Russian Federation
UDC 658.567.1
The article describes the main negative aspects of storing municipal waste at landfills and substantiates the need for their layer-by-layer backfill with inert materials. The main materials used for layer-by-layer isolation were considered and the idea of using techno-soil based on landfill leachate stabilized with blast furnace slag with a mass ratio of components of 1: 1: 0.027 (filtrate, blast furnace slag and coagulant) was proposed. Invitro studies were conducted to substantiate the possibility of using techno-soil as a layer-by-layer insulating material: the chemical and phase composition of the techno-soil was determined; hazard class IV of the waste-based material was established; it was proven that the content of toxic substances in the aqueous extract from the material was lower than or equal to their content in the leachate of landfill; the integral oxidation index was measured and equal to 260 mgO2/l; the particle size of the material, its good compactibility and gas permeability to landfill gases, as well as water permeability to infiltrating atmospheric precipitation were established; the solubility of the material was less than 3 % by weight. Thus, the possibility of using techno-soil based on landfill leachate stabilized with blast furnace slag as an inert material in the operation of solid municipal waste landfills was proven.
municipal waste, solid municipal waste landfill, landfill leachate, blast furnace slag, techno-soil, solid municipal waste landfill isolation
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