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Microwave pretreatment method capable of improving anaerobic fermentation efficiency of vinegar residues

An anaerobic fermentation and pretreatment technology, applied in fermentation, waste fuel, etc., can solve the problems of long gas production cycle, low gas production rate, and low biotransformation rate, and achieve the effect of improving efficiency and speeding up the hydrolysis process

Inactive Publication Date: 2019-02-15
江苏久力环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its special structural characteristics, there are still some technical difficulties in anaerobic fermentation of vinegar grains directly as raw materials, such as low bioconversion rate, low gas production rate and long gas production cycle, etc.

Method used

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  • Microwave pretreatment method capable of improving anaerobic fermentation efficiency of vinegar residues
  • Microwave pretreatment method capable of improving anaerobic fermentation efficiency of vinegar residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1（30

[0022] Example 1 (30% power for 5 minutes)

[0023] A microwave pretreatment method for improving the efficiency of anaerobic fermentation of vinegar residues, comprising the following steps:

[0024] S1. The vinegar grains from a vinegar factory in Jiangsu Province were taken for the following anaerobic fermentation. The pH of the vinegar grains was 3.8, the solid content was 33%, and the crude fiber content was 27%.

[0025] S2. Take 80g of vinegar grains and mix them with 80g of water, and treat them under the microwave condition of 180W (30% power) for 5min.

[0026] S3. Take a small amount of fresh vinegar grains and add it to the anaerobic activated sludge, and carry out domestication at 35°C. The initial TS is controlled at 4%, and the initial pH is controlled at 7.5. When the methane content of the system reaches more than 65%, the domestication is successful.

[0027] S4. Inoculate the anaerobic activated sludge acclimated in step S3 into the mixed solution of vinega...

Embodiment 2

[0029] Example 2 (30% power for 10 minutes)

[0030] A microwave pretreatment method for improving the efficiency of anaerobic fermentation of vinegar residues, comprising the following steps:

[0031] S1. Mix vinegar grains with a mass ratio of 1:1 with water, stir evenly, and pretreat under 180W (30% power) microwave conditions for 10 minutes;

[0032] S2. Add 40g of fresh vinegar grains to 70L of anaerobic activated sludge, and place it at 33°C for domestication. The initial TS is controlled at 3%, and the initial pH is controlled at 7.3. When the methane content of the system reaches more than 65%, the anaerobic activity If the sludge is domesticated successfully, proceed to step S3;

[0033] S3. Inoculate the anaerobic activated sludge successfully domesticated in step S2 into the vinegar residue mixture treated in step S1, the inoculum amount is 60%, and place it in a fermenter, put it in a water bath, and control the temperature at 33°C Anaerobic fermentation 45d.

...

Embodiment 3

[0035] Example 3 (30% power for 15 minutes)

[0036] A microwave pretreatment method for improving the efficiency of anaerobic fermentation of vinegar residues, comprising the following steps:

[0037] S1. The vinegar grains from a vinegar factory in Jiangsu Province were taken for the following anaerobic fermentation. The pH of the vinegar grains was 3.5, the solid content was 31%, and the crude fiber content was 26.38%.

[0038] S2. Take 80g of vinegar grains and mix them with 80g of water, and treat them under the microwave condition of 180W (30% power) for 15min.

[0039] S3. Take a small amount of fresh vinegar grains and add it to the anaerobic activated sludge, and carry out domestication at 35°C. The initial TS is controlled at 4%, and the initial pH is controlled at 7.5. When the methane content of the system reaches more than 65%, the domestication is successful.

[0040] S4. Inoculate the anaerobic activated sludge acclimated in step S3 into the mixed solution of v...

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Abstract

The invention discloses a microwave pretreatment method capable of improving anaerobic fermentation efficiency of vinegar residues. The method comprises the steps as follows: S1, mixing and uniformlystirring vinegar residues and water, and pretreating the mixture under a microwave condition; S2, adding a proper quantity of fresh vinegar residues to anaerobic activated sludge for acclimatization;S3, inoculating the vinegar residue mixture treated in S1 with the successfully acclimatized anaerobic activated sludge in S2 with the inoculum size being 60%-80%, and placing the mixture in an anaerobic fermentation device for fermentation. By means of the method, the structure of vinegar residues is damaged in a short time, so that more soluble organic matter is dissolved out, meanwhile, the hydrolytic process of the anaerobic fermentation process of the vinegar residues is accelerated, and the efficiency of producing methane through anaerobic digestion of the vinegar residues is improved.

Description

technical field [0001] The invention belongs to the technical field of solid waste biotransformation, in particular to a microwave pretreatment method for improving the anaerobic fermentation efficiency of vinegar lees. Background technique [0002] my country's vinegar grains are rich in resources, and the annual production and discharge of vinegar grains is about 3 million tons, which has the characteristics of high acidity and difficult decomposition. At present, most vinegar waste is still disposed of in landfill, but it will produce a large amount of greenhouse gases such as methane and high-concentration acid water leachate, which will damage the soil and pollute the environment; a small part is used to make animal feed and edible fungus cultivation materials, but Its drying cost is high, and the consumption of edible fungus cultivation materials is small, so the problem cannot be solved substantially. Vinegar grains are rich in organic matter, and anaerobic fermentat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023C12P2203/00Y02E50/30
Inventor 任永刚秦笑梅高阳耿秋娟
Owner 江苏久力环境科技股份有限公司
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