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Two-phase dry anaerobic digestion fermentation system

A fermentation system, dry anaerobic technology, applied in the field of two-phase coherent anaerobic digestion and fermentation system

Pending Publication Date: 2021-04-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a two-coherent anaerobic digestion and fermentation system, aiming to solve the problems mentioned in the background technology

Method used

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  • Two-phase dry anaerobic digestion fermentation system

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Embodiment 1

[0099] as attached figure 1 As shown, a two-phase anaerobic digestion and fermentation system provided for an embodiment of the present invention, the two-phase anaerobic digestion and fermentation system includes:

[0100] A hydrolytic acidification pool 2; the hydrolytic acidification pool 2 has hydrolytic acidification bacteria, which are used to hydrolyze and acidify materials;

[0101] Methanation pool 3; there are methanogenic bacteria in the methanation pool 3; the methanation pool 3 is connected with the hydrolytic acidification pool 2, and the digested raw materials after hydrolysis and acidification automatically flow into the methanation pool 3 by their own weight and pressure difference, and are Methanogenic bacteria decompose into biogas slurry, biogas residue and biogas;

[0102] The composting reactor 1 is used for composting the mixture of biogas residue and biogas slurry produced in the methanation tank 3 and specified raw materials, and the heat energy gener...

Embodiment 2

[0201] In this embodiment, the two-phase anaerobic digestion and fermentation system in Example 1 is used for actual fermentation, and the fermentation process is as follows:

[0202] The residual heat generated by the composting raw materials reacting in the composting reactor 1 heats the medium (water) to 60-65°C through the heat exchanger 102, flows into the first medium circulation container 115, and passes through the first jacket 268 and the first jacket 268 of the hydrolysis acidification tank 2. After exchanging heat between the heat exchange coil 255 and the second jacket 465 of the methanation tank 3 , it is sent back into the second medium circulation container 120 , and finally pumped into the heat exchanger 102 of the composting reactor 1 for heating.

[0203] After the kitchen waste and agricultural straw are preliminarily crushed, they are sent to the feeding container 101 with the breeding manure at a ratio of 1:1:1, and a certain amount of biogas slurry dischar...

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Abstract

The invention is applicable to the technical field of biogas fermentation, and provides a two-phase dry anaerobic digestion fermentation system. The system comprises a hydrolysis acidification pool, a methanation pool, a composting reactor and a heat exchange device. Compared with the prior art, the system has the advantages that firstly, a biogas fermentation technology and a composting technology are combined, heat generated in a composting process is used for providing heat needed by biogas fermentation for the hydrolysis acidification pool and the methanation pool, and other additional heating facilities such as an electric heating film and a biogas boiler are not needed; secondly, biogas residues generated in the methanation pool can be used as raw materials for aerobic composting, and organic fertilizer is subsequently produced; and thirdly, in the whole reaction system, the digestion raw materials automatically flow by virtue of self weight and pressure difference, and additional feeding and discharging devices are not needed. According to the invention, the biogas fermentation cost is greatly reduced, basically no wastes such as biogas residues and residue liquid are discharged, and the biogas production technology is convenient to popularize and apply in villages and towns.

Description

technical field [0001] The invention belongs to the technical field of biogas fermentation, and in particular relates to a two-phase coherent anaerobic digestion and fermentation system. Background technique [0002] Biogas anaerobic fermentation can convert various farming wastes and plant wastes into biogas at low cost. The methane content in biogas is generally 60%, and the rest is mainly carbon dioxide. After removing carbon dioxide, artificial natural gas with a methane content of 90% can be obtained. It can be seen that this is an energy development path indicated by nature for human beings. With the improvement of rural living standards in our country, the treatment of domestic garbage, toilet manure, and organic solid waste from agriculture and forestry has become an urgent task for our country to improve the living environment in rural areas and build beautiful and livable villages. The use of dry anaerobic fermentation technology to reduce and recycle domestic g...

Claims

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Application Information

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IPC IPC(8): C12M1/107C12M1/16C12M1/02C02F11/04C05F17/20C05F17/964C05F17/993
CPCC12M21/04C12M21/16C12M23/58C12M27/06C12M27/20C12M37/04C12M41/12C12M41/18C12M41/24C12M41/22C12M45/06C02F11/04C05F17/20C05F17/964C05F17/993Y02W30/40
Inventor 刘石明高彪黄蕾贾永胜王秀萍肖波胡智泉王训王雨
Owner HUAZHONG UNIV OF SCI & TECH
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