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Method and device for producing biogas by solid organic waste

A technology of organic waste and biogas, which is applied in the fields of solid waste removal, biochemical equipment and methods, waste fuel, etc., can solve problems such as heat transfer difficulties, secondary pollution, dry fermentation feeding and discharging, difficulties, etc., and achieve process Simple operation and management, good environmental and economic benefits, and small biogas slurry production

Active Publication Date: 2012-01-18
CHINESE ACAD OF AGRI MECHANIZATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and equipment for producing biogas from solid organic waste, which can overcome the need to add Fresh water, a large amount of biogas slurry will be produced after fermentation, which will easily cause secondary pollution and difficulties in feeding and discharging materials, mass transfer and heat transfer in dry fermentation, so as to realize the harmless treatment and energy utilization of organic waste

Method used

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  • Method and device for producing biogas by solid organic waste
  • Method and device for producing biogas by solid organic waste
  • Method and device for producing biogas by solid organic waste

Examples

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Embodiment 1

[0067] The raw material is cow manure from a dairy farm in city A, and the anaerobic fermentation inoculum comes from anaerobic activated sludge from a biogas plant.

[0068] In the mesophilic anaerobic fermentation reactor 22, the mesophilic anaerobic activated sludge from the biogas plant is used for inoculation and acclimatization.

[0069] In the solid high-temperature fermentation reactor 33, high-temperature anaerobic activated sludge from a biogas plant is used for inoculation and acclimatization.

[0070] After the inoculation and acclimatization is completed, carry out the fermentation process of cattle manure in the following steps:

[0071] (1) The feces of the cattle farm are collected by a forklift and sent to the solid-liquid separator 1 through a conveying device for solid-liquid separation;

[0072] (2) Pump the liquid separated by the solid-liquid separator 1 to the liquid pretreatment heating pool 21 for heating, control the temperature of the liquid pretrea...

Embodiment 2

[0082] The raw materials are sorted organic kitchen waste from city B, and the anaerobic fermentation inoculum comes from anaerobic activated sludge from municipal sewage treatment plants.

[0083] In the mesophilic anaerobic fermentation reactor 22, adopt the mesophilic anaerobic activated sludge of the municipal sewage treatment plant to inoculate and domesticate;

[0084] In the solid high-temperature fermentation reactor 33, the anaerobic activated sludge of the above-mentioned municipal sewage treatment plant is used for inoculation and acclimatization, and the temperature increase mode of increasing 1 ° C per day is gradually raised to a high temperature (58 ° C). Inoculum.

[0085] After the domestication and inoculation is completed, the sorted urban kitchen organic waste is anaerobically fermented to produce biogas according to the following steps:

[0086] (1) Use the solid-liquid separator 1 to separate the collected, sorted, and broken kitchen waste into solid and...

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Abstract

A method and a device for producing biogas by solid organic wastes. The method comprises the following steps of: a pretreatment step; a solid-liquid separation step; a liquid anaerobic fermentation step; a solid anaerobic fermentation step; a secondary integrated anaerobic fermentation step, and a biogas collection utilization and residue liquid treatment step. The device comprises a solid-liquid separator, a liquid anaerobic fermentation system, a solid anaerobic fermentation system, a secondary integrated anaerobic fermentation reactor, a gas collection and utilization system, and a biogas residue liquid treatment system; the solid-liquid separator is connected with the liquid anaerobic fermentation system and the solid anaerobic fermentation system respectively; the liquid anaerobic fermentation system and the solid anaerobic fermentation system are connected with the secondary integrated anaerobic fermentation reactor respectively; the secondary integrated anaerobic fermentation reactor is connected with the gas collection and utilization system and the biogas residue liquid treatment system respectively. The invention realizes the harmless treatment and energy utilization of organic wastes.

Description

technical field [0001] The invention relates to a method for treating solid organic waste, in particular to a method and equipment for producing biogas by anaerobic fermentation of solid organic waste. Background technique [0002] With the continuous and rapid development of my country's economy, the output of organic solid waste, including municipal solid waste, agricultural waste, intensive livestock and poultry manure, sewage sludge, etc., is huge, and its composition is very complex, often containing a large amount of water, volatile substances, Environmental pollutants such as pathogens, parasite eggs and heavy metals can cause serious harm to the natural and social environment if not handled properly. Such as simple open-air stacking, occupying land, destroying the landscape, and the harmful components in the waste can be airborne through the wind, or invade the soil and groundwater sources through rain, and pollute rivers. [0003] According to the characteristics of...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12M1/107B09B3/00
CPCC12M21/04C12M21/16C12M45/04Y02E50/343Y02E50/30
Inventor 李树君刘天舒黄希国景全荣吴丽丽李道义
Owner CHINESE ACAD OF AGRI MECHANIZATION SCI
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