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Power generation technology with biogas produced by mixed fermentation of excrement and straws of distributed swine breeder

A technology of mixed fermentation and biogas power generation, applied in fermentation, biological sludge treatment, waste fuel, etc., can solve the problems of insufficient use of biogas, low biogas rate, and thin manure concentration, and achieve resource utilization Effect

Inactive Publication Date: 2014-08-27
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, there are still many problems in the practical application of this technology in the decentralized small and medium-sized pig farmer manure, and it is even difficult to apply
For example: ①The excrement produced by decentralized small and medium-sized pig farmers is mostly a mixture of excrement and flushing water, the concentration of feces is relatively thin, and the rate of biogas production through anaerobic fermentation is low; ②The biogas slurry, biogas residue, Biogas is not fully used, resulting in waste of resources, and even secondary pollution in the environment of direct discharge

Method used

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  • Power generation technology with biogas produced by mixed fermentation of excrement and straws of distributed swine breeder
  • Power generation technology with biogas produced by mixed fermentation of excrement and straws of distributed swine breeder

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The excrement of decentralized pig farmers is collected by a manure collection truck and transported to the manure storage tank. When the collected amount reaches 25t, it is pumped to the slurry mixing tank by a mud pump, and then 0.8t of rice straw is crushed and mixed with 2.5kg of commercial hydrogen production. Add the mixed bacterial agent of acid bacteria and methanogens to 25t of distributed pig farmer manure, stir it evenly with a mixer, and then use a sludge pump to pump it into an anaerobic fermentation tank for anaerobic fermentation. The effective volume of the anaerobic fermentation tank is 300m 3 , treated by microbial anaerobic fermentation, the biogas produced is treated by dry desulfurization tower and gas-water separator, and then stored in biogas storage tank, with an output of 760m 3 . The biogas can be used to generate electricity by biogas generator set, which can generate 1292KWh.

Embodiment 2-5

[0031] The difference between embodiment 2-5 and embodiment 1 is that the excrement collection amount of the raw material dispersed pig farmers is different, the types of crop stalks used are different (wheat, corn, sesame, rice), the effective volume of the anaerobic fermentation tank is different, and the mixed bacterial agent ( Hydrogen-producing acid-producing bacteria and methanogenic bacteria) have different dosages, and other process parameters and treatment methods are the same. Table 1 shows five examples of decentralized pig farmer manure and straw mixed fermentation biogas power generation technology.

[0032] Table 1 Example of biogas power generation technology using decentralized mixed fermentation of pig farmer manure and straw

[0033]

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Abstract

The invention discloses a power generation technology with biogas produced by mixed fermentation of excrement and straws of distributed swine breeders. The power generation technology mainly solves the excrement processing problem and the processing problem of the abandoned crop straws of the distributed swine breeders in a rural area, after the excrement of the distributed swine breeders is collected, the smashed abandoned crop straws and mixed microbial inoculums (hydrogen and acid production bacteria and methane production bacteria) are added for conducting fermentation for producing the biogas, the generated biogas is used for power generation with a biogas power generation set, biogas residues and biogas slurry are returned to the field to be used for planting crops. By means of the processing technology, the excrement and the abandoned crop straws of the distributed swine breeders are processed, power generated by the biogas is connected into an area power grid, and certain economical benefits can be achieved; meanwhile, the biogas residues and the biogas slurry are absorbed by farmlands, the crop yield is improved, and the good environmental and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a decentralized technology for generating biogas by mixed fermentation of manure from pig farmers and straw. Background technique [0002] Nowadays, there are still large and small non-scale pig farmers scattered in the rural areas of our country, and the number of pigs on hand generally ranges from dozens to hundreds of pigs. Due to the small scale of this kind of decentralized pig farmers, they all use non-standardized pig houses, and there is no complete disinfection system for large farmers. They only wash the farms with clean water every day to achieve the purpose of purification, resulting in very low concentration of pig manure, which is not available. Conditions for producing biogas by fermenting in a fermenter. Therefore, most of them are discharged randomly and flow into farmland, ditches, and rivers, which overwhelms the surrounding farmland, overgr...

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 张文艺陈萍冯国勇徐泽锋朱丽娜管红良
Owner CHANGZHOU UNIV
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