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Method for preparing marsh gas through straw, excrement and kitchen waste

A technology for kitchen waste and excrement, applied in biochemical equipment and methods, bioreactors/fermenters for specific purposes, bioreactors for gas production, etc., can solve the problem of incomplete biogas production, effect impact, process reaction time It is beneficial to large-scale popularization and application, stable operation, and shortening of anaerobic time.

Active Publication Date: 2014-12-24
GUANGXI YUDA WATER PROCESSING ENVIRONMENTAL PROTECTION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general process is to produce biogas through simple anaerobic fermentation. This process leads to incomplete biogas production, the effect is affected by various factors, and the reaction time of the process is too long.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The straw and kitchen waste are crushed with a pulverizer, put into the pretreatment tank together with the feces, mixed for 7 hours, and then put into the premix tank for constant temperature heating and mixing to obtain a mixture;

[0030] Put the mixture into 2 anaerobic fermentation tanks in turn with a screw propeller and heat at constant temperature, stir and ferment for 36 hours to obtain biogas and fermentation residue respectively.

[0031] SO removal from biogas 2 , CO 2 Finally, put it in a buffer tank, dehydrate it, pressurize it to the gas storage tank, and get clean biogas; after the fermentation residue is separated, get biogas slurry and solid organic fertilizer; after the biogas slurry is left standing for 5 hours, discharge the supernatant, Get liquid organic fertilizer. Wherein, the above-mentioned constant temperature heating is heated and controlled by a solar device, and the temperature is 38-48°C.

Embodiment 2

[0033] Crush the straw and kitchen waste with a pulverizer, put them into the pretreatment tank together with the feces, and then add municipal sludge accounting for 10% of the weight of the whole straw, feces and kitchen waste to the pretreatment tank, mix for 6 hours, and then Put it into the pre-mixing tank and heat it at a constant temperature, mix it evenly, and get the mixture;

[0034] Put the mixture into two anaerobic fermentation tanks with a screw propeller and heat it at a constant temperature, stir and ferment for 48 hours to obtain biogas and fermentation residue respectively.

[0035] SO removal from biogas 2 , CO 2 Finally, put it in a buffer tank, dehydrate it, and pressurize it to the gas storage tank to obtain clean biogas; after the fermentation residue is separated, biogas slurry and solid organic fertilizer are obtained; after the biogas slurry is left to stand for 6 hours, the supernatant is discharged, Get liquid organic fertilizer. Wherein, the abov...

Embodiment 3

[0037] Grind the straw and kitchen waste with a pulverizer, put them into the pretreatment pool together with the feces, and then add municipal sludge accounting for 15% of the weight of the whole straw, feces and kitchen waste to the pretreatment pool, mix for 8 hours, and then Put it into the pre-mixing tank and heat it at a constant temperature, mix it evenly, and get the mixture;

[0038] Put the mixture into two anaerobic fermentation tanks with a screw propeller and heat it at a constant temperature, stir and ferment for 24 hours to obtain biogas and fermentation residue respectively.

[0039] SO removal from biogas 2 , CO 2 Finally, put it in a buffer tank, dehydrate it, pressurize it to the gas storage tank, and get clean biogas; after the fermentation residue is separated, get biogas slurry and solid organic fertilizer; after the biogas slurry is left standing for 3 hours, discharge the supernatant, Get liquid organic fertilizer. Wherein, the above-mentioned consta...

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PUM

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Abstract

The invention relates to a method for preparing marsh gas through straw, excrement and kitchen waste, and belongs to the technical field of renewable energy. The method comprises the following steps of: a, preprocessing, namely, feeding crushed straw, kitchen waste and excrement into a preprocessing tank; mixing; then transferring into a premixing tank to heat at a constant temperature; and uniformly mixing to obtain a mixture; and b, anaerobic fermentation, namely, feeding the mixture into at least one anaerobic fermentation tank to heat at the constant temperature; and agitating and fermenting to obtain the marsh gas and fermentation residues. The method has the beneficial effects that the operation is stable; the production efficiency of marsh gas is high; the production cost can be reduced; and mass popularization can be performed.

Description

technical field [0001] The invention belongs to the technical field of renewable energy, and in particular relates to a method for preparing biogas by using straw, feces and kitchen waste. Background technique [0002] Using common waste such as straw, manure and kitchen waste to produce biomass energy has always been the direction of scientific and technological personnel's efforts. The existing biomass energy (biogas) preparation methods mainly include: using high-concentration organic waste water to produce biogas gas; using household waste to prepare vehicle power fuel; combining animal manure, straw and sewage to produce biogas; , straw joint treatment to produce biogas. [0003] The production of biogas gas from high-concentration organic wastewater and waste residues uses starch wastewater, alcohol wastewater, and cassava wastewater as raw materials to produce biogas through organic waste residue catalysis, high-efficiency liquid-phase fermentation, and biological an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12M1/107C12M1/02C05F15/00
CPCY02E50/343Y02E50/30Y02P20/133Y02W30/40
Inventor 潘远东
Owner GUANGXI YUDA WATER PROCESSING ENVIRONMENTAL PROTECTION ENG CO LTD
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