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Application of duel functional composite bacteria agent capable of decomposition of stalk and low-temperature production of biogas

A compound inoculant and biogas production technology, applied in the directions of bacteria, microorganism-based methods, biochemical equipment and methods, etc., can solve the problems of difficult fermentation of straw biogas, low-temperature gas production, etc., and achieves low cost, easy popularization, and usage simple effect

Inactive Publication Date: 2009-03-11
INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the two major problems currently restricting the development of household biogas digesters in my country, the present invention provides the application of a dual-functional composite microbial agent for straw decomposition and low-temperature biogas production, which can simultaneously solve the problems of difficulty in straw biogas fermentation and low-temperature gas production in winter for household biogas digesters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Straw decomposition and low-temperature biogas-producing dual-functional composite bacterial agent, straw decomposition and low-temperature biogas-producing dual-functional composite bacterial agent is composed of Pseudomonas fluorescens, Bacillus cereus, and Bacillus subtilis The fermented liquid of four kinds of bacteria of Bacillus subtilis and Bacillus circulans consists of the following parts by weight:

[0033] 6-15 parts of Pseudomonas fluorescens liquid, 4-8 parts of Bacillus cereus liquid, 6-10 parts of Bacillus subtilis liquid, and 5-8 parts of Bacillus circulus liquid.

[0034] The above four kinds of bacteria are all purchased from the strain preservation center, and are fermented and prepared by conventional methods, and the number of effective viable bacteria in the fermentation broth is respectively above 1 billion / ml.

Embodiment 2

[0036] Example 2: A method of using a dual-functional bacterial agent for straw decomposition and low-temperature biogas production in an 8m3 biogas digester with straw as the main raw material, the steps are as follows:

[0037] 1. Select 400kg of corn stalks free from pesticides, disinfectants and other toxic substances as fermentation raw materials.

[0038] 2. Shred the straw raw materials with a hay cutter, and the length is 1-3cm.

[0039] 3. Add 400kg of water to moisten the straw raw material, turn over and mix well while adding water, and then place the straw for one day to make the straw fully absorb water.

[0040] 4. Mix 5 kg of ammonium bicarbonate with a small amount of water and sprinkle it into the wet straw in layers to make the moisture content of the straw reach 70%.

[0041] 5. Pile the straw into a length of 1-1.2m, a width of 1-1.2m, and a height of 1-1.2m, and cover it with plastic cloth for retting. Straw raw materials are turned into the pile for retti...

Embodiment 3

[0045] Example 3: A dual-functional microbial agent for straw decomposition and low-temperature biogas production was used in a 10m2 plant with straw as the main raw material 3 The method of use in the biogas digester, the steps are as follows:

[0046] 1. Select 500kg of corn stalks free from pesticides, disinfectants and other toxic substances as fermentation raw materials.

[0047] 2. Shred the straw raw materials with a hay cutter, and the length is 1-3cm.

[0048] 3. Add 500kg of water to moisten the straw raw material, turn over and mix well while adding water, and then place the straw for one day to make the straw fully absorb water.

[0049] 4. Mix 6 kg of ammonium bicarbonate with a small amount of water and sprinkle it into the wet straw in layers to make the moisture content of the straw reach 70%.

[0050] 5. Pile the straw into a length of 1-1.2m, a width of 1-1.2m, and a height of 1-1.2m, and cover it with plastic cloth for retting. Straw raw materials are tur...

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Abstract

The invention relates to application of straw decomposition and low-temperature methane production dual-function composite microbial inoculum, which is used in a rural household methane tank which takes crop straws as main raw materials or in a household methane tank which has been started in winter in the northern area and takes feces or the crop straws as main raw materials, so as to promote the fermentation of the straw raw materials and guarantee normal methane production of the methane tank under the condition of low temperature in winter. The methane production effect of the rural household methane tank which adopts the method is good; after addition of the composite microbial inoculum into the methane tank which takes the straws as the main raw materials under normal temperature, the starting time is shortened by 5 to 12 days compared with a contrast tank and the average methane production amount per day is improved by 30 to 50 percent compared with the contrast tank; and the normal use of the methane tank can still be guaranteed under the condition of the lower temperature in winter. The invention is mainly suitable for the rural household methane tank, has the advantages of quick effect, long effect, low cost, simple use method, easy popularization and so on, and can be promoted and used.

Description

technical field [0001] The invention belongs to the technical field of microbial bacterial agents in biogas technology, and specifically relates to a method for using a dual-functional microbial agent for straw decomposition and low-temperature biogas production, which can simultaneously solve the two major problems of difficulty in straw fermentation and low-temperature gas production in household biogas digesters . Background technique [0002] At present, the construction of rural biogas digesters has become an important part of the construction of a new socialist countryside, and is closely related to the development of the entire rural economy and society. However, it should be noted that there are still two most important issues unresolved in the development of household biogas digesters in my country: [0003] The first is the difficulty of fermenting biogas from straw as the main raw material. The amount of crop straw resources in my country ranks first in the worl...

Claims

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Application Information

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IPC IPC(8): C12P39/00C12P5/02C12N1/20C12R1/39C12R1/085C12R1/125C12R1/09
CPCY02E50/343Y02E50/30
Inventor 王艳芹刘英刘兆辉袁长波张昌爱姚利王梅曹德宾边文范李国生
Owner INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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