Technological process of back pouring percolate to speed stabilization of old landfill site

The invention relates to a technology for a landfill and a process method, which is applied in the field of leachate recharge to accelerate the stabilization process of an old landfill, and can solve the problems of difficulty in meeting the requirements for the quality of the treated effluent, high construction and operation costs, and poor biodegradability. To achieve the effect of improving effluent quality, simple and easy construction, and accelerated degradation

Inactive Publication Date: 2007-08-22
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

Due to the poor biodegradability of leachate from old landfills, it is difficult for traditional biological treatment technologies such as activated sludge to meet the quality requirements of treated effluent.
Physical and chemical treatment technology has better treatment effect, but the construction and operation costs are higher
In addition, after the old garbage dump was closed, due to the adoption of final site coverage and the construction of rainwater drainage facilities, the amount of leachate production has decreased year by year. Idle equipment and waste of resources

Method used

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  • Technological process of back pouring percolate to speed stabilization of old landfill site
  • Technological process of back pouring percolate to speed stabilization of old landfill site
  • Technological process of back pouring percolate to speed stabilization of old landfill site

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Effect test

Embodiment 1

[0042] Pilot test of a bioreactor landfill in South China

[0043] Since 2002, Tsinghua University has carried out a pilot-scale anaerobic bioreactor landfill stabilization study using four 30t test columns in a landfill in the south as the research object. Frequency, under the condition of leachate recharge, the change of water quality of the leachate outflow from the test column, the generation of landfill gas and the degradation of landfill waste. According to actual measurements, the wet recombination of domestic waste in Shenzhen is: kitchen waste 67.01%, bamboo wood 3.71%, fabric 2.30%, paper 2.62%, foam 1.76%, metal 0.86%, plastic and rubber 19.90%, glass and ceramics 1.83%. Kitchen waste mainly contains easily degradable organic matter such as cellulose and hemicellulose, which can be degraded after one to two years, while organic matter such as bamboo and wood is mainly composed of lignin, which is difficult to degrade.

[0044] The three recharge test columns R1, R2...

Embodiment 2

[0047] Closure and remediation project of an old garbage dump in the south

[0048] A landfill in the south, with a service life of 10 years and a total landfill volume of 1.73 million m 3 , the landfill area is 81,500 m 2 . The landfill was closed in 2005. HPDE membrane was used as the anti-seepage layer on the surface, and there were drainage and flood interception engineering facilities in the site, and an air guide system.

[0049] According to field data, 7 horizontal recharge units are used for leachate recharge. After one year of recharging, the results showed that the quality of the leachate effluent reached the national third-level standard for comprehensive sewage discharge, and the degree of waste degradation was significantly improved.

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Abstract

The present invention relates to the technological process of back pouring percolate to old landfill site for speeded stabilization and belongs to the field of environment protection technology. The technological process includes setting rain way guiding and draining facility in landfill site and sealing simply, and back pouring percolate through horizontal blind ditch with storage tank of polyethylene to speed the garbage stabilization. The technological process can speed the degradation of organic matter in the landfill site and makes it possible to omit special percolate treating facility.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method for accelerating the stabilization of old garbage landfills by leachate recharge. The method performs leachate recharge in old garbage dumps, and proposes a recharge method with a horizontal recharge unit as the main body , realize the uniform distribution of recharge leachate, increase the moisture content of the garbage, accelerate the stabilization process of the old landfill, and reduce the leachate pollution load through recharge, improve the water quality of the leachate, and utilize the landfill waste Water capacity and site closure works reduce the amount of leachate produced, and ultimately achieve the goal of rapid stabilization of old waste dumps and direct discharge of leachate. Background technique [0002] At present, the main treatment method of municipal solid waste in my country is sanitary landfill. Simple landfills account ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B5/00E03F1/00
Inventor 蒋建国黄云峰张妍
Owner TSINGHUA UNIV
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