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A treatment method for rapid reduction of domestic waste and energy recovery

A domestic waste and energy recovery technology, applied in the direction of waste treatment, solid waste removal, etc., can solve the problems of increased cost, inability to achieve separation, easy corruption, etc., achieve simple separation and reprocessing, and facilitate the effect of secondary separation and recovery

Active Publication Date: 2021-02-02
BIOGAS SCI RES INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is processed by composting or anaerobic digestion, the packaging of plastic bags will be a restrictive factor. If it continues to be sorted to remove plastic bags, the cost will increase exponentially
And because the food waste packed in plastic bags is mainly composed of easily degradable organic matter, it is easy to spoil and breed germs. If you continue to sort, there is a great risk of disease; at the same time, due to the characteristics of raw materials, even if you continue to sort, it will It will not be very thorough, and the usable substances and unusable substances cannot be completely separated, forming a process with high consumption and low energy

Method used

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  • A treatment method for rapid reduction of domestic waste and energy recovery
  • A treatment method for rapid reduction of domestic waste and energy recovery
  • A treatment method for rapid reduction of domestic waste and energy recovery

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Collect 7-day domestic garbage in a certain area of ​​Chengdu, average sampling and pretreatment with broken bags. After testing, the composition ratio is as follows:

[0040] Classification Leaves the fabric Glass Metal non-recyclable paper ashes plastic Kitchen waste Mass ratio 2.50％ 1.60％ 2.60％ 0.40％ 7.30％ 1.60％ 17.90％ 66.10％

[0041] Note: The weight of each part of garbage includes the plastic bags used for packaging.

[0042] The effective volume of the fermentation tank is 80L (dry fermentation tank 64L: 40cm*40cm*40cm+ percolation tank 16L). Put the above-mentioned domestic garbage into the dry fermentation zone of the sequencing batch type anaerobic dry fermentation tank. After testing, this batch feeds 64L and weighs about 41.5kg. After sealing the fermenter, add 40L of pre-acclimated liquid inoculum, connect the gas meter, and ferment at 35±2°C. The leachate is refluxed from the bottom of the sequencing batch anaer...

Embodiment 2

[0051] Collect 7-day domestic garbage in a certain area of ​​Chengdu, average sampling and pretreatment with broken bags. After testing, the composition ratio is as follows:

[0052] Classification Leaves the fabric Glass Metal non-recyclable paper plastic Kitchen waste Mass ratio 3.3％ 2.6％ 1.8％ 1.2％ 7.5％ 37.3％ 46.3％

[0053] Note: The weight of each part of garbage includes the plastic bags used for packaging.

[0054] The effective volume of the fermentation tank is 80L (dry fermentation tank 64L: 40cm*40cm*40cm+ percolation tank 16L). Put the above-mentioned domestic garbage into the dry fermentation zone of the sequencing batch type anaerobic dry fermentation tank. After testing, this batch feeds 64L and weighs about 34.3kg. After sealing the fermenter, add 47L of pre-acclimated liquid inoculum, connect the gas meter, and ferment at 35±2°C. The leachate is refluxed from the bottom of the sequencing batch anaerobic dry fermenter to ...

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Abstract

The invention discloses a treatment method for rapid reduction of household garbage and energy recovery, which includes breaking bags of domestic garbage after rough sorting, putting it into a sequencing batch type anaerobic dry fermentation tank for anaerobic fermentation, and returning leachate , treatment of residues and other steps. The invention can realize the reduction of domestic garbage and energy recovery in a low-cost, fast and efficient manner, not only realizes the innovation of the process route, but also greatly improves the treatment efficiency and greatly reduces the treatment cost.

Description

technical field [0001] The invention belongs to the field of comprehensive treatment of waste and domestic garbage, and in particular relates to a treatment method for rapid reduction of domestic garbage and energy recovery. Background technique [0002] The output of municipal solid waste (MSW) in our country is very large. The existing MSW treatment methods generally include landfill, incineration, and composting, among which landfill is still the most important treatment method. The landfill treatment method has the advantages of simple process and low cost; however, during the landfill process, the odor and methane generated will cause air pollution; the leachate will also cause groundwater pollution; at the same time, it occupies a large amount of land; the degradation time is slow, Disadvantages such as long cycle time. [0003] According to our country's policy guidance and people's living habits, my country's domestic waste has not yet been finely classified and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
CPCB09B3/00Y02W30/20
Inventor 李强邓宇尹小波
Owner BIOGAS SCI RES INST MIN OF AGRI
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