Method for ferment preparation of sludge gas with vegetable castoff as raw material

A technology for vegetable waste and raw materials, applied in the energy field, can solve the problems of complex fermentation raw material composition, inability to guarantee the carbon-nitrogen ratio of raw materials, etc., and achieve the effects of shortening the gas production cycle, improving the gas production effect, and improving the sensitivity.

Inactive Publication Date: 2008-04-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is: the composition of fermentation raw materials is relatively complex, without effective pretreatment, the carbon-nitrogen ratio of raw materials required for biogas fermentation cannot be guaranteed, and biogas production can be carried out smoothly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Sorting pretreatment of raw vegetable waste: simple sorting of the collected cabbage leaf waste; wash the sorted cabbage leaf waste once with water, then chop it up and then use a tissue masher Crush into uniform particles with a uniform particle size of about 1 to 2 cm, and then grind them. The C / N of the cabbage leaf waste was 22.35.

[0032](2) Put 667kg of the pretreated cabbage leaf waste obtained in step (1) into the fermentation device designed by the laboratory, and add 133kg of the substrate of the normal gas-producing biogas digester with the inoculum moisture content of 92.488% for inoculation , Mix to obtain the fermentation raw material, the addition amount of the inoculum (referring to the ratio of the inoculated sludge to the mass of the total reaction material) is 20%, 200ml of water is added to control the total solid content of the fermentation broth to 10%, and then 1g of carbon powder is added. The fermentation reaction produces gas.

[0033] (3) Add...

Embodiment 2

[0038] (1) Sorting of raw vegetable waste: Simple sorting of the collected cabbage leaf waste; after the sorted cabbage leaf waste is washed once with water, first chopped and then crushed into a tissue masher Uniform particles with a uniform particle size of about 1 to 2 cm, and then grind them. The C / N of the cabbage leaf waste was 22.35.

[0039] (2) Put 615kg of the pretreated cabbage leaf waste obtained in step (1) into a fermentation device designed by the laboratory, and add 184kg of the substrate of a normal gas-producing biogas digester with an inoculum moisture content of 92.488% for inoculation , Mix to obtain the fermentation raw material, the addition amount of the inoculum (referring to the ratio of the inoculated sludge to the mass of the total reaction material) is 30%, 200ml of water is added to control the total solid content of the fermentation broth to 10%, and then 1g of carbon powder is added. The fermentation reaction produces gas.

[0040] (3) Add NaOH and ...

Embodiment 3

[0045] (1) The pretreatment of raw vegetable waste: the collected cabbage leaf waste is simply sorted; the sorted cabbage leaf waste is washed once with water, first chopped and then crushed into a tissue masher. Uniform particles with a uniform particle size of about 1 to 2 cm, and then grind them. The C / N of the cabbage leaf waste was 22.35.

[0046] (2) Put 533 kg of the pretreated cabbage leaf waste obtained in step (1) into the fermentation device designed by the laboratory, and add 266 kg of the substrate of the normal gas-producing biogas digester with the inoculum moisture content of 92.488% for inoculation , Mix to obtain the fermentation raw material, the addition amount of the inoculum (referring to the ratio of the inoculated sludge to the mass of the total reaction material) is 50%, add 200ml of water to control the total solid content of the fermentation broth to 10%, and then add 1g of carbon powder to proceed The fermentation reaction produces gas.

[0047] (3) Add...

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Abstract

A firedamp preparation method with wasted vegetable as the raw material is provided, which belongs to the energy technical field. The invention the following steps that: at first pretreatment is made on the wasted vegetable as the raw material to adjust the carbon / hydrogen ratio to be 20:1-30:1, then inoculation with the inoculumis carried out, followed by mixing, to obtain the fermented raw material, then water and carbon powder are added for fermentation, with the original pH of fermentation liquid adjusted to be 6.5-7.5, then put into a sealed fermentation device, and immersed in a thermostatic water bath, to carry out the perfect mixing liner wet aerogenous fermentation, to produce the firedamp after 1-2 days, fermentation is carried out for 20-60 days, and the gas is collected with drainage method. The invention accomplishes sufficiently the utilization of wasted vegetable for resourcesiation, reduction and innocuity, and transforms the vegetable harming the environment into biological resources, which produces firedamp as the clean burnable energy and excellent organic fertilizer through anaerobic fermentation.

Description

Technical field [0001] The invention relates to a method in the field of energy technology, in particular, to a method for preparing biogas by fermenting vegetable waste as a raw material. Background technique [0002] With the adjustment of the rural industrial structure and the continuous improvement of the living standards of urban residents, the planting of vegetable crops accounts for an increasing proportion of agriculture, but a large number of poor-quality vegetables and leaves and roots produced during the processing of clean vegetables , Stems and fruits will eventually become solid waste, causing waste of resources and environmental pollution. The total solid content of vegetable waste is 8%-19%, and the content of volatile solids accounts for more than 80% of the total solids. The main types of biomass are 75% carbohydrates and hemicellulose, 9% cellulose and 5%. The lignin, which sugars include monosaccharides, disaccharides, polysaccharides (such as starch) and so o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCY02E50/343Y02E50/30Y02W10/20
Inventor 刘荣厚王远远
Owner SHANGHAI JIAO TONG UNIV
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