Method for preparing marsh gas by pretreating rice straws with acid

A technology for rice straw and acid pretreatment, applied in the field of agricultural production, can solve problems such as crusting, achieve the effects of low cost, realize recycling and reduced production, and avoid scum crusting

Inactive Publication Date: 2014-04-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for preparing biogas from rice straw with acid pretreatment, which can fully utilize rice straw, increase gas production, improve the utilization rate of raw materials, reduce fermentation time, and solve the problem of fermentation The problem of scum crusting in the process improves the efficiency of rice straw recycling, energy and harmlessness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Wash the raw materials, dry them under natural conditions, and cut them into small sections of 2 to 3 cm;

[0017] (2) Get the raw material 50g of step (1) gained and join in the plastic barrel, add the dilute sulfuric acid that concentration is 10%, make the sulfuric acid quality account for raw material mass percentage and be respectively 2%, 4%, 6%, 8%, 10% , then add distilled water, and set the control group (only add water and no acid) at the same time, so that the ratio of its mass to the raw material is 5:1, then spread plastic wrap on the plastic bucket, cover the lid, and place it at room temperature for 30 days ;

[0018] (3) 231g of the raw material obtained in step (2) is taken out, put into the fermentation device, add inoculum 240g and distilled water 330g, wherein the amount of inoculum accounts for 30% of the total fermentation liquid quality, and the concentration of the fermentation feed liquid is 6%, wherein The quality of total fermented liquid...

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PUM

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Abstract

The invention relates to a method for preparing marsh gas by pretreating rice straws with acid, belonging to the technical field of agricultural production. In the method, marsh gas is prepared by pretreating rice straws with acid and performing completely mixed anaerobic fermentation. By adopting the method, efficient and stable preparation of marsh gas is realized by using rice straws. The method has the characteristics of high raw material utilization ratio, stable gas production, high gas yield, difficult occurrence of floating slag incrustation phenomenon in the fermenting process and realization of resource, energy regeneration and harmless treatment of rice straws.

Description

technical field [0001] The invention relates to a method in the technical field of agricultural production, in particular to a method for preparing biogas by acid pretreatment of rice straw. Background technique [0002] my country is a major rice producing country, and a large amount of rice straw is produced every year. Most of the rice straw is discarded and burned at will, causing great environmental pollution, affecting the quality of life of farmers, and causing a great waste of resources. How to solve the environmental problems caused by random discarding and burning of rice stalks in rural areas and improve the quality of life of farmers has become an important issue in the construction of new countryside. The use of rice straw to produce biogas can not only solve the problem of lack of raw materials for rural biogas digesters, but also reduce many environmental problems caused by straw burning at the root; The problem of crop diseases and insect pests caused by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 刘荣厚覃国栋孙辰
Owner SHANGHAI JIAO TONG UNIV
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