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Method for preparing biogas through activated carbon, kitchen garbage and faeces

A technology of kitchen waste and activated carbon, which is applied in the fields of organic fertilizer, waste fuel, sludge treatment, etc., can solve the problems of low biogas production efficiency per unit area, reduce the amount of domestic garbage removal, and low added value of kitchen waste utilization, and achieve It is conducive to large-scale promotion and application, shortens the anaerobic time, and facilitates management.

Inactive Publication Date: 2015-11-18
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method of using activated carbon, kitchen waste and The method of preparing biogas from feces, by adding exogenous activated carbon to improve the efficiency of fermentation of kitchen waste and feces as raw materials to produce biogas and methane, the method is simple in process and stable in operation, and can also reduce production costs and is suitable for large-scale promotion ; In addition, it can also effectively reduce the amount of domestic garbage removal, save resources, control the generation of odorous gases, and achieve energy saving and emission reduction

Method used

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  • Method for preparing biogas through activated carbon, kitchen garbage and faeces
  • Method for preparing biogas through activated carbon, kitchen garbage and faeces

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Effect test

Embodiment 1

[0036] Embodiment 1: produce biogas according to the following steps

[0037] (1) From the selected domestic waste, sort out the kitchen waste mainly rice and flour food residues, and then put them into the pretreatment tank together with chicken manure at a ratio of 1:1 of total solids, mix and keep the temperature at 35±1°C Heated for 5 hours to obtain a mixture;

[0038] (2) Mix the mixture of the adjusted step (1), sieved into 20-mesh activated carbon and inoculum evenly, and put them into two anaerobic fermentation tanks in turn with a screw flow device to heat at a constant temperature of 35±1°C, and stir for 12 Ferment for 30 days to obtain biogas and fermentation residue respectively; wherein, the amount of activated carbon added is 40% of the total solids of the mixture of kitchen waste and chicken manure obtained in step (1); the inoculum is an old biogas digester with a water content of 92.8% The amount of biogas slurry added is 10% of the total solids of the mixture...

Embodiment 2

[0042] Embodiment 2: produce biogas according to the following steps

[0043] (1) From the selected domestic waste, sort out the kitchen waste mainly of fruits, vegetables and fruit peels, and then put them into the pretreatment tank together with pig manure according to the total solid content of 1.5:1, mix and heat at a constant temperature of 40±1°C for 6 hours , get a mixture;

[0044] (2) Mix the mixture of the adjusted step (1), sieved into 50-mesh activated carbon and inoculum evenly, and put them into two anaerobic fermentation tanks with a screw flow device in turn to heat at a constant temperature of 40±1°C, and stir for 18 Ferment for 33 days in 1 hour to obtain biogas and fermentation residue respectively; wherein, the amount of activated carbon added is 50% of the total solids of the mixture of kitchen waste and pig manure obtained in step (1); the inoculum is 95.2% of the urban sewage treatment plant Oxygen-digested sludge, the amount added is 12.5% ​​of the tot...

Embodiment 3

[0048] Embodiment 3: produce biogas according to the following steps

[0049] (1) From the selected domestic waste, sort out the kitchen waste mainly meat, animal and vegetable oil, and then put it into the pretreatment tank together with the cow manure according to the total solid content of 2:1, mix and heat at a constant temperature of 45±1°C for 7 hours, a mixture is obtained;

[0050] (2) Mix the mixture of the adjusted step (1), sieved into 100-mesh activated carbon and inoculum evenly, and put them into two anaerobic fermentation tanks with a screw flow device in turn to heat at a constant temperature of 45±1°C and stir for 24 Ferment for 35 days to obtain biogas and fermentation residue respectively; wherein, the amount of activated carbon added is 60% of the total solids of the mixture of kitchen waste and cow dung obtained in step (1); the inoculum is slaughterhouse sewage with a moisture content of 93.1%. Mud, the amount added is 15% of the total solids of the mixt...

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Abstract

The invention relates to a method for preparing biogas through activated carbon, kitchen garbage and faeces, and belongs to the technical field of renewable energy. The method specifically comprises the following steps that the kitchen garbage and the faeces are put into a pretreatment tank to be mixed and heated at constant temperature, and a mixture is obtained; the mixture, the activated carbon and inoculums are put into at least one anaerobic fermentation tank to be heated at constant temperature, stirring and fermentation are carried out, and biogas and fermentation residues are obtained. The method has the advantages that the allothigene active carbon is added, so that the efficiency of fermentatively producing biogas and methane with kitchen garbage and faeces as raw materials is greatly improved, and running is stable; meanwhile, production cost can be lowered, and the method is suitable for large-scale popularization; in addition, the amount of cleared household garbage can be effectively reduced, resources can be saved, generated foul gas can be controlled, and energy saving and emission reducing can be achieved.

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 utilizing activated carbon, kitchen waste and feces. Background technique [0002] Most of the raw materials for traditional biogas production are livestock and poultry manure. However, due to rapid economic development and rising grain prices, there is a shortage of livestock and poultry manure raw materials in many places. Traditional biogas production often results in unstable gas production due to lack of raw materials, or even no gas production in severe cases. In addition, due to the limitation of the inherent properties of raw materials, when traditional livestock and poultry manure is used as raw material for anaerobic digestion, the biogas production is usually relatively low, about 350L / kg·VS. [0003] Kitchen waste is a general term for leftovers discarded by households and catering units. It is an important part o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04C05F11/00
CPCY02E50/30Y02P20/133Y02P20/59Y02W10/20Y02W30/40
Inventor 戴本林徐继明徐宁邓媛方吴真
Owner HUAIYIN TEACHERS COLLEGE
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