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Device and method for dry-wet combined anaerobic fermentation for producing biogas

A dry-type anaerobic fermentation and anaerobic fermentation technology, which is applied in the field of dry-wet combined anaerobic fermentation to produce biogas, can solve the problems of small application range and inability to take into account the conversion rate of organic matter and volumetric gas production rate of anaerobic fermentation at the same time , to achieve the effects of wide application range, improved energy conversion rate and high volumetric gas production rate

Pending Publication Date: 2018-03-06
BEIJING ENVIRONMENT ENG TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a device and method for producing biogas by combined dry-wet anaerobic fermentation, to solve the problem that the existing anaerobic fermentation device can only process specific organic waste, has a small scope of application, and cannot take into account the anaerobic fermentation at the same time The problem of organic matter conversion rate and volumetric gas production rate

Method used

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  • Device and method for dry-wet combined anaerobic fermentation for producing biogas
  • Device and method for dry-wet combined anaerobic fermentation for producing biogas
  • Device and method for dry-wet combined anaerobic fermentation for producing biogas

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Embodiment 1

[0031] Such as figure 1As shown, this embodiment provides a device for producing biogas by combined dry-wet anaerobic fermentation, which includes a first pretreatment device 71, a dry anaerobic fermentation tank 1 and a biogas collection device 5, wherein the first pretreatment device 71 An output port 711 is provided, and the dry anaerobic fermentation tank 1 is provided with a feed port 13 , a gas output port 12 and a biogas residue output port 11 . The biogas collection device 5 is provided with a first gas input port 51 and a second gas input port 52. Preferably, the biogas collection device may be but not limited to a biogas cabinet. The output port 711 of the first pretreatment device 71 is connected to the feed port 13 of the dry anaerobic fermentation tank 1, and the gas output port 12 of the dry type anaerobic fermentation tank 1 communicates with the first gas input port 51 of the biogas collection device 5 . The device for producing biogas by combined dry-wet ana...

Embodiment 2

[0040] This embodiment provides another device for producing biogas by combined dry-wet anaerobic fermentation, the structure of which is basically the same as that of Embodiment 1, and only the different parts will be described below.

[0041] Such as figure 2 As shown, in this embodiment, the device for producing biogas by combined dry-wet anaerobic fermentation also includes a sewage treatment device 10 , and the sewage output port 63 of the flocculation decondensation device 6 is connected to the input port 101 of the sewage treatment device 10 . The sewage treated by the sewage treatment equipment 10 can be reused. The reuse of water resources in the anaerobic fermentation process not only saves a lot of water resources, but also reduces the environmental pollution caused by the anaerobic fermentation process, and better protects the environment.

Embodiment 3

[0043] This example provides a method for producing biogas by combined dry-wet anaerobic fermentation. Such as image 3 Shown, the method for dry-wet combined anaerobic fermentation to produce biogas comprises the following steps:

[0044] Step S1, the organic waste with a moisture content not higher than 75% is pretreated by the first pretreatment device 71 to generate the first fermentation raw material, wherein the particle size of the first fermentation raw material is not larger than 30mm, and the moisture content is not higher than 75% , the ash content is not higher than 25% on a dry basis. The first fermentation raw material is transported to the dry anaerobic fermentation tank 1 for dry anaerobic fermentation. Preferably, the first fermentation raw material is transported to the dry fermentation reaction tank through a hydraulic plunger pump or a screw conveyor. The first fermentation raw material undergoes dry anaerobic fermentation to produce biogas and biogas re...

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Abstract

The invention discloses a device and a method for dry-wet combined anaerobic fermentation for producing a biogas. The device for dry-wet combined anaerobic fermentation for producing the biogas comprises first pretreatment equipment, a dry-type anaerobic fermentation tank, biogas collection equipment, material conveying equipment, solid-liquid separation equipment, second pretreatment equipment, awet-type anaerobic fermentation tank, flocculation dehydration equipment and a sludge pump, wherein biogas dregs generated from the dry-type anaerobic fermentation tank are subjected to solid-liquidseparation and are fed into the wet-type anaerobic fermentation tank; and biogas slurry generated from the wet-type anaerobic fermentation tank is subjected to flocculation dehydration and is flown back to the dry-type anaerobic fermentation tank. The device for dry-wet combined anaerobic fermentation for producing the biogas, which is disclosed by the invention, is reasonable in design, simple instructure, relatively high in organic matter conversion rate, relatively high in volume gas generation rate, relatively good in material impact resistance and wide in application range.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a device and method for producing biogas by combined dry-wet anaerobic fermentation. Background technique [0002] Due to different living habits and garbage collection and transportation methods, the municipal solid waste such as domestic garbage in my country is quite different from that in developed countries, and its main characteristics are high organic matter content and high moisture content. Although the domestic waste incineration process has the advantages of good reduction effect and heat recovery and power generation, it is not suitable for incineration due to the high organic components, high moisture content and low net calorific value of domestic waste in my country, and incineration is prone to produce dioxins. cause serious environmental pollution. Using anaerobic fermentation technology to process organic matter in domestic waste can minimize ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/16C12M1/107C12P5/02
CPCC12M21/04C12M21/16C12M23/36C12M23/58C12M33/04C12M45/04C12P5/023Y02E50/30
Inventor 祝金星王小韦刘红霞刘岩王杰伍小兵张晨光何亮张祥李东亮郭昊张兴宇
Owner BEIJING ENVIRONMENT ENG TECH CO LTD
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