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Method for producing methane through anaerobic fermentation of waste of vegetables and fruits

An anaerobic fermentation and biogas production technology, which is applied in the direction of fermentation and waste fuel, can solve the problems of vegetable and fruit waste polluting the environment, lack of raw materials for biogas tanks without farmers, etc. The effect of high gas efficiency

Active Publication Date: 2012-10-24
INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of vegetable and fruit waste polluting the environment and lack of raw materials in biogas digesters without farmers, the present invention provides a method for producing biogas by anaerobic fermentation of vegetable and fruit waste suitable for household biogas digesters

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: 30 cubic household biogas digesters, autumn

[0038] Vegetable and fruit waste raw materials are discarded cabbage, rapeseed leafy vegetables collected in the vegetable market, and melon and fruit vegetable waste such as tomatoes and eggplants.

[0039] A method for producing biogas by anaerobic fermentation using vegetable and fruit waste as raw materials, the steps are as follows:

[0040] (1) Sorting and crushing the vegetable and fruit waste raw materials, cutting the leafy vegetables into 3-5cm in length, and cutting the solanaceous vegetables into 3-5cm in particle size.

[0041] (2) Submerge the crushed vegetable and fruit waste raw materials with biogas slurry for 10 days of soaking pretreatment, during which they are turned twice a day. Then, add plant ash to adjust the pH value at 7.8.

[0042] (3) Put the raw materials treated in step (2) into a 30 cubic meter household biogas digester, the raw material dosage is 3000 kg, and add 3 cubic meters o...

Embodiment 2

[0045] Example 2: 10 cubic household biogas digesters in summer

[0046] Vegetable and fruit waste raw materials are discarded rotten watermelon, melon peel, etc. in the melon farm.

[0047] A method for producing biogas by anaerobic fermentation using vegetable and fruit waste as raw materials, the steps are as follows:

[0048] (1) Cut or mash the discarded watermelon and melon rind into a particle size of 3-5 cm.

[0049] (2) Submerge the crushed waste raw materials in step (1) with biogas slurry for 7 days of soaking pretreatment, during which they are stirred twice a day. Then, add plant ash to adjust the pH value at 8.0.

[0050] (3) Put the raw materials treated in step (2) into a 10 cubic meter household biogas digester, the raw material dosage is 1000 kg, and add 1 cubic meter of biogas slurry into the biogas digester for the first time as an inoculum. The biogas slurry is taken from normal fermentation The upper biogas slurry in the biogas digester that uses lives...

Embodiment 3

[0053] Example 3: 300 cubic anaerobic reactors throughout the year

[0054] Vegetable and fruit waste raw materials are vegetable scraps produced daily by condiment factories, including onion skins, garlic skins, parsley, peppers, etc.

[0055] A method for producing biogas by anaerobic fermentation using vegetable and fruit waste as raw materials, the steps are as follows:

[0056] (1) Crushing the vegetable and fruit waste raw materials and cutting them into lengths of 3-5 cm.

[0057] (2) Submerge the crushed vegetable and fruit waste raw materials with biogas slurry in the storage tank, and the retting time can be adjusted according to the season. Carry out soaking pretreatment for 10 days, during which time it is turned twice a day. Then, add plant ash to adjust the pH value at 8.0.

[0058] (3) Put the raw materials treated in step (2) and the production waste water in the factory into the acidification adjustment tank to adjust the mixture TS to 10%.

[0059] (4) Pu...

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Abstract

The invention relates to a method for producing methane through the anaerobic fermentation of waste of vegetables and fruits serving as raw materials, which comprises the following steps of: soaking the waste of the vegetables and fruits in fermented liquid for preprocessing, wherein the addition of the fermented liquid is helpful for the initial degradation of the waste of the vegetables and fruits and can regulate the carbon nitrogen ratio of the raw materials; and regulating the pH value of a mixture to between 7.0 and 8.5, putting the preprocessed raw materials into an anaerobic reactor or a methane tank for anaerobic fermentation, adding methane microbial inoculum, producing methane after 3 to 5 days, and fermenting for 60 to 90 days. Through the method, the problem that the raw materials in the methane tanks of non-cultivation farmers are insufficient and the problem that the waste of the vegetables and fruits is wasted and contaminative are solved effectively. By adopting the method, the methane can be produced normally in the methane tanks for the farmers by utilizing the waste of the vegetables and fruits, and the methane producing rate is more than or equal to that of methane tanks taking waste of livestock and poultry as raw materials.

Description

technical field [0001] The invention relates to a method for producing biogas by anaerobic fermentation using vegetable and fruit wastes as raw materials, which can mainly solve the problems of lack of raw materials for non-breeding farmers' biogas pits and waste and pollution of vegetable and fruit wastes, and belongs to the technical field of household biogas pits. Background technique [0002] Under the concept of sustainable development, the Chinese government takes energy conservation and emission reduction as the main direction, and rural areas pay close attention to the construction of "three rural areas" and "ecological enrichment projects". Rural biogas has become an important link for the construction of rural ecological homes, the construction of a new socialist countryside, the realization of agricultural resource recycling and energy conservation and emission reduction, and is closely related to the economic development of the entire rural society. However, in r...

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 姚利王艳芹袁长波张昌爱刘英曹德宾边文范李国生
Owner INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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