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Method of producing biogas through solid fermentation of animal feces

A technology of animal manure and solid-state fermentation, which is applied in fermentation, waste fuel, etc., can solve the problems of large footprint, uneven heat and mass transfer, and large volume, so as to reduce the redox potential, increase the growth rate, and shorten the fermentation process. the effect of time

Inactive Publication Date: 2018-11-06
陈盛联
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional biogas fermentation often uses liquid fermentation, but liquid fermentation has the disadvantages of large volume, large floor area, and more waste.
However, the existing solid fermentation technology has disadvantages such as uneven heat and mass transfer, low fermentation efficiency, and low utilization rate of raw materials, which prevents the promotion and application of solid fermentation technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for solid-state fermentation of animal manure to produce biogas, comprising the following steps:

[0025] 1) crushing the straw cellulose dry matter into small sections with a length of 15 mm to obtain material A;

[0026] 2) Mix animal feces with material A to obtain material B, place material B in a closed container, add deoxidizer and biogas-producing bacteria, mix evenly, and cultivate for 3 days to obtain biogas fermentation base material;

[0027] 3) The biogas fermentation base material, material A, and material B are mixed in a ratio of 1:2:3 and put into the auger mixer and mixed with the biogas-producing bacteria for the first time. After the initial mixing, enter the ribbon mixer for full mixing Uniformly, using animal urine to adjust the water content of the mixture to 60%, to obtain material C;

[0028] 4) Put the material C into the fermentation tank, use the negative pressure generating device to discharge the gas in the fermentation tank, carry...

Embodiment 2

[0032] A method for solid-state fermentation of animal manure to produce biogas, comprising the following steps:

[0033] 1) Crushing the cellulose dry matter of corn stalks with a water content of 10% into small pieces with a length of 15 mm to obtain material A;

[0034] 2) Mix animal feces with material A to obtain material B, place material B in a closed container, add deoxidizer and biogas-producing bacteria, mix evenly, and incubate for 2 to 3 days to obtain biogas fermentation base material;

[0035] 3) The biogas fermentation base material, material A, and material B are mixed in a ratio of 1:4:5 and put into the auger mixer and mixed with the biogas-producing bacteria for the first time. After the initial mixing, enter the ribbon mixer for full mixing Uniformly, using animal urine to adjust the water content of the mixture to 80%, to obtain material C;

[0036] 4) Put the material C into the fermentation tank, use the negative pressure generating device to discharge ...

Embodiment 3

[0040] A method for solid-state fermentation of animal manure to produce biogas, comprising the following steps:

[0041] 1) Crushing the cellulose dry matter of corn stalks with a water content of 10% into small pieces with a length of 1 mm, and fully mixing with sawdust to obtain material A;

[0042] 2) Mix animal feces with material A to obtain material B, which is placed in a closed container, add deoxidizer and biogas-producing bacteria, mix evenly, and incubate for 2 days to obtain biogas fermentation base material;

[0043] 3) The biogas fermentation base material, material A, and material B are mixed in a ratio of 1:2:3 and put into the auger mixer and mixed with the biogas-producing bacteria for the first time. After the initial mixing, enter the ribbon mixer for full mixing Uniformly, using animal urine to adjust the water content of the mixture to 60%, to obtain material C;

[0044] 4) Put the material C into the fermentation tank, use the negative pressure generat...

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PUM

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Abstract

The invention discloses a method of producing biogas through solid fermentation of animal feces. The method is characterized by comprising following steps: (1) grinding straws to obtain a material (A); (2) fermenting animal feces to obtain a basic material for biogas fermentation; (3) mixing the basic material, the material (A) and a material (B) according to a ratio of 1:2-4:3-5 to obtain a material (C); (4) adding the material (C) into a fermentation tank, carrying out anaerobic fermentation, in the primary stage of fermentation, spraying an aspergillus oryzae solution by a high pressure atomization device; spraying water by a high pressure atomization device every 2 to 3 days during the fermentation period so as to keep a wet state of the material (C), every 8-10 days, starting a negative pressure generating device to collect biogas, after biogas is collected, stopping the negative pressure generating device, and then starting a high pressure atomizing device to spray a sodium thiosulfate solution. The method has the characteristics of quick biogas production speed and high biogas yield.

Description

technical field [0001] The invention relates to the technical field of waste utilization. More specifically, the present invention relates to a method for solid-state fermentation of animal manure to produce biogas. Background technique [0002] Under anaerobic conditions, biogas-producing microorganisms use animal manure to produce biogas, a flammable gas. Traditional biogas fermentation often uses liquid fermentation, but liquid fermentation has the disadvantages of large volume, large floor area, and a lot of waste. However, the existing solid fermentation technology has disadvantages such as uneven heat and mass transfer, low fermentation efficiency, and low utilization rate of raw materials, which prevents the promotion and application of solid fermentation technology. Contents of the invention [0003] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages as will be described hereinaft...

Claims

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Application Information

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IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 陈盛联
Owner 陈盛联
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