ASSESSMENT OF MSW LANFILL STATE FOR SUBSTANTIATION OF MONITORING IN POST-REHABILITATION PERIOD

Galitskaya I.V.^*1, Putilina V.S.^*1, Kostikova I.A.^*1

¹ Sergeev Institute of Environmental Geoscience, Russian Academy of Sciences, Moscow, Russia

By the example of a rehabilitated MSW landfill, an attempt was made to substantiate the importance of engineering geological and engineering ecological survey for obtaining data on the current hydrogeochemical situation and its probable changes in future in order to select rehabilitation measures and monitoring programs in the post-rehabilitation period. The MSW landfill “Dubna Pravoberezhnaya” was chosen as the object of research. The results of studying the chemical composition and contamination of filtrate, groundwater and soils at the test site are presented. An approach to assess the state of landfill body and groundwater upon lacking data is considered. Based on the field and calculation results obtained, the stages of landfill body decomposition at the time of the study were determined, i.e., the stage of acetogenesis, in some areas, and the stage of active methanogenesis, in others. The features of chloride ion, heavy metals, and nitrogen compounds behavior in groundwater were analyzed. The contamination level of the surface soil layer is analyzed, the main geochemical associations of heavy metals are determined, and the soil hazard as a secondary source of groundwater pollution is assessed. The results of the assessment of the landfill body and groundwater state proved the need to compile a more complete and representative list of indicators and components for a reliable representation of the current situation in the territory of MSW landfills.

Key words: municipal solid waste, landfill, groundwater contamination, rehabilitation, managing decisions

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