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Periodical stimulation and solid fermentation process of producing marsh gas with straw and city refuse

A technology of solid-state fermentation and municipal waste, which is applied in the fields of solid waste removal, biological sludge treatment, waste fuel, etc., can solve the problems of solid-state fermentation biogas raw material utilization rate and gas production rate, wet fermentation residue is difficult to handle, etc., to achieve Improve the utilization rate of straw, save the stirring device, and facilitate the use

Inactive Publication Date: 2003-03-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to use solid-state fermentation biogas to solve the problem that wet fermentation residues are not easy to handle, and the other is to improve the utilization rate of solid-state fermentation biogas raw materials and low gas production rate through solid raw material pretreatment and external cycle stimulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Roughly cut the wheat straw to about 25mm long, put it into a steam explosion tank, raise it to 1.5Mpa, maintain the pressure for 10 minutes, open the discharge valve, and release the steam explosion treatment immediately after decompression. Add 10wt% of biogas sludge and 0.5wt% of ammonium carbonate to the steam explosion treated wheat straw as a solid fermentation medium. After the biogas sludge and ammonium carbonate are mixed with the steam explosion material, they are sealed in the fermentation tank, and water is added to make The water content of the solid-state fermentation fermentation medium is 30wt%; the biogas that starts to pass into the fermentation is used to drain the tank air; under the constant temperature culture of 50℃, the pressure is gradually increased as the biogas is produced, and the external use is used every 12-24 hours. The source biogas makes the pressure in the fermentation tank reach 0.1-0.2Mpa. After maintaining the pressure for 5-10 minutes...

Embodiment 2

[0021] The screened domestic garbage is put into a steam explosion tank, raised to 1.0Mpa, the pressure is maintained for 10 minutes, the discharge valve is opened, and the instant decompression is released to obtain the domestic garbage treated by the steam explosion. Add 8wt% of biogas sludge and 0.2wt% of ammonium carbonate, which account for the domestic waste treated by steam explosion, as a solid fermentation medium. After the biogas sludge and ammonium carbonate are mixed with the steam explosion material, they are sealed in the fermentation tank, and water is added. Make the water content of the solid-state fermentation fermentation medium 60wt%; start to pass the biogas into the fermentation to drain the tank air; under a constant temperature culture of 50℃, with the production of biogas, the pressure will be gradually increased, and it will be used every 12-24 hours. The external source biogas makes the pressure in the fermentation tank reach 0.1-0.2Mpa. After maintainin...

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Abstract

The present invention relates to biological marsh gas fermentation, and is especially the periodical stimulation and solid marsh gas fermentation process of straw and city refuse. The said process includes steam blasting dry straw and organic refuse; fast mixing of the steam blasted material and marsh gas and solid fermentation in a sealed fermenting tank; introducing fermented marsh gas to eliminate air from the tank and applying pressure periodically to reinforce solid fermentation; and collecting marsh gas. The said process has raised fermentation temperature and humidity, high marsh gas yield and easy to use fermented residue.

Description

Technical field [0001] The invention belongs to the field of biogas fermentation by using biomass, and particularly relates to a method for periodically stimulating straw and municipal waste to perform solid-state fermentation of biogas. Background technique [0002] At present, biogas fermentation is mainly based on wet biogas fermentation. The decomposition and utilization of crop straw in traditional wet biogas fermentation is very low, and the process of converting unused straw into fertilizer or feed is cumbersome and high in cost. [0003] Wet biogas fermentation is a biogas fermentation process that requires a large amount of free water. In the existing biogas system, the wet biogas fermentation process is widely used, but the disadvantage is that it contains a lot of water, and it has to be more complicated to clean up the remaining fermentation material. In the same way, there are also problems in this aspect when adding materials, which are large i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C02F11/04
CPCY02E50/343Y02E50/30
Inventor 陈洪章李佐虎
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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