Method for producing biogas through anaerobic digestion of fruit and vegetable waste

A fruit and vegetable waste and anaerobic digestion technology, which is applied in the direction of waste fuel, fermentation, etc., can solve the problems of continuous and stable operation, high water content of fruit and vegetable waste, and heterogeneous materials, so as to promote hydrolysis and acidification efficiency and improve anaerobic digestion Digestion potential, effect of efficient separation

Active Publication Date: 2012-10-03
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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Problems solved by technology

At present, the research on biogas production from fruit and vegetable waste focuses on traditional single-phase and two-phase anaerobic digestion. The efficiency of single-phase mixed anaerobic digestion is low, and the two-phase anaerobic digestion system achieves two-phase separation under certain conditions. However, due to the characteristics ...

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  • Method for producing biogas through anaerobic digestion of fruit and vegetable waste

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with specific examples, but the present invention is not limited to the following examples. See the process figure 1 , The process temperature is controlled at 30-35°C.

[0021] The system includes a screw extrusion system, a 5L primary hydrolysis acidification reactor, a 2L solid residue secondary enhanced hydrolysis acidification reactor, a 5L leachate collection tank, and a 2L methanation reactor. First, 2000g of fruit and vegetable waste is hydrolyzed and acidified in a natural state for 2 days in the primary hydrolytic acidification tank at a temperature of 35°C, and then transported to the screw extrusion system for solid-liquid separation to obtain about 200g of solid residue and 1800g of primary hydrolytic acidification liquid Materials and liquid materials enter the leachate collection tank, put the solid residue into the secondary enhanced hydrolysis acidification reactor, then add...

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Abstract

The invention discloses a method for producing biogas through anaerobic digestion of fruit and vegetable waste, and belongs to the field of high-efficiency recycling of organic solid waste. The fruit and vegetable waste is firstly subjected to acidification as well as a high-efficiency extrusion process to realize solid-liquid separation, and then a solid-state product and a liquid-state product are treated respectively. Solid-state residue is subjected to secondary reinforcing acidification to enter a high-efficiency anaerobic digestion methane production reactor together with a liquid-state acidification product; and meanwhile, effluent water of the methanator is used as reflux liquid to be circulated in a solid-state residue secondary reinforcing hydrolytic acidification reactor to speed up the hydrolytic acidification reaction. According to the method, high-efficiency transformation of the waste is realized, and the effluent water in the methanator is pumped into the secondary reinforcing acidification reactor for recycling. The method has the advantages of high treatment rate, high gas production rate, short period, capability of realizing continuous stable gas production, no wastewater discharge and the like.

Description

technical field [0001] The invention belongs to the field of high-efficiency resource utilization of organic solid waste, and relates to a method for producing biogas by efficient anaerobic digestion of fruit and vegetable waste. Background technique [0002] Fruit and vegetable waste mainly refers to fruit peels, residues, vegetable leaves, residues, etc. produced during the processing of fruits and vegetables. About 13 million tons of fruit residues and 50 million tons of vegetable residues are produced in my country every year. Fruit and vegetable wastes have a high moisture content and are easy to rot and deteriorate. cause serious environmental pollution. Fruit and vegetable waste has a high content of organic matter. Using anaerobic digestion technology to treat it can not only eliminate pollution, but also efficiently convert organic matter into clean energy biogas. At present, the research on biogas production from fruit and vegetable waste focuses on traditional sin...

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Application Information

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IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 刘广青刘晓英郑毅何艳峰李叶青
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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