Balakina M. Physico-chemical bases of decontamination of landfill leachate by electrochemical and membrane methods

The dissertation is devoted to creating scientific principles for disposal and recycling of multi-component toxic landfill leachate of municipal solid waste (MSW) normative indicators using a complex of physicochemical and electrochemical processes aimed to reduce the contamination risk of groundwater and surface water, and their implementation. The conducted researches have allowed to solve the given task – to create scientific bases of disposal and processing of multicomponent toxic waters of “old” and stabilized landfills of municipal solid waste to normative indicators using a complex of physicochemical and electrochemical processes, on the basis of which the circuit block schemes of complex processing of leachates for Kiev landfills MSW # 1 and # 5 were proposed. Schemes are based on a flexible block principle, which are substructured on application of two membrane methods- electrodialysis and reverse osmosis successfully complement each other. These blocks are preceded by other blocks intended for pre-membrane treatment of leachate: mechanical treatment for the retention of suspended solids; galvanic coagulation for purification from organic pollutants; adsorption finishing removal of low molecular weight organic substances; reagent removal of ammonium; UV irradiation disinfection; microfiltration for delicate purification of suspended particles in order to protect the membrane elements before submitting the leachate to be purified by membrane unit. Considerable attention has been not only landfill leachates purification but also the complex processing of components allocated by refinement.