Dry fermentation method for urban garbage

A technology for municipal waste and waste drying, applied in fermentation, biological sludge treatment, waste fuel, etc., can solve the problems of fermentation failure, low biogas production efficiency, and unsatisfactory uniformity, and achieve the effect of improving efficiency

Inactive Publication Date: 2017-06-16
SUZHOU TANGSHI MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Municipal solid waste mainly refers to urban feces, kitchen waste from the catering industry and fruit and vegetable waste from the market, etc., which have high solid content, poor fluidity, and unsatisfactory uniformity
In this way, during dry fermentation, it is easy to cause microbial growth and metabolism imbalance, resulting in low efficiency of biogas production and even fermentation failure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] The method for the dry fermentation of urban refuse of the present embodiment may further comprise the steps:

[0013] 1) Mix the sorted and pulverized urban waste and dry sludge at a weight ratio of 3:1 to obtain the first mixture, preheat the first mixture with steam and put it into an anaerobic fermentation tank for pre-fermentation, The preheating temperature is 30-40°C;

[0014] 2) The first mixture is discharged after staying in the anaerobic fermentation tank for 15-20 days;

[0015] 3) Mix the discharge with the sorted and pulverized urban waste, dry sludge, and inoculum at a weight ratio of 1:10:1:2 to obtain a second mixture, and pass the second mixture through steam pretreatment After heating, put it into an anaerobic fermentation tank to generate biogas, and the preheating temperature is 30-40°C;

[0016] 4) The first mixture stays in the anaerobic fermentation tank for 15-30 days. During the fermentation process, the biogas slurry at the bottom of the ana...

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PUM

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Abstract

The invention relates to a dry fermentation method for urban garbage. The method includes the steps of: mixing urban garbage, dry sludge and an inoculums to obtain a first mixture, preheating the first mixture, then putting the preheated mixture into an anaerobic fermentation tank; letting the first mixture stay in the anaerobic fermentation tank for 15-20d, and then performing discharge; mixing the discharged substance with urban garbage and dry sludge again to obtain a second mixture, preheating the second mixture, and then putting the second mixture into an anaerobic fermentation tank; and during the 15-30d stay of the first mixture in the anaerobic fermentation tank, in the fermentation process, letting the biogas slurry at the bottom of the anaerobic fermentation tank flow back to the anaerobic fermentation tank top to spray the second mixture.

Description

technical field [0001] The invention relates to a method for dry fermentation of urban garbage, which belongs to the technical field of urban garbage treatment. Background technique [0002] Municipal solid waste mainly refers to urban feces, kitchen waste from the catering industry and fruit and vegetable waste from the market, etc., which have high solid content, poor fluidity, and unsatisfactory uniformity. In this way, during dry fermentation, it is easy to cause microbial growth and metabolism imbalance, resulting in low efficiency of biogas production, and even fermentation failure. Contents of the invention [0003] The technical problem to be solved by the present invention is: to overcome the disadvantages of the above-mentioned technologies, and provide a method for dry fermentation of urban garbage with high biogas production efficiency. [0004] In order to solve the problems of the technologies described above, the technical solution proposed by the present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCC02F11/04C12P5/023Y02E50/30
Inventor 唐全林
Owner SUZHOU TANGSHI MACHINERY MFG
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