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A method for controlling anaerobic fermentation and acidification of organic waste

A technology of organic waste and anaerobic fermentation, applied in the field of biogas, can solve problems such as hysteresis, achieve the effects of maintaining coordination, inhibiting excessive reproduction, and reducing gas production hysteresis

Active Publication Date: 2020-07-10
INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a method for controlling the anaerobic fermentation and acidification of organic garbage, which solves the fermentation deterioration and gas production delay caused by the accumulation of organic acids in the anaerobic fermentation process of organic garbage, and improves the efficiency of anaerobic fermentation of garbage and biogas production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1: Rural organic domestic waste, TS 16-18%.

[0075] The main components of rural organic domestic waste are kitchen waste, vegetables, fruits and leaves, and paper.

[0076] A method for controlling acidification in the anaerobic fermentation process of organic domestic waste in rural areas, including the following steps:

[0077] (1) According to the TS concentration of the garbage, the garbage is classified as a type of garbage, and the sorted organic garbage is crushed to 1-2 cm for later use;

[0078] (2) Add 50% of the inoculum to the garbage, and add the alkali production promoting bacteria agent, the mass ratio of the alkali production promoting bacteria agent to the organic garbage is 1:200.

[0079] The alkali production-promoting bacterium agent is prepared by mixing the fermented liquid obtained from Bacillus licheniformis, Bacillus cereus, and Bacillus subtilis through liquid fermentation respectively, and the total number of effective viable bacte...

Embodiment 2

[0087] Example 2: Intensive vegetable area vegetable waste garbage, TS 20-23.

[0088] The main components of vegetable waste in the intensive vegetable area are vegetable stalks, leftover leaves, and leftover fruits and vegetables.

[0089] A method for controlling acidification during anaerobic fermentation of vegetable waste in intensive vegetable areas, including the following steps:

[0090] (1) According to the TS concentration of the garbage, the garbage is classified as type B garbage, and the sorted organic garbage is crushed to 1-2 cm for later use;

[0091] (2) Add the inoculum with 25% TS content of the garbage to the garbage.

[0092] (3) The above materials are fully stirred and mixed, and put into a garage-type anaerobic fermentation reactor for batch fermentation. The fermentation period is 30d.

[0093] (4) Add the alkali production-promoting bacteria agent on the 3rd day of fermentation, and the mass ratio of the amount of the alkali-genesis promoting bact...

Embodiment 3

[0100] Embodiment 3: disperse farmers' organic waste, TS 25-30%.

[0101] The main components of organic waste from scattered farmers are livestock and poultry manure, straw, and organic domestic waste.

[0102] A method for controlling acidification in the anaerobic fermentation process of organic waste from dispersed farmers, including the following steps:

[0103] (1) According to the TS concentration of the garbage, the garbage is classified as C-type garbage, and the sorted organic garbage is crushed to 1-2 cm for later use;

[0104] (2) Add water or biogas slurry to the garbage to dilute the TS to 22%, and add an inoculum with a TS content of 30% to the garbage.

[0105] (3) The above materials are fully stirred and mixed, and put into a garage-type anaerobic fermentation reactor for batch fermentation. The fermentation period is 33d.

[0106] (4) On the 4th day of fermentation, the alkali production-promoting bacteria agent was added, and the mass ratio of the amount...

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Abstract

The invention relates to an acidification control method for anaerobic fermentation of organic refuses. The organic refuses of different concentrations are fermented through different fermentation concentrations, different amounts of inoculum and different anaerobic fermentation devices by using different treatment methods, the appropriate biogas slurry backflow concentration is adopted, an alkali production promoting bacterium agent is added to achieve the appropriate condition for fermentation of the refuses, the condition that whether acidification is conducted or not is judged through the pH value and the ratio TIC to VFA in the fermentation process of the refuses, and through the adjustment of simple technical measures, the acidification state of the system is guaranteed to be adjusted in time, and the organic refuses are normally fermented. The pertinence of the method is strong, the microbial flora in the anaerobic fermentation process of the organic refuses is adjusted through the method for combining the microbial technology and the technical skills, the technical problems of fermentation deterioration and aerogenesis delay, caused by the accumulation of organic acids, are solved, and the anaerobic fermentation efficiency of the refuses and the biogas output are improved.

Description

technical field [0001] The invention relates to a method for processing organic domestic waste, in particular to a method for controlling anaerobic fermentation and acidification of organic waste, and belongs to the technical field of biogas. Background technique [0002] With the development of the economy and the improvement of living standards, the output of domestic waste in urban and rural areas has increased sharply, and the composition of waste has also undergone major changes. According to reports, 75% of the garbage is biodegradable organic waste. The problem of garbage, especially the pollution of urban organic garbage has become a global public hazard, and solving the problem of urban organic garbage disposal has become a hot and difficult issue of social concern. [0003] At present, urban organic waste treatment technologies mainly include sanitary landfill, incineration and biological treatment. Traditional landfill treatment has problems such as land occupat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C12Q3/00C12R1/10C12R1/125C12R1/085
CPCC12P5/023C12Q3/00Y02E50/30
Inventor 姚利付龙云王艳芹杨光袁长波张云廷
Owner INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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