microorganisms. Background technique [0002] Anaerobic biological treatment technology is the process of decomposing complex organic matter into substances such as methane and carbon dioxide through the action of anaerobic microorganisms (including facultative microorganisms) under the condition of no molecular oxygen, also known as anaerobic digestion (Anaerobic Digestion, AD); The fundamental difference with the aerobic process is that molecular oxygen is not used as hydrogen acceptor, but combined oxygen, carbon, sulfur, nitrogen, etc. are used as hydrogen acceptor. This process is usually used to deal with the problem of excessive COD concentration in wastewater (over 152g·COD / L) or to reduce organic solid content in organic solid suspension or slurry (total solid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 蒋颖
Owner CHANGSHA SHANGYI ELECTRONICS TECH CO LTD
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