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Agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and recovery method thereof

A technology of organic waste and anaerobic fermentation, which is applied in the field of environmental protection engineering and waste resource utilization, can solve the problems of shortening anaerobic fermentation, achieve the effects of alleviating technical bottlenecks, improving rural living conditions, and good substrate environment

Inactive Publication Date: 2014-11-05
HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to address the above problems, to provide a high-efficiency reaction device and anaerobic fermentation method suitable for anaerobic fermentation of agricultural organic waste to recover biogas, and to use the principle and process of two-phase anaerobic biological treatment technology to improve the efficiency of livestock and poultry production. The degradation efficiency of agricultural organic waste such as feces and straw in the anaerobic fermentation process can alleviate the problem of pipeline and equipment blockage caused by refractory substances such as straw, and reduce the fluctuation brought by the low temperature environment in the north to the entire anaerobic fermentation system Interference, improve the operation stability of the system, shorten the time of anaerobic fermentation, and increase the rate of biogas production during anaerobic fermentation

Method used

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  • Agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and recovery method thereof
  • Agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and recovery method thereof
  • Agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and recovery method thereof

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Embodiment 1

[0028]Example 1: Biogas reaction device for anaerobic fermentation of agricultural organic wastes, including an acidogenic fermentation phase reactor 1, a methanogenic phase reactor 9, and a connecting pipeline between the acidogenic fermentation phase reactor 1 and the methanogenic phase reactor 9 The filter device 22 is arranged on the top, and the filter device 22 includes a conical shell, the filter material 23 is arranged in the inner cavity of the shell, the cover plate that can be opened or sealed is set on the top of the shell, and the upper and lower ends of the shell are provided with feeding The horizontal position of the inlet 24 and the outlet 25 and the inlet 24 is lower than the outlet 3 of the acidogenic fermentation phase reactor 1 . The horizontal position of the inlet 24 of the filter device 22 is lower than the outlet 3 of the acidogenic fermentation phase reactor 1 by 2 / 3 of the total height of the acidogenic fermentation phase reactor 1 . The filter mater...

Embodiment 2

[0029] Embodiment 2: Referring to Example 1, the horizontal position of the inlet 24 of the filter device 22 is lower than the distance from the outlet 3 of the acidogenic fermentation phase reactor 1 and the total height of the acidogenic fermentation phase reactor 1 is equal to 25cm.

[0030] The selection of the material of the filter material 23 is a nylon filter screen with a pore size of 2 mm, and its position is located at 1 / 2 of the total height of the filter device 22 . The reaction zone 10 of the methanogenic phase reactor 9 has a height of 650 mm, an inner diameter of 70 mm, and a ratio of height to diameter of 9.3:1. The total volumes of the acidogenic fermentation phase reactor 1, the filtering device 22, and the methanogenic phase reactor 9 are 15L, 5L, and 5L respectively, and the total volume ratio is 3:1:1.

Embodiment 3

[0031] Embodiment 3: The recovery method of biogas reaction device for anaerobic fermentation of agricultural organic waste, comprising the following steps:

[0032] a) After the raw material is pretreated, the total solids concentration is 12%, and it is added to the acid-producing fermentation phase reactor that has been vacuumed and deoxygenated in advance, and the biogas digester is inoculated into the reactor, stirred for 5 minutes every 2 hours, and kept The anaerobic fermentation was run continuously at 37°C until the pH of the fermentation liquid in the reactor decreased from the initial 7.0-7.2 to 6.2-6.5 and remained constant, and the acetic acid in the terminal liquid phase fermentation product dominated, and the raw material was livestock and poultry manure Or the mixture of livestock and poultry manure and crop straw, keeping the total C:N in the raw material at 20-30:1, to obtain acidogenic fermentation products;

[0033] b) The acidogenic fermentation product is...

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Abstract

The invention relates to an agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and a recovery method thereof. The apparatus comprises an acidogenic fermentation phase reactor and a methanogenic phase reactor, a filtering device exists between the acidogenic fermentation phase reactor and the methanogenic phase reactor, wherein the acidogenic fermentation phase reactor adopts a continuous stirred tank reactor, the methanogenic phase reactor adopts an anaerobic expanded granular sludge bed reactor with the ratio of height to diameter of 9:1-10:1, a filtering material made of a nylon filter screen or a polyethylene filter screen is arranged in the filtering device, the aperture size of the filter screen is 0.5-3mm, and a total volume ratio of the acidogenic fermentation phase reactor to the filtering device to the methanogenic phase reactor is 2.5-3.5:1:1. The apparatus and the method can improve the degradation efficiency of agricultural organic wastes in an anaerobic fermentation system, alleviate the bottlenecks of the obstruction technology of equipment and pipelines, reduce the fluctuation interference of northern low temperature environment to the whole anaerobic fermentation system, and improve the running stability and the biogas generation rate of the system.

Description

technical field [0001] The invention relates to a high-efficiency reaction device suitable for anaerobic fermentation of agricultural organic waste to recover biogas and a method for using the device to perform anaerobic fermentation and recovery of biogas, belonging to the fields of environmental protection engineering and waste resource utilization. Background technique [0002] Agricultural organic waste includes various crop straws produced in agricultural production, and livestock and poultry manure produced in livestock and poultry breeding, etc., which is difficult to deal with and is a major problem in environmental governance. Using agricultural organic waste, livestock and poultry manure, straw, etc. as available resources for anaerobic fermentation to recover biogas can not only solve the problem of environmental pollution caused by agricultural production waste, but also produce biogas that can be continuously used as energy, realizing waste The harmlessness, redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/34C12M1/12C12M1/107C12M1/02C12P5/02
CPCC12M21/04C12M23/36C12M23/58C12M27/02C12M29/02C12M41/12C12M41/28Y02E50/30
Inventor 马放鹿晓菲王海东王世伟
Owner HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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