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Process for fermenting biogas by using crop straws

A technology for crop straw and biogas fermentation, applied in fermentation, waste fuel, etc., can solve the problems of long service life of desulfurizers, achieve the effects of saving equipment costs and operating costs, high resource utilization, and improving desulfurization efficiency

Inactive Publication Date: 2017-09-15
HEFEI ZEJUN ELECTRICAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a process for fermenting biogas using crop straws. The desulfurizer has a long service life and does not require frequent replacement of the desulfurizer. It can stably remove hydrogen sulfide from the biogas and fundamentally solve the environmental pollution problem caused by hydrogen sulfide. Extend the service life of the biogas fermentation device and output pipeline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A process for fermenting biogas using crop stalks provided in this embodiment includes the following steps:

[0054] (1) Crush the crop straw into a powder with a fineness of 80 mesh and add it to the fermenter. The amount added is 1 / 3 of the capacity of a biogas digester. At the same time, add desulfurizer and methane bacteria to carry out aerobic fermentation. Fermentation generates heat. Use pipelines to transport to biogas digesters;

[0055] (2) Fully stir the fermentation medium raw materials;

[0056] (3) Fill the fermenter with oxygen and control the fermentation temperature at 60°C;

[0057] (4) After aerobic fermentation, the fermented material in the fermenter is taken out, and at the same time, crop straw powder is added to the fermenter, and the above-mentioned aerobic fermentation process of the fermenter is repeated;

[0058] (5) The fermented material taken out of the fermentation tank is added to the first biogas digester through the feed port togethe...

Embodiment 2

[0070] A process for fermenting biogas using crop stalks provided in this embodiment includes the following steps:

[0071] (1) Crush the crop straw into a powder with a fineness of 50 mesh and add it to the fermenter. The amount added is 1 / 3 of the capacity of a biogas digester. At the same time, add desulfurizer and methane bacteria to carry out aerobic fermentation. Fermentation generates heat. Use pipelines to transport to biogas digesters;

[0072] (2) Fully stir the fermentation medium raw materials;

[0073] (3) Fill the fermenter with oxygen and control the fermentation temperature at 65°C;

[0074] (4) After aerobic fermentation, the fermented material in the fermenter is taken out, and at the same time, crop straw powder is added to the fermenter, and the above-mentioned aerobic fermentation process of the fermenter is repeated;

[0075] (5) The fermented material taken out of the fermentation tank is added to the first biogas digester through the feed port togethe...

Embodiment 3

[0087] A process for fermenting biogas using crop stalks provided in this embodiment includes the following steps:

[0088] (1) Crush the crop straw into a powder with a fineness of 60 mesh and add it to the fermentation tank. The amount of addition is 1 / 3 of the capacity of a biogas digester. At the same time, add desulfurizer and methane bacteria to carry out aerobic fermentation. Fermentation generates heat. Use pipelines to transport to biogas digesters;

[0089] (2) Fully stir the fermentation medium raw materials;

[0090] (3) Fill the fermenter with oxygen and control the fermentation temperature at 62°C;

[0091] (4) After aerobic fermentation, the fermented material in the fermenter is taken out, and at the same time, crop straw powder is added to the fermenter, and the above-mentioned aerobic fermentation process of the fermenter is repeated;

[0092] (5) The fermented material taken out of the fermentation tank is added to the first biogas digester through the fee...

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PUM

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Abstract

The invention belongs to the technical field of biogas production, and provides a process for fermenting biogas by using crop straws. The crop straws are crushed into powder with the fineness being 50 to 80 meshes; then, the powder is added into a fermentation tank, and the addition quantity is 1 / 3 of the volume of a biogas pool; meanwhile, desulfurizing agents and methane bacteria are added; aerobic fermentation is performed; the fermentation generates heat to produce heat; the heat is conveyed to the biogas pool by using a pipeline; and then, four rounds of anaerobic fermentation are performed. The process provided by the invention has the advantages that the use period of the desulfurizing agents is long; the frequent replacement of the desulfurizing agents is not needed; hydrogen sulfide in the biogas can be stably removed; the environment pollution problem due to the hydrogen sulfide can be fundamentally solved; and the service life of the biogas fermentation device and the service life of the output pipeline are prolonged. In addition, the heating and the heat insulation are not needed in the fermentation process; the biogas slurry quantity is small, but the quantity of the produced biogas is great; the environment is protected; the efficiency is high; and the applicability to the efficient biogas production process with the relatively small scale is realized. The process has the advantages that the technical flow process is simple; the operation is convenient; the resource utilization rate is high; the equipment cost and the operation cost are reduced; and the desulfurizing efficiency is improved, and the like.

Description

technical field [0001] The invention belongs to the technical field of biogas production, and in particular relates to a process for fermenting biogas with crop stalks. Background technique [0002] Biogas is a flammable gas produced by anaerobic digestion of organic matter. It is a mixture of various gases. Its main component is methane, followed by carbon dioxide, hydrogen sulfide (H 2 S), nitrogen and some other components. In the composition of biogas, combustible components include gases such as methane, hydrogen sulfide, carbon monoxide and heavy hydrocarbons; non-combustible components include gases such as carbon dioxide, nitrogen and ammonia. In the biogas composition, the content of methane is 55%-70%, the content of carbon dioxide is 28%-44%, and the average content of hydrogen sulfide is 0.034%. [0003] Biogas production technology is one of the most important technologies in the biological cycle. At present, crop straws are mainly used for biogas production. ...

Claims

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Application Information

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IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 徐仙峰
Owner HEFEI ZEJUN ELECTRICAL EQUIP CO LTD