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Method for producing biogas through anaerobic fermentation of degradation straw raw material

A technology for anaerobic fermentation and biogas production, which is applied in fermentation, waste fuel, biological sludge treatment, etc., can solve problems such as waste of resources, and achieve the effect of small inoculum amount, simple process and easy access.

Inactive Publication Date: 2017-09-15
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Straw burning not only leads to smog weather, but also a waste of resources

Method used

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  • Method for producing biogas through anaerobic fermentation of degradation straw raw material
  • Method for producing biogas through anaerobic fermentation of degradation straw raw material
  • Method for producing biogas through anaerobic fermentation of degradation straw raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1 Research on anaerobic fermentation of wheat straw to produce biogas

[0026] The wheat straw was crushed into fragments with a length of about 0.5 cm by a pulverizer; the fermentation buffer was prepared according to the formula in Table 1; the mother liquor of ampicillin was prepared; the rumen contents were obtained from the rumen of ruminant cows. Mix 1 g of wheat straw fragments with 90 ml of fermentation buffer and then sterilize, add ampicillin to make the final concentration 2000 U / ml, add 10 ml of rumen content, and ferment anaerobically at 39°C for 72 hours. The conditions of the control group were the same as above, without adding ampicillin. The mass volume ratio concentration of the fermented substance is 1%.

[0027] Table 1 buffer configuration table (1L)

[0028]

[0029]

[0030] After 72 hours of fermentation, the treatment group significantly increased the methane production of the wheat straw anaerobic fermentation system, see figu...

Embodiment 2

[0042] Example 2 Research on Biogas Production by Anaerobic Fermentation of Rice Straw

[0043] The rice straw is crushed into 0.3cm length fragments by a pulverizer; 1g of the chopped raw material is added to the anaerobic reactor as a fermentation product; 45ml of fermentation buffer is added to the anaerobic reactor; Inoculate the rumen content of 5ml fermented product, described rumen content is taken from the rumen of ruminant dairy cow; Make the final concentration of fermented product be (mass volume ratio) 2%; Add ampicillin in anaerobic reactor, make its final concentration be 1800U / ml; biogas produced by anaerobic fermentation in the anaerobic reactor, the reaction temperature is 38°C; the anaerobic fermentation time in the anaerobic reactor is 72 hours, the above is set as the treatment group, and the control group is the group without adding ampicillin. After 72 hours of fermentation, the treatment group (dotted line) significantly increased the methane production ...

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Abstract

The invention discloses a method for producing biogas through anaerobic fermentation of a degradation straw raw material. The method concretely comprises the following steps: chopping the straw raw material to form 0.3-0.8 cm fragments; adding the chopped fragments into an anaerobic reactor as a fermentation material; adding a fermentation buffer solution to the fermentation material in the anaerobic reactor according to a weight / volume ratio of the fermentation material to the fermentation buffer solution of 1:(45-90); inoculating the anaerobic reactor with an inoculation material according to a weight / volume ratio of the fermentation material to the inoculation material of 1:(5-10) to make the final concentration of the fermentation material be 1-2%; and adding ampicillin into the anaerobic reactor to make the final concentration of the ampicillin be 1800-2200 U / ml, and carrying out fermentation at a controlled reaction temperature of 38-40 DEG C for 48-72 h to obtain the biogas. Compared with the prior art, the method disclosed in the invention has the advantages of effective increase of the yield of the biogas produced from the straw raw material by 55-60%, increase of the proportion of the biogas in cumulative gas production, and increase the biogas yield per unit straw raw material.

Description

technical field [0001] The invention belongs to the fields of rural ecological environment protection and rural renewable clean energy utilization, and in particular relates to a method for degrading straw raw materials to produce biogas by anaerobic fermentation. Background technique [0002] my country is rich in crop straw resources, with a theoretical resource of 820 million tons and a collectable resource of about 687 million tons. Due to its scattered distribution, fluffy volume, high collection and transportation costs, and low degree of industrialization, crop straw has regional, seasonal, and structural surpluses, and a large amount of straw has been discarded and incinerated. The amount of discarded and incinerated resources is 215 million tons, accounting for about 1 / 3 of the amount of collectable resources. The remaining about 1 / 3 (211 million tons) is used as feed for ruminants, and about 1 / 3 (261 million tons) is used as industrial raw materials such as fuel, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCC02F11/04C12P5/023Y02E50/30
Inventor 成艳芬李袁飞朱伟云
Owner NANJING AGRICULTURAL UNIVERSITY
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