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Marsh gas fermentation process with composite microbial prepn pre-treated stalk

A compound bacterial agent and biogas fermentation technology, which is applied in the direction of microorganism-based methods, fermentation, biochemical equipment and methods, can solve the problems of fast fermentation speed and gas production speed, and shorten the initial gas production time, and achieve fast fermentation speed , reduce the economic burden, the effect of fast biogas production rate

Inactive Publication Date: 2010-04-07
北京合百意生态能源科技开发有限公司 +1
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a biogas fermentation method for pretreatment of stalks with composite bacterial agents, which effectively overcomes the defects in the prior art that affect the production of biogas due to insufficient raw materials or poor fermentation. Rod fermentation speed and gas production speed are fast, which shortens the initial gas production time by about 50% and increases the gas production rate by more than 30%. Under the condition of poultry and livestock manure, all straw can be used to generate biogas, which has a wide range of applications

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0024] Embodiment 1 Using compound bacterial agent to pretreat straw to produce biogas by wet anaerobic fermentation

[0025] Using compound bacterial agent to pretreat straw to produce biogas was first tested in Yongan, Shuangliu, Sichuan. 800kg of crushed corn stalks were added to 960kg of water to moisten for 18 hours; 2kg of compound bacterial agent and 4.0kg of ammonium bicarbonate were added, and the two raw materials were added to the water, and then Add 680kg of water again, add inoculum agent, ammonium bicarbonate and water while mixing, so that inoculum agent and ammonium bicarbonate are mixed evenly, and after mixing, collect into stacks with a height of 1.2 meters and a width of 1.5 meters. Bamboo poles are perforated for ventilation and covered with plastic sheeting. On the third day of retting, the temperature reaches above 60°C. On the fourth day, 800kg of stacked materials are put into two biogas digesters respectively, and ammonium bicarbonate 4.0 is added to e...

Embodiment approach 2

[0026] Embodiment 2 Using compound bacterial agent to pretreat straw anaerobic dry fermentation to produce biogas

[0027] In Lisuihe Baiyi Base in Shunyi, Beijing, several tests were carried out on straw pretreatment with compound bacteria and its biogas production methods, that is, three raw materials tests of corn straw, rice straw and wheat straw, and wet biogas production and anaerobic dry fermentation tests.

[0028] The straw and wheat straw are cut into more than 6cm by mechanical cutting, each 600kg of straw and wheat straw is firstly moistened with water, each with 640kg of water, and moistened for 20 hours. After wetting, add compound bacteria agent and ammonium bicarbonate respectively. Add 0.32kg of compound bacterial agent for every 100kg of straw; add 1.3kg of ammonium bicarbonate for every 100kg of straw, add 1.5kg for every 100kg of straw; add 100kg of water for every 100kg of straw. 2.0 meters. Drill holes with iron brazing and cover them with plastic film,...

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Abstract

The marsh gas fermentation process with composite microbial preparation treated stalk includes the following steps: crushing stalk material, wetting with water for 18 hr, adding composite microbial preparation and ammonium bicarbonate as the nitrogen source, replenishing water and mixing, stacking and covering with plastic foil, fermenting for 3-6 days and maintaining at temperature over 50 deg.cfor 3 days, transferring to marsh gas tank, adding ammonium bicarbonate methane producing inoculum and sealing for 2-7 days to produce marsh gas. The present invention has fast marsh gas producing speed and raised marsh gas producing quantity.

Description

technical field [0001] The invention relates to a biogas fermentation method for pretreating straw, in particular to a biogas fermentation method for pretreating straw by adding a microbial compound bacterial agent. It can also be used for biological treatment of other organic solid wastes, such as compound bacterial agent pretreatment for solid livestock, poultry manure, and urban organic waste. Background technique [0002] At present, my country's rural energy structure is mainly coal, straw and biomass gas. Burning coal and burning straw will cause certain pollution to the environment. In order to improve the rural ecological environment and improve the quality of life of farmers, the country vigorously promotes clean energy-biogas, that is, the use of livestock and poultry manure to produce biogas, and biogas residue and biogas slurry are good organic fertilizers. According to statistics, my country's current household biogas digesters have grown to more than 10 milli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P3/00C12P39/00C12M1/107C12R1/25C12R1/10C12R1/885C12R1/00
CPCY02E50/343Y02E50/30
Inventor 刘晓风颜开廖银章张海涛袁月祥颜丽刘克鑫
Owner 北京合百意生态能源科技开发有限公司
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