Straw saccharification acidification treatment method

A technology of acidification treatment and straw, applied in the direction of biochemical equipment and methods, microorganisms, microorganisms, etc., can solve the problems of ignoring intermediate products, achieve the effects of shortening processing time, reducing energy consumption, and improving efficiency

Inactive Publication Date: 2015-10-14
BEIJING HELEE BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional straw anaerobic fermentation systems, whether one-phase or two-phase fermentation, focus on the production of methane while ignoring valuable intermediate products

Method used

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  • Straw saccharification acidification treatment method
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  • Straw saccharification acidification treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This embodiment relates to a kind of high-efficiency acidification flora fermented liquid, and its preparation method is as follows:

[0044] Take the biogas slurry from a chicken manure biogas project in Yanqing, separate the solid phase and liquid phase with a vibrating sieve, concentrate the solid phase, adjust the pH to 5.5 with hydrochloric acid, and leave it for 3 days to treat the solid phase; compound additives (including CaO 100 parts by weight, 5 parts by weight of cellulase), sorghum straw and the above-mentioned liquid phase are mixed according to the weight ratio of 1:12:120, and the straw saccharification liquid is obtained after standing for 5 days; the above-mentioned treated solid phase is added to the straw saccharification liquid, The initial pH value was adjusted to 7.5 to carry out the fermentation reaction, and the content of volatile fatty acids (VFAs) in the fermentation broth was measured until the content of volatile fatty acids did not increase...

Embodiment 2

[0046] This embodiment relates to a kind of high-efficiency acidification flora fermented liquid, and its preparation method is as follows:

[0047] Take the biogas slurry from a straw biogas project in Yanqing, separate the solid phase and liquid phase with a vibrating sieve, concentrate the solid phase, adjust the pH to 4 with hydrochloric acid, and leave it for 1 day to treat the solid phase; the compound additive (containing CaO 50 parts by weight, 1 part by weight of cellulase), corn stalks and the above-mentioned liquid phase are mixed according to the weight ratio of 1:10:100, and the straw saccharification liquid is obtained after standing for 2 days; the above-mentioned treated solid phase is added to the above-mentioned straw saccharification liquid, Adjust the initial pH value to 6.5 to carry out the fermentation reaction, measure the content of volatile fatty acids (VFAs) in the fermentation broth, until when the value of the content of volatile fatty acids does not...

Embodiment 3

[0049] This embodiment relates to a kind of high-efficiency acidification flora fermented liquid, and its preparation method is as follows:

[0050] Take biogas slurry from a straw biogas project in Yanqing, separate the solid phase and liquid phase with a vibrating sieve, concentrate the solid phase, adjust the pH to 5 with phosphoric acid, and leave it for 2 days to treat the solid phase; the compound additive (containing CaO 40 parts by weight, 1 part by weight of cellulase), wheat straw and the above-mentioned liquid phase are mixed according to the weight ratio of 1:9:90, and the straw saccharification liquid is obtained after standing for 2 days; the above-mentioned treated solid phase is added to the above-mentioned straw saccharification liquid, The initial pH value was adjusted to 7 to carry out the fermentation reaction, and the content of volatile fatty acids (VFAs) in the fermentation broth was measured, until the content of volatile fatty acids did not increase, an...

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Abstract

The present invention relates to a straw saccharification acidification treatment method. The method uses efficient acidification flora fermentation broth and a compound additive to conduct saccharification and acidification on straw, so as to rapidly saccharify and acidify the straw, and the solid liquid products are separated after the treatment. The efficient acidification flora fermentation broth is prepared by mixing reaction of a solid phase and a liquid phase separated from the biogas slurry with a composite additive and the straw; and the composite additive comprises CaO and cellulase. The method of the present invention effectively removes cellulose, hemicellulose, lignin and other organic matters in straw, improves the content of monosaccharide in the acidified liquid after treatment and the efficiency of saccharification and acidification, and obtains the intermediate with high concentration and high value, so as to make full use of straw. In addition, the method shortens the straw treatment time, simplifies treatment flow, substantially reduces energy consumption, and is in favor of energy saving and environmental protection and worth great popularization and application.

Description

technical field [0001] The invention relates to a straw saccharification and acidification treatment method, which belongs to the technical field of straw comprehensive utilization and environmental protection. Background technique [0002] my country is a large agricultural country with abundant straw resources, with an annual output of about 800 million tons. However, due to its difficulty in degradation and time-consuming, it has not been well utilized as a resource. Pretreatment of straw is one of the effective means to improve the utilization rate of straw biomass. [0003] The cell wall of straw is mainly composed of cellulose, hemicellulose and lignin. The dense structure formed by the interweaving of the three hinders the action of enzymes, microorganisms or chemical reagents on each component. The degradation of any component is restricted by other components. . Therefore, the opening and degradation of the dense structure of lignocellulose is the first step in st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/00C12P19/02C12P1/00
Inventor 陈曦光钟凯民潘文智刘旭明马连国胡宝富王亚男
Owner BEIJING HELEE BIO ENERGY
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