A composite covering material for landfill and application method thereof

Abstract

The invention discloses a complex cover material for a refuse landfill. The complex cover material is composed of charcoal, mineralization garbage and incineration ash which are uniformly mixed, the mass ratio of the charcoal to the mineralization garbage to the incineration ash is (3-4) to (3-5) to (1-4), the filling density of the complex cover material is 0.6-1.1 g / cm<3>, the particle size range of the cover material is 5-20 mm, and the specific surface area of the material is 150-280 m<2> / g. The complex cover material provided by the invention utilizes the carrier action of the charcoal, the inoculation action of deodorization microorganisms of the mineralization garbage and the partial hydration gelatification of the incineration ash, so that the stench release amount of garbage and the discharge of greenhouse gases are greatly reduced, and vegetations are supplied with good nutrition; the complex cover material has the advantages of low cost, simple preparation and easy disposition; meanwhile, the mineralization garbage and sludge in a landfill are fully utilized, the utilization of local materials is realized, the effects of recycling garbage, treating waste with waste, reducing the garbage volume occupancy of the landfill and improving environmental protection are achieved, and social benefits and economic benefits are greatly improved; the complex cover material provided by the invention is suitable for the landfill covering treatment of garbage.

Description

technical field [0001] The invention relates to a material used for solid waste treatment and disposal, in particular to a composite covering material used for landfills and an application method thereof, belonging to the technical field of environmental protection. Background technique [0002] After nearly 30 years of development, although landfill technology has been greatly developed, the problem of secondary environmental pollution caused by it is still very prominent, especially gas phase pollutants (including both strong irritating odorous substances and Including flammable and explosive greenhouse gases), the disorderly discharge has seriously affected the lives of local residents, and the public has very strong reactions. The survey and statistics of 329 cities across the country show that the odor of most landfills in my country generally does not meet the discharge requirements at the factory boundary stipulated in the "Comprehensive Discharge Standard for Odor Po...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems of high soil demand, low odor removal rate, and lack of nutrient elements in the existing landfill covering layer, and provide a composite covering material for landfill and its application method. The carrier function of biochar, the deodorizing microbial inoculation function of mineralized garbage and the partial hydration gelation of incineration ash meet the requirements of providing a nutrient layer, reducing stench and even methane oxidation, and achieving low price and high quality, simple structure and long life. Long-term effect, thus greatly improving social and economic benefits

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