Two-phase anaerobic fermentation method for biogas production

A technology for anaerobic fermentation and biogas production, applied in the fields of environmental engineering and energy, can solve the problems of complex process structure and operation, high requirements for personnel and equipment, low gas production efficiency, etc. The effect of shortening the hydrolysis acid production cycle and increasing the gas production of the material

Inactive Publication Date: 2014-05-28
SOUTHEAST UNIV
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Problems solved by technology

The single-phase anaerobic fermentation reactor has a simple structure, low capital investment, and low requirements for personnel and equipment, but the gas production efficiency is low
[0004] The two-phase anaerobic fermentation reactor is to carry out the acid production stage and the gas production stage in two independent fermentation devices, providing the best conditions for acid-producing bacteria and methanogenic bacteria, avoiding the single-phase anaerobic fermentation process microorganisms Due to the inhib

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  • Two-phase anaerobic fermentation method for biogas production

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Embodiment Construction

[0020] The present invention provides a two-phase anaerobic fermentation biogas production method using straw and kitchen waste as raw materials. The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] This method adopts batch feeding, the substrate is placed in the hydrolysis acidification device 14, the fermentation liquid is sprayed on the substrate from top to bottom, and the organic matter in the substrate is produced under the action of the hydrolyzing bacteria group and the acid-producing bacteria group The eluate (the organic eluate is an organic acid such as acetic acid, propionic acid or butyric acid), and the gas generated at the same time escapes through the gas outlet 15, and the organic eluate is filtered by the perforated baffle 11, and is lifted by the lifting pump 12 along with the circulating liquid. Pump into the fermentation gas production device 13, after adjusting the hydraulic ...

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Abstract

The invention discloses a two-phase anaerobic fermentation method for biogas production, which adopts straw and kitchen waste as raw materials. According to the method provided by the invention, the straw and the kitchen waste are mixed in a proper ratio, and inhibition generated by single material is removed, so that two-phase common fermentation is prompted; by arranging a filler in gas-phase production and adjusting the hydraulic retention time in the gas-phase production, the gas yield is greatly increased, and the phase separation effect is greatly improved. The method solves the problems about floating sludge, encrusting and large biogas liquid discharge capacity of a single-phase anaerobic fermentation reactor, greatly improves the hydrolytic acidification efficiency and gas production efficiency of the materials, is particularly suitable for the present situations of wide rural area and dispersed straw production areas, and has a good application prospect.

Description

technical field [0001] The invention relates to a two-phase anaerobic fermentation biogas production method using straw and kitchen waste as raw materials, which belongs to the technical fields of environmental engineering and energy. Background technique [0002] In recent years, with the improvement of living standards and the acceleration of urban-rural integration construction, commercial energy such as electric energy and fossil energy has become the main energy used in rural areas, resulting in a large amount of discarded crop straws being burned in the fields. Straw burning is very harmful, for example: (1) Incomplete combustion of straw will produce a large amount of nitrogen oxides, sulfur dioxide, and inhalable particulate matter that endanger the health of the people; (2) Such burning without any measures is likely to cause fires, Threats to the safety of people's lives and property; (3) The burning of straw produces a large amount of smoke, greatly reducing visib...

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Application Information

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IPC IPC(8): C12P5/02
CPCY02E50/30
Inventor 李先宁吴磊洪锋程伟汪楚乔黄飞
Owner SOUTHEAST UNIV
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