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Microbial electrolysis two-stage sludge anaerobic digestion device and method for producing methane using the device

A technology of microbial electrolysis and anaerobic digestion, which is applied in the field of improved two-stage anaerobic digestion device and sludge methane production, can solve the problems of low methane production rate, long fermentation cycle, and difficulty in biomass degradation and utilization, and achieves improved The effect of methane production rate, improvement of utilization and removal rate, and shortening of operation period

Active Publication Date: 2016-05-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of long fermentation period, low methane yield and difficult utilization of biomass in the existing excess sludge anaerobic digestion process, and to provide a two-stage microbial electrolysis sludge anaerobic digestion process. Digestion device and method for producing methane using the device

Method used

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  • Microbial electrolysis two-stage sludge anaerobic digestion device and method for producing methane using the device
  • Microbial electrolysis two-stage sludge anaerobic digestion device and method for producing methane using the device
  • Microbial electrolysis two-stage sludge anaerobic digestion device and method for producing methane using the device

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specific Embodiment approach 1

[0026] Specific Embodiment 1: In this embodiment, the microbial electrolysis two-stage sludge anaerobic digestion device is composed of a continuous stirring acid production reactor 1 and an upflow methanogenic reactor 2 assisted by microbial electrocatalysis, and the continuous stirring acid production The reactor 1 is composed of a reactor top cover 11, a reaction inner cylinder 14 and a bottom 3 from top to bottom, and is supported by a bracket 4. Above the reactor top cover 11, there are gas outlet A-19-1 and gas outlet A- 29-2, the top cover 11 and the bottom 3 of the reactor are respectively connected to the reaction inner cylinder 14 through flange A12 and flange B5, the outer wall of the reaction inner cylinder 14 is provided with a water bath insulation interlayer 15, and the lower end of the outer wall of the water bath insulation interlayer 15 is provided with a water bath Interlayer water inlet 6, water bath interlayer water outlet 13 is set on the upper end of the ...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment is different from Embodiment 1 in that the material of the microbial anode 26 is carbon fiber brush, carbon rod, and plate graphite. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the material of the non-biological cathode 25 is stainless steel mesh, carbon fiber, carbon paper, or carbon cloth. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a microbial electrolysis two-section type sludge anaerobic digestion device and a method for producing methane by using the microbial electrolysis two-section type sludge anaerobic digestion device, relating to an improved two-section type anaerobic digestion device and a method for producing methanol from sludge. The purpose of the microbial electrolysis two-section type sludge anaerobic digestion device is to solve the technical problems of long fermentation cycle, low methanol yield and difficult biomass degradation and application in an existing residual sludge anaerobic digestion process. The microbial electrolysis two-section type sludge anaerobic digestion device consists of a continuous stirring type acidogenic reactor and a microbial electrocatalysis assisted upflow methane-producing reactor. The method comprises the following steps: starting a microbial catalytic electrolysis unit; producing acid by fermenting the residual sludge; and producing methanol. According to the microbial electrolysis two-section type sludge anaerobic digestion device and method disclosed by the invention, an acid production stage in a treatment process of the residual sludge only needs 5 to 8 days, a methanol production stage adopts continuous flow operation, the hydraulic retention time can be reduced to less than 1 day, and the operation cycle of sludge anaerobic digestion can be greatly shortened by adopting the device and method disclosed by the invention. The device and method disclosed by the invention belong to the field of sludge anaerobic digestion.

Description

technical field [0001] The invention relates to an improved two-stage anaerobic digestion device and a method for producing methane from sludge. Background technique [0002] With the gradual increase in the construction of urban sewage treatment plants, the output of excess sludge as an associated product of sewage treatment is also increasing rapidly. However, the construction of sludge treatment and disposal facilities in my country is seriously backward, and the environmental problems caused by excess sludge are becoming increasingly prominent. , so how to realize the reduction and recycling of excess sludge has become a widely concerned issue in the field of environment. The anaerobic digestion process is one of the most feasible sludge treatment methods at present. The anaerobic digestion process has the advantages of good treatment effect, good dehydration performance of digested sludge, high-energy biogas generation, and low overall energy consumption of the process. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/04
CPCC02F11/006C02F11/04C02F2303/06Y02E50/30
Inventor 王爱杰郭泽冲刘文宗孙宏扬韩其彤蔡伟伟王羚
Owner HARBIN INST OF TECH
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