Mixed microbial treated method of raw material agricultural straw and poultry excrement based on methane fermentation

A technology of livestock and poultry manure and biogas fermentation

Inactive Publication Date: 2017-06-09
ZHENGZHOU KAISHAN BIOCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to improve the efficiency of straw fermentation has become the focus of scholars, but no effective solution has been proposed for the problem of low fermentation efficiency in the fermentation process.
[0003] Therefore, in order to realize the large-scale production of biogas from straw, a key problem needs to be solved, that is, to develop a simple, fast and efficient straw pretreatment technology to solve the problems of low efficiency, unbalanced C / N ratio and pretreatment in the current straw treatment process. Dealing with key issues such as high costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Weigh 1 kg of corn stalks crushed to a length of 20 mm, add 2500 g of feces (10% solid content) after treatment at 70 degrees for 30 minutes, and anaerobically treat them for 28 days after adding microbial agents;

[0016] 2) The material after anaerobic treatment is put into a biogas fermentation tank for anaerobic digestion. The fermentation temperature is controlled at 45°C and the stirring rate is controlled at 150rpm. After 30 days of fermentation, the average biogas production of 1kg of dry material is 0.75m 3 .

Embodiment 2

[0018] 1) Weigh 1 kg of corn stalks crushed to a length of 20 mm, add 2500 g of feces (10% solid content) after treatment at 70 degrees for 30 minutes, and anaerobically treat them for 28 days after adding microbial agents;

[0019] 2) The material after anaerobic treatment is put into a biogas fermentation tank for anaerobic digestion. The fermentation temperature is controlled at 45°C and the stirring rate is controlled at 150rpm. After 30 days of fermentation, the average biogas production of 1kg of dry material is 0.59m 3 .

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Abstract

The invention relates to a mixed microbial treated method of raw material agricultural straw and poultry excrement based on methane fermentation; a bulk raw material straw and excrements of livestock in a livestock farm are used as the main raw material. After heating the excrements of livestock, the excrements of livestock and the agricultural straw are mixed at ratio to perform strengthened microorganism anaerobic treatment (microbial treatment); the mixed material after microbial treatment is applied to anaerobic digestion and methane generation after the heat treatment. Thus the method effectively treats straw and excrements of livestock while achieves waste stabilization, harmless, reduction and resource utilization; therefore, the method meets the development direction in future.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and in particular relates to a micro-storage method based on biogas fermentation raw material agricultural straw and livestock and poultry manure. Background technique [0002] At present, my country's straw biogas production is still limited to "farm household type". Although the equipment and management of this method are simple, the fermentation rate is slow and the efficiency is low, and the gas production potential of straw cannot be fully utilized. However, the production of biogas has not been widely promoted. The main reason is that the straw has a high content of polymer substances, such as cellulose, hemicellulose, pectin and lignin, etc., and its own available nutrients are low, and there is a layer of waxy layer on the surface, so the straw decomposes slowly during anaerobic fermentation. The degradation rate is low. Therefore, for the biogas production system using straw as r...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C12P39/00C12P5/02C02F11/04C12R1/225C12R1/07C12R1/46
CPCC02F11/04C12P5/023C12P39/00Y02E50/30
Inventor杨旭马晓建李楠李洪亮王根灿韦丽莹
OwnerZHENGZHOU KAISHAN BIOCHEM ENG