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Method for preparing biomass gas from pure straw

A biomass gas and straw technology, applied in waste fuel, fermentation and other directions, can solve the problems of difficult storage, low gas production rate, and low utilization rate of straw, and achieve the effects of improving production efficiency, cleaning raw materials, and improving gas production rate.

Inactive Publication Date: 2018-12-14
山东莱田生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the process of developing and utilizing straw biomass energy, there are problems such as difficulty in collecting and storing straw, low utilization rate of straw, easy acidification in the gas production process, low gas production rate, and environmental pollution by subsequent fermentation by-products.

Method used

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  • Method for preparing biomass gas from pure straw
  • Method for preparing biomass gas from pure straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing biomass gas by utilizing pure sweet sorghum stalks, comprising the following steps:

[0035] 1) After crushing fresh sweet sorghum stalks to a particle size of 2-5 cm, adjust its water content to 60%; then spray an aqueous solution containing straw starter bacteria in the straw, so that the straw starter bacteria account for 0.05‰ of the weight of the straw , and then the straw is compacted and sealed for storage for later use;

[0036] 2) Add cellulase to the straw stored in step 1), control the weight ratio of cellulase to straw at 0.05:1000, put it into the hydrolysis tank for pretreatment for 40 hours, use a blower to aerate the hydrolysis tank, and use a stirring paddle to It is stirred, and the hydrolysis temperature is controlled at 38°C;

[0037] 3) The straw after 2) hydrolysis enters the fermenter for anaerobic fermentation to produce energy gas (biomass gas). The temperature of the fermenter is controlled at 48°C, and the material is sti...

Embodiment 2

[0040] A method for preparing biomass gas from pure corn stalks, comprising the following steps:

[0041] 1) After crushing fresh corn stalks to 2-5cm, adjust its water content to 65%; then spray an aqueous solution containing straw starter bacteria in the straw so that the straw starter bacteria account for 0.08‰ of the weight of the straw, and then The straw is compacted and sealed for storage;

[0042] 2) Add cellulase to the stored straw, control the weight ratio of cellulase to straw at 0.01:1000, put it into the hydrolysis tank for pretreatment for 48 hours, aerate the hydrolysis tank with a blower, and stir it with a stirring paddle , the hydrolysis temperature is controlled at 37°C;

[0043] 3) The straw after 2) hydrolysis enters the fermenter for anaerobic fermentation to produce energy gas (biomass gas). The temperature of the fermenter is controlled at 49°C, and the material is stirred with a stirring paddle to obtain biomass gas and fermented material ;

[0044...

Embodiment 3

[0046] A method for preparing biomass gas from pure cotton stalks, comprising the following steps:

[0047] 1) After crushing the fresh cotton stalks to 2-5cm, adjust its water content to 55%; then spray an aqueous solution containing the straw starter bacteria in the straw, so that the straw starter bacteria account for 0.1‰ of the weight of the straw, and then The straw is compacted and sealed for storage;

[0048] 2) Add cellulase to the stored straw, control the weight ratio of cellulase to straw at 0.1:1000, put it into the hydrolysis tank for pretreatment for 24 hours, aerate the hydrolysis tank with a blower, and stir it with a stirring paddle , the hydrolysis temperature is controlled at 39°C;

[0049] 3) The straw after 2) hydrolysis enters the fermenter for anaerobic fermentation to produce energy gas (biomass gas). The temperature of the fermenter is controlled at 47°C, and the material is stirred with a stirring paddle to obtain biomass gas and fermented material ...

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Abstract

The invention provides a method for preparing biomass gas from pure straw. The method comprises the following steps: adjusting the water content of the straw to 55 to 75%, then adding a straw starterstrain accounting for 0.001 to 0.01% of the weight of the straw, then compacting the straw, and subjecting the compacted straw to hermetic storage for subsequent usage; crushing the stored straw, adding cellulase accounting for 0.001 to 0.01% of the weight of the crushed straw, and carrying out hydrolysis in a hydrolysis pool under the conditions of aeration and stirring for 24 to 48 hr, wherein ahydrolysis temperature is controlled to be 37 to 39 DEG C; subjecting the hydrolyzed straw to anaerobic fermentation at 47 to 49 DEG C under stirring so as to obtain biomass gas, fermentation broth and fermentation solid by-products; purifying the obtained biomass gas so as to use the purified biomass gas as an energy source; subjecting the obtained fermentation broth to preparation of a liquid fertilizer; and subjecting the obtained fermentation solid by-products to preparation of a solid organic fertilizer. The method of the invention can further improve the utilization efficiency of the straw and reduce the pollution of the method to environment.

Description

technical field [0001] The invention relates to a high-value utilization method of crop straws, in particular to a method for preparing biomass gas from pure straws. Background technique [0002] Energy is the material basis for human survival and the basic support of the national economy. my country is a big energy consumer. At present, energy supply mainly relies on fossil energy such as coal, oil and natural gas. However, the limitation of fossil energy resources and the huge pressure on the ecological environment caused by the development and utilization process seriously restrict the sustainable development of economic society. Therefore, the development of clean and renewable energy has become an urgent issue in my country's energy field. Among renewable energy sources such as solar energy, wind energy, water energy, tidal energy, geothermal energy and biomass energy, biomass energy has dual attributes such as regeneration and environmental friendliness. It is the onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023C12P2201/00C12P2203/00Y02E50/30
Inventor 梅旭荣张元成宋吉青于萌萌白文波
Owner 山东莱田生物科技有限公司