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Method for generating biogas by using cornstalk through dry fermentation

A technology for corn stalks and biogas production, which is applied in fermentation, waste fuel and other directions, can solve the problem of high sulfur content in biogas, and achieve the effects of low sewage treatment cost, long duration and improved production efficiency

Inactive Publication Date: 2013-03-27
GUIZHOU TAIRAN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the sulfur content of the biogas produced by fermentation in the prior art method is relatively high, and the mixed gas needs to be desulfurized before being reused.

Method used

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Examples

Experimental program
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Embodiment 1

[0022] A method for producing biogas by dry fermentation of straw, comprising the following steps:

[0023] (1) Knead and cut the selected corn stalks with a straw rubbing machine so that the length is 2~5cm;

[0024] (2) Select an appropriate amount of cut corn stalks, put them into a suitable container, add water of the same quality, and moisten and soak the corn stalks for 20 hours;

[0025] (3) Dissolve the selected compound bacteria agent and ammonium bicarbonate in water, sprinkle it on the wet straw, and then stir it with a stirring rod to mix the straw and water evenly, and finally make the moisture content of the straw reach 70%. The amount added is 0.25%;

[0026] (4) Stack the straw into stacks, and punch holes in the stack to ensure internal ventilation, and then cover the surrounding and top of the stack with a film, and leave a gap at the top for ventilation;

[0027] (5) After the stacking temperature reaches above 50°C, the stacking retting sh...

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Abstract

The invention discloses a method for generating biogas by using cornstalk through dry fermentation. The method is characterized by comprising the following steps of: (1) cutting the cornstalk into small segments; (2) adding an equal quantity of water into the cornstalk, and soaking for 15-24 hours; (3) adding a composite microbial inoculant and an ammonium bicarbonate solution, so as to enable the moisture content of the cornstalk to be 60-80%; (4) piling up the cornstalk, punching, covering the surrounding parts and top part of the stack by using a film or cornstalk, and leaving seams at the top part; (5) maintaining the stack retting for 80-120 hours till a layer of white hypha can be seen on the stack; and (6) adding inoculum and carrying out anaerobic fermentation of the cornstalk in normal temperature of 25 DEG C. The method for generating the biogas, provided by the invention, is long in lasting time, high in biogas generation rate, low in sewage treatment expense and low in sulphur content, and can be directly used by a biogas engine without gas washing.

Description

technical field [0001] The invention relates to anaerobic fermentation, in particular to a method for producing biogas by dry fermentation of corn stalks. Background technique [0002] my country is a large agricultural country, and the sown area of ​​crops ranks first in the world. In the past, crop stalks were mostly used as fuel. , the burning and utilization of straw by farmers is also gradually decreasing, and the amount of remaining crop straw is increasing, and a large amount of remaining straw is piled up on the ground and burned randomly, causing a large number of social problems such as air pollution, soil mineralization, fire accidents, and traffic jams. , economic and ecological issues; at the same time, straw, as a renewable energy source, contains huge biomass energy, and its resource utilization plays an important role in saving energy, improving the ecological environment, and realizing the sustainable development of a socialist society. significance. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 冯旭斌
Owner GUIZHOU TAIRAN ENVIRONMENT TECH
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