Landfill method for accelerating percolate degradation in landfill site

Abstract

The invention discloses a landfill method for accelerating percolate degradation in a landfill site. The method is characterized by comprising the following steps of: arranging percolate collecting pipes in a non-full flow form, introducing air into a percolate collecting layer and air conducting gabions from the percolate collecting pipes and diffusing the air to a peripheral rubbish body during collection of landfill percolate, and setting the part region in the rubbish body in the landfill site in an aerobic environment and the other regions in a facultatively anaerobic environment and an anaerobic environment to accelerate the degradation of organic matters; at the same time, increasing the height of the percolate collecting layer, forming an artificial aerobiont filter bed on the percolate collecting layer, and forcibly degrading the percolate; and collecting the percolate, spraying percolate backwards onto the surface in the landfilling process of the rubbish, and spraying the percolate backwards to a gas collecting layer on the lower part of a closing and covering system after the landfill site is closed. Due to the adoption of the method, the pollution load of the percolate can be lowered quickly, the percolate water quality is improved, the production amount and the treatment amount of the percolate are reduced, the production of odor and methane emission are reduced, and rapid stabilization of landfill is facilitated.

Description

technical field [0001] The invention relates to the technical field of domestic waste landfill treatment, in particular to a landfill method for accelerating the degradation of leachate in landfill sites. Background technique [0002] At present, the main treatment method of municipal solid waste in my country is sanitary landfill. In 2008, the amount of harmless disposal of domestic waste in my country was 102.16 million tons, of which sanitary landfill accounted for 83.8%. In the next 10 years, my country will have 1,000 small and medium-sized sanitary landfills for domestic waste, with a new landfill capacity of more than 80 million tons and a daily landfill of more than 500,000 tons of domestic waste. [0003] The traditional sanitary landfill is to build an anti-seepage layer at the bottom, on which a 30cm-thick gravel (pebble) layer is usually set as a leachate collection layer, and vertical air guide gabions are arranged at a certain distance to collect landfill gas,...

AI Technical Summary

Problems solved by technology

Traditional sanitary landfill waste degradation is basically in an anaerobic environment, so there are the following disadvantages: (1) The leachate pollution concentration is high, the treatment investment and operation costs are high, the treatment is difficult, and it is difficult for small towns to bear the high investment in leachate treatment (2) The landfill produces a large amount of malodorous gases such as ammonia nitrogen and hydrogen sulfide, which affects the surrounding environment and the use of a large amount of surrounding land; (3) Anaerobic degradation produces a large amount of methane, which is of no use value for landfill gas Small and medium-sized landfills have increased greenhouse gas emissions; (4) Landfills have been stabilized for a long time (more than 40 years), and the land reclamation cycle is long

[0007] However, if the above-mentioned technology is used to treat garbage, due to the limited aerobic area, the degradation rate of leachate is slow, and the garbage stabilization time is still relatively long.

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