AEROBIC DEGRADATION OF ORGANIC MUNICIPAL SOLID WASTE IN LANDFILLS

摘要

PURPOSE: An early stabilization method of waste landfill using aerobic microorganism is provided, which can shorten the stabilization time by more than 50 % by converting the anaerobic state in the landfill into an aerobic state so that aerobic microorganism can decompose organic matter contained in waste and enables the control of the temperature that is closely connected to proliferation of microorganism by only leachate or water, so that even a large scale waste landfill can treat by aerobic microorganism cheaply. CONSTITUTION: The system and method comprise the followings: (i) an aerobic sanitary landfill which has many vertical air feeding wells that are connected to air compressing part at the top and has extruding part with many through holes for feeding air into the lower layer of waste in the landfill and many vertical leachate feeding wells that are connected to leachate storage tank at the top and has many effluent part with many holes for feeding leachate into the upper and middle layers of waste in the landfill ; (ii) a step of feeding leachate or water into the landfill through leachate feeding wells to make the moisture content of waste reach 40-60 % and the temperature rise to 35 deg.C; (iii) a step of feeding air; (iv) a step of high temperature aerobic decomposing by keeping the temperature and moisture content at 50-65 deg.C and 40-60 % respectively; (v) a step of sterilizing pathogenic bacteria by keeping the temperature at 55-68 deg.C for a time; and (vi) a step of mature by feeding liquid nutrient based on carbon compounds for decomposing non-biodegradable organic matter.