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UDC 504.064.47:628.31.4

Chistiakov N. E., Strelkov A. K., Lobanov V. I., Zanina Zh. V.

Processing leachate from municipal solid waste landfills for further utilization


The operation of municipal solid waste landfills produces a negative impact on the environment. The landfill leachate contains high concentrations of mineral and organic substances and, according to many researchers, is highly toxic. The qualitative characteristics of leachate depend on the age of the landfill, climate conditions and season of the year, amount of atmospheric precipitation, fallout pattern and other factors. Undoubtedly, the leachate quality is determined also by the chemical composition of wastes disposed to the landfill. Leachate handling is an urgent problem. Most often leachate treatment to the effluent quality meeting the maximum permissible concentrations for fishery waters is suggested. All the technologies and methods of this direction are fairly complicated and expensive. As a result additional wastes reluctant to utilization are generated. The possibility of using leachate for the landfill irrigation is suggested for consideration. This is the best practice since the effluent is retuned back to the landfill solid which is a natural biological reactor. Pretreatment, leachate saturation with oxygen and its further use for landfill irrigation will provide for reducing the time needed for complete destruction of organic compounds to the formation of humic acids, humate and organic soil; and also reducing significantly the negative impact of landfills on the environment including aquifers. In this case most of leachate evaporates and goes to the atmosphere eliminating any serious impact on it.

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