Method and system for preparing rubbish biological mulching soil material of landfill yard methane emission reduction

A technology for covering soil and landfills, which is applied in the field of preparation of landfill covering materials, can solve the problems of lack of unorganized methane and emissions, and achieve the effects of simple operation, reduction of methane emissions, and simple preparation methods

Inactive Publication Date: 2009-04-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortage of landfill covering soil and a large amount of unorganized methane emissions, the present invention provides a method and system for preparing garbage biological covering soil materials for metha...

Method used

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  • Method and system for preparing rubbish biological mulching soil material of landfill yard methane emission reduction
  • Method and system for preparing rubbish biological mulching soil material of landfill yard methane emission reduction

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preparation example Construction

[0018] The preparation method of the garbage biological covering soil material for methane emission reduction in landfills of the present invention comprises the following steps: screening and pre-processing the biologically treated garbage such as bioreactors or simple garbage landfills, removing large particles, and removing the garbage. Transfer to the step-type intermittent aeration reactor for intermittent aeration, and pass the leachate generated through the water distributor to adjust the humidity of the garbage to 30-60%, so that the organic matter in the garbage can be further improved under the action of anaerobic and aerobic microorganisms. Degradation, the organic matter content is reduced to 10-20%. At the same time, the methane generated by the anaerobic degradation of the garbage in the reactor is used to domesticate the methane oxidizing microorganisms in the garbage, and the methane oxidation performance is improved. Finally, the garbage treated by the stepped i...

Embodiment 1

[0025] Such as figure 1 As shown, the garbage treated by the bioreactor is pretreated by drum sieve to remove large particles, such as large stones, plastics, fiber fabrics, etc.; The conveyor belt 2 is transported to the feed hopper 3 of the stepped intermittent aeration reactor 8, and the feed gate 4 is opened to send the garbage into the stepped intermittent aeration reactor 8; the movable ladder of the stepped intermittent aeration reactor 8 The plate 10 has a small round hole with a diameter of 7 cm, and a movable mushroom plug is arranged inside. The inclination of each step plate is 3%; One layer of bamboo strips, on which lay 20cm thick prepared garbage bio-covering soil material; after feeding, close the feed gate 4, every 8 to 10h, pass through the air blower at 0.1m 3 / (min·m 3 ) is aerated from the bottom of the reactor for 2-4 hours; and the leachate produced is sent to the water distributor 7 at the top of the step-type intermittent aeration reactor 8 through t...

Embodiment 2

[0027] In order to determine the methane oxidation performance of the prepared garbage biological cover soil, an experimental study was carried out.

[0028]Adopt the rural house refuse after bioreactor anaerobic fermentation process 7 months, carry out the sieve screening pretreatment of 4cm, remove large particle, as bulky stone, plastics, fiber fabric etc.; Open feed gate 4, will The garbage after sieving and pretreatment is transferred to the step-type intermittent aeration reactor 8. The movable step plate 10 of the step-type intermittent aeration reactor 8 has a diameter of 3 cm small round holes, and the slope of each step plate is 2 cm. %; the bottom cover plate of the clean air cover top 6 has a diameter of 3cm small round hole, and a layer of bamboo strips is laid on the cover plate, and the garbage biological covering soil material prepared by laying 10cm thick is laid on it; after feeding, close the feed gate 4. Every 8 to 10 hours, use 0.06m 3 / (min·m 3 ) from t...

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Abstract

The invention discloses a method and a system for preparing a garbage biological earth covering material for emission reduction of methane in a landfill site. The method comprises the following steps: transferring garbage into a step-type intermittent aeration reactor, performing intermittent aeration on the reactor, and making the generated percolate pass through a water distributor to adjust humidity of the garbage, so as to further degrade organic substances in the garbage under the action of anaerobe and aerobe; at the same time, using the methane generated by anaerobic degradation of the garbage in the reactor to tame methane oxidized microbe in the garbage and improve oxidizing property of the methane; and finally twice sieving the garbage after being treated by the step-type intermittent aeration reactor to remove impurities without or with low methane oxidation activity. The method not only can tame the methane oxidized microbe in the process required by re-degradation of the garbage, and improve oxidizing property of the methane, but also use wastes after biological treatment of the garbage as raw materials, can achieve sustainability and reproducibility of biological treatment facilities for the garbage with low cost, and avoid agriculture competing soil resources.

Description

technical field [0001] The invention relates to a preparation method of a landfill covering material, in particular to a preparation method and system for a landfill bio-covering soil material for reducing methane emission in a landfill. Background technique [0002] Landfills are a significant anthropogenic source of methane to the atmosphere. In many developed countries and regions, landfills are the largest source of anthropogenic methane emissions, such as the United States and Europe, where methane emissions from landfills account for 37% and 30% of anthropogenic methane emissions, respectively. In my country, landfill treatment is the main treatment method for domestic waste, and methane emissions from landfills account for 17.3% of the total methane emissions. is also increasing. Therefore, seeking countermeasures to reduce methane emissions from landfills is one of the hot issues currently being researched by scholars at home and abroad. Recycling landfill gas (ene...

Claims

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Application Information

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IPC IPC(8): B09B1/00B09B3/00
Inventor 何若沈东升楼斌邱才娣郑元格
Owner ZHEJIANG UNIV
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