REVIEW ON ANAEROBIC TREATMENT OF MUNICIPAL SOLID WASTE WITH LEACHATE RECIRCULATION

Abstract

Anaerobic bioreactor landfills are the most popular method to treat municipal solid waste as they rapidly stabilize waste, enhance leachate treatment along with increased landfill gas generation for cost-effective energy recovery and reduced post closure maintenance period. Leachate recirculation is one of the methods to apply in bioreactor to eliminate the leachate treatment and ground water contamination. The landfill leachate is characterized by high contents of organic and inorganic compounds which gradually decrease and depict the stabilization of municipal solid waste. Concentrations of these compounds in leachate depends on the type of waste, its susceptibility to dissolution, chemical and biological degradation and the volume of water running through the waste. The objective of this review paper is to highlight the effects of leachate recirculation on waste stabilization in a simulated bioreactor and to depict that the bioreactor efficiently stabilizes the waste mined from dumpsite by enhancing organic degradation