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Agricultural waste anaerobic digestion process taking steam explosion as pretreatment

A technology for agricultural waste and anaerobic digestion, which is applied in agriculture, bio-organic part treatment, organic fertilizer preparation, etc., can solve the problems that microorganisms are difficult to access, lignin cannot be biodegraded, etc., and achieve the effect of shortening the time

Inactive Publication Date: 2010-10-06
杨春和
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem is that lignin is almost impossible to biodegrade, and a large amount of cellulose and hemicellulose are wrapped by lignin that is difficult to degrade, which makes it difficult for microorganisms to access biodegradable cellulose and hemicellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Steam explosion treatment of agricultural waste

[0029] For crop straw, chicken manure, etc., the dosage ratio is determined according to its C / N ratio of 30:1. Generally, the C / N ratio of rice straw and wheat straw is 80:1, and that of chicken manure is 10:1. If the total weight of raw materials is 100kg, the amount of straw is 75kg, and the amount of chicken manure is 25kg. Use a pulverizer to crush the raw materials to about 3cm, add water to soak for 5 minutes according to the weight ratio of 1:1, put it into the steam explosion tank, and then introduce high-pressure steam to make the pressure in the steam explosion tank reach the range of 1.3Mpa, maintain the pressure for 9 minutes, and then quickly The pressure in the steam explosion tank is released, the raw materials are released into the normal pressure container, and the agricultural waste raw materials after steam explosion treatment are obtained.

[0030] 2. Anaerobic fermentation treatment using steam ...

Embodiment 2

[0033] Use crop straw, livestock and poultry manure, etc., according to their C / N ratio to determine the dosage ratio. In this experiment, corn stalks were used, the C / N ratio was 60:1, and the chicken manure was 15:1, so that the total C / N of raw materials was about 25:1. Use a pulverizer to crush the raw materials to about 3cm, put them into the steam explosion tank, and then introduce high-pressure steam to make the pressure in the steam explosion tank reach the range of 1.5Mpa, maintain the pressure for 6 minutes, then quickly release the pressure in the steam explosion tank, and put the raw materials Released into the normal pressure container to obtain the agricultural waste raw material after steam explosion treatment.

[0034] 2. Anaerobic fermentation treatment using steam explosion products as raw materials

[0035] Put the steam explosion material into the anaerobic digestion tank, add water, so that the total solid content is about 8%, and at the same time use the...

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Abstract

The invention relates to an agricultural waste anaerobic digestion process taking steam explosion as pretreatment. The process comprises the following steps of: preparing raw materials in a C / N ratio of 20 to 30, and determining proper using amount of straw crops and livestock excrement; and after the determined raw materials are mixed uniformly, performing steam explosion pretreatment and then performing anaerobic digestion treatment, wherein the generated CH4 gas can be used as fuel and fermentation solution and the like are used as fertilizers. The process for treating agricultural wastes by using steam explosion technology effectively improves the biological conversion rate of the anaerobic digestion treatment, and shortens the treatment time so as to fulfill the purposes of simplifying the treatment process, improving the utilization rate of equipment and lowering the running cost; and the process solves the problem of environmental pollution and brings social benefit and economic benefit.

Description

technical field [0001] The invention relates to the treatment and utilization of agricultural waste, in particular to an anaerobic digestion process utilizing agricultural waste. Background technique [0002] Agricultural waste refers to the organic substances discarded during the entire agricultural production process, mainly including: plant residue waste generated in the agricultural and forestry production process; animal residue waste generated in the animal husbandry and fishery production process; agricultural processing process Residual waste from processing and domestic waste from rural and urban areas. In terms of total amount and composition, it mainly includes crop straw and livestock and poultry waste. The processing and utilization of agricultural waste has always been an important topic in the field of pollution prevention and resource utilization in recent years. [0003] 1. Utilization status of agricultural waste [0004] Straw not only generally has hig...

Claims

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Application Information

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IPC IPC(8): C05F17/00
CPCY02W30/40
Inventor 杨春和
Owner 杨春和
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