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Straw treatment method and application thereof

A treatment method and technology of straw, applied in the direction of waste fuel, fermentation, etc., can solve the problem of low utilization rate of straw resources, achieve good economic value, good pretreatment effect, and improve efficiency

Active Publication Date: 2020-01-03
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a straw treatment method and its application, which solves the problem of low utilization rate of straw resources in the wet storage process in the prior art by adjusting the moisture content and the pH change in the wet storage process

Method used

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  • Straw treatment method and application thereof
  • Straw treatment method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides a method for treating stalks. The dry yellow corn stalks used come from the Shangzhuang Experimental Station of China Agricultural University, such as figure 1 As shown, the fermentation process specifically includes the following steps:

[0034] 1. Wet storage control stage

[0035] (1) Grinding dry yellow corn stalks so that the particle size is not longer than 2 cm is used as raw material.

[0036] (2) Adjust the moisture content of the raw material to 70% to 80%, and add calcium carbonate with a dry basis weight of 7.5%.

[0037] (3) Fill raw materials into airtight equipment such as silage pits, compact by vehicles to make the compaction density not less than 600kg / m3, seal with plastic film after compaction, place heavy objects on the outside of the plastic film for suppression, and maintain a closed anaerobic environment environment.

[0038] 2. Raw material reprocessing stage

[0039] (1) The raw materials stored for 60 days are taken ...

experiment example 1

[0043] This experimental example detects the economic benefit of the straw fermentation method of embodiment 1, specifically as follows:

[0044] The present invention sets respectively the following treatment groups:

[0045] Experimental group (TS): the straw fermentation method of embodiment 1;

[0046] Control group (CK): Compared with the experimental group, calcium carbonate is not added and moisture is not adjusted;

[0047] Moisture adjustment group (S): Compared with the experimental group, only the water content is adjusted, and calcium carbonate is not added;

[0048]Calcium carbonate addition group (T): Compared with the experimental group, the water content was not adjusted, and an equal amount of calcium carbonate was added;

[0049] A small amount of calcium carbonate added group (STS): compared with the experimental group to add an equal amount of moisture, and add calcium carbonate less than the experimental group's added amount (the added amount is 5% of th...

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Abstract

The invention relates to a straw treatment method and application thereof. The method comprises a wet storage regulation stage. The wet storage regulation stage comprises the following steps: adjusting the moisture content of straw to 70-80%, performing fermentation under an anaerobic condition, and maintaining the pH value at 5.2-6.0 in the fermentation process. By regulating the water content and the pH value in the wet storage process, the straw treatment method provided by the invention extracts out a liquid part after anaerobic fermentation, can extract various organic acids such as lactic acid and butyric acid to increase economic benefits, can produce 53 kg of lactic acid and 45 kg of butyric acid from each ton of corn straw without influencing the methane conversion efficiency of asolid part, and can greatly improve the economic benefits of the process and promote the development of the straw biogas engineering industry.

Description

technical field [0001] The invention relates to the field of resource reuse, in particular to a straw treatment method and application thereof. Background technique [0002] Straw is a kind of agricultural waste, and a large amount of crop straw is produced every year. The use of anaerobic fermentation technology can realize energy recovery and indirect return of nutrients at the same time, and overcome the disadvantages of direct return to the field. Moreover, using straw as a raw material for biomass energy production has the advantages of large output, stable supply, and low cost, and can effectively prevent random stacking and open burning in rural areas, reduce greenhouse gas emissions and reduce air pollution. However, due to the seasonal characteristics of straw production, its effective preservation is the prerequisite for the stable operation of biogas projects throughout the year. Therefore, the selection and optimization of storage technology is a technical probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12P7/52C12P7/56C12P7/54
CPCC12P5/023C12P7/52C12P7/54C12P7/56C12P2203/00Y02E50/30
Inventor 郭建斌孙辉崔宪董仁杰
Owner CHINA AGRI UNIV
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