Biogas production method

A production method and biogas technology, applied in biological sludge treatment, waste fuel, fermentation, etc., can solve problems such as system paralysis, blockage of pipelines, obstacles, etc., to prevent large-scale production, prevent material crusting, and have a wide range of applications. Effect

Inactive Publication Date: 2010-08-25
张华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The fermentation degradation rate and utilization rate of materials are low, and the gas production rate is low
[0007] 2. The processing of material chopping or crushing requires corresponding mechanical equipment and a certain amount of labor, resulting in high investment and operating costs
If the material is not chopped or crushed, it will cause difficulty in feeding the anaerobic tank, and what is more serious is that the pipeline will be blocked during operation, resulting in system failure
[0008] 3. The production and supply of biogas are discontinuous and unstable, which affects the further purification and storage of biogas in the subsequent steps, making it impossible for large-scale production and rational utilization of biogas
High investment and high operating costs also hinder the use of materials with high total solids and suspended solids as raw materials to produce biogas, and the application in industrial and agricultural production and life is also greatly limited

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Step 100: Feed through the large opening 11 of the anaerobic tank 1, and pretreat the material. The raw material is at least one of dry or fresh crop straw, animal manure, and biological waste, and the material does not need to be chopped Or pulverize and directly add inoculum or conditioning agent and mix and stack retting in anaerobic tank 1 until the fibers of the mixed material soften, partially decompose material wax, pectin, and reach a certain temperature; material and inoculum or conditioning agent For layered mixing, the stacking retting time is controlled within 7 days, the moisture content of the mixed material is controlled within the range of 60% to 65%, and the total solid content is controlled within the range of 35% to 40%, so that the fiber softening of the mixed material can proceed smoothly. It can also partially decompose the wax and pectin of the material, which increases the temperature of the mixed material. The inoculum or conditioning agent is a...

Embodiment 2

[0036] Step 100: Feed through the large opening 11 of the anaerobic tank 1, and pretreat the material. The raw material is at least one of dry or fresh crop straw, animal manure, and biological waste, and the material does not need to be chopped Or pulverize and directly add inoculum or conditioning agent and mix and stack retting in anaerobic tank 1 until the fibers of the mixed material soften, partially decompose material wax, pectin, and reach a certain temperature; material and inoculum or conditioning agent For layered mixing, the stacking time is 15 days, the moisture content of the mixed material is controlled within the range of 65% to 70%, and the total solid content is controlled within the range of 30% to 35%, which can make the fiber softening of the mixed material go smoothly. It can also partially decompose the wax and pectin of the material, which increases the temperature of the mixed material. The inoculum or conditioning agent is at least one of livestock an...

Embodiment 3

[0041] Step 100, feeding through the large opening 11 of the anaerobic tank 1, and pretreating the material, the raw material is dry or fresh cyanobacteria, directly adding inoculum or conditioning agent without chopping or pulverizing and Mixed retting is carried out in the oxygen tank 1 until the fiber of the mixed material is softened, the wax and pectin of the material are partially decomposed, and a certain temperature is reached; the material and the inoculum or conditioner are layered and mixed, and the fermentation temperature of the stacked retting material is Above 42°C, the stacking retting time is controlled within 2 days, the moisture content of the mixed material is controlled within the range of 50% to 60%, and the total solid content is controlled within the range of 40% to 50%, which can make the fiber softening of the mixed material go smoothly. It can also partially decompose the wax and pectin of the material, which increases the temperature of the mixed mat...

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Abstract

The invention provides a biogas production method. The method comprises the following steps of: feeding materials, and pre-treating the materials; adding water or biogas slurry into an anaerobic pond where the materials are piled, sealing the anaerobic pond for fermentation, refluxing the biogas slurry or adding water every other 1 to 10 days, periodically stirring the material so as to prevent large-scaled incrustation of the materials, and simultaneously collecting biogas; and after the reaction of the materials in the anaerobic pond is ended, discharging the materials. In the method, the organic materials, of which the total solid content and the suspended matter content are high, can be used as raw materials, the incrustation of the materials is prevented in a process of producing the biogas, and the yield of the biogas produced by degradation and conversion of the materials is high.

Description

【Technical field】 [0001] The invention relates to the technical field of biological fermentation, in particular to a biogas production method using organic materials with high total solids and suspended matter content such as straw, animal manure or other biological waste as raw materials. 【Background technique】 [0002] In the prior art, the method of using organic materials with high content of total solids and suspended solids as raw materials to produce biogas generally requires strict pretreatment, chopping or pulverizing the materials, and then performing anaerobic fermentation in the fermentation device to produce biogas . [0003] The fermentation device used for biogas production in the prior art is mainly an anaerobic pond. The anaerobic pond includes a pond body with a pond cover above the pond body, a sewage pipe, a mud discharge pipe and an outlet pipe for biogas collection on the pond body. The pollutants enter the tank through the sewage pipe, and the biochem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCY02E50/343Y02E50/30
Inventor 张华张冲
Owner 张华
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