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

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 thegarbage 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 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 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 (energy recovery in ...

AI Technical Summary

Problems solved by technology

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 methane emission reduction in landfills, so that the biologically treated garbage can be "waste" "While being used as an alternative covering material for landfills, it can effectively reduce the emission of greenhouse gas methane from landfills

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