Air-pressure type percolation instrument for municipal solid waste landfill and use method of percolation instrument

Abstract

The invention discloses an air-pressure type percolation instrument for municipal solid waste landfill and a use method of the percolation instrument and belongs to the field of environmental geotechnical engineering. The percolation instrument comprises a liquid storage chamber, a sample chamber, a base and a support, wherein a liquid inlet hole and an air inlet hole are formed in the top of the liquid storage chamber respectively, a nut is arranged in the liquid inlet hole in a sealed manner, an air inlet valve is arranged in the air inlet hole in a sealed manner, and an adjusting lever is arranged on the air inlet valve; an opening is formed in the lower part of the liquid storage chamber and is in sealed connection with the upper end of the sample chamber, the lower end of the sample chamber is connected with the base provided with water holes, the lower end of the base is arranged on the support, a conical barrel located below the water holes is arranged on the support, and a percolate container is arranged at the bottom of the conical barrel. The percolate is pressurized through air pressure, so that percolation time of the percolate is substantially shortened, besides, the percolation instrument is simple and compact in structure, flexible to operate and good in air impermeability, adsorption blocking rate of anti-seepage slurry can be tested more accurately, and the anti-seepage effect of vertical anti-seepage walls all around the municipal solid waste landfill is checked.

Description

technical field [0001] The invention relates to an anti-seepage slurry material infiltration instrument for landfill, and more specifically, relates to an air pressure infiltration instrument for landfill of domestic garbage and a method for using the same. Background technique [0002] During the landfill process of municipal solid waste, leachate is formed due to the anaerobic decomposition of garbage microorganisms, leaching of precipitation, surface runoff and groundwater infiltration. The composition of the leachate is complex (NH 4 -N, TP, SS, COD Cr 、BOD 5 High concentration of heavy metals such as Hg and Pb) and strong pollution. Once leakage occurs, it will cause serious pollution to the water and soil around the garbage dump. Currently, low permeability (<10 -7 cm / s), good stability, and adsorption and retardation of pollutants (slurry stones are mainly composed of cement, bentonite, fly ash, admixtures, etc.) to establish a vertical anti-seepage around the ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing anti-seepage slurry material infiltration instrument, such as long filtrate infiltration time, complicated operation, and low test accuracy, and provide a pneumatic type domestic waste landfill infiltration instrument and its use method. The technical solution of the present invention uses air pressure to pressurize the leachate, which not only greatly shortens the time of leachate infiltration, but also has a simple and compact structure, convenient and flexible operation, good air tightness, and can more accurately test the The adsorption retardation rate of seepage material is used to test the anti-seepage effect of vertical cut-off walls around domestic waste landfills

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