Effects On Stabilization Of Body Of Landfill, Co-disposal Of Municipal Solid Waste And Sewage Sludge, Leachate Recirculation

With increasing of municipal solid waste, and shorting land for landfills .To promote biodegradation of MSW can make enlarge space of landfill, shorten periods of stabilization, release strains of lack lands. Municipal solid waste biodegradation mostly depends on micro-organisms .Consider there were so much micro-organism in sewage sludge, that it can accelerate waste to biodegrade and short periods of stabilization on body of landfills, and enlarge storeroom of landfills. So co-disposal of municipal solid waste and sewage sludge was studied. To deal with Leachate, Leachate recirculation was studied at the time. Biodegradation and settlement of body of landfills recycled were studied.The particular content includes:(1) Index of physical, biochemistry, etc., were analyzed, and the results indicated it was benefit to co-disposal of municipal solid waste and sewage sludge, enlarge settlement of landfills body.(2) The rate of biodegradation and settlement of landfill body is not increase with the sewage sludge added. There was a best ratio about sewage and municipal solid waste.(3) If the volume of sewage sludge added was great, organic matter that can be degraded to ammonia, and concentration was very high, degradation was restrained by high concentration of ammonia.(4) Leachate recirculation can make concentration of COD, NH₄⁺,etc indexes very high in short periods.(5) A part of organic matter can be relieved through leachate recirculation, but ammonia can be cumulated. Organic matter load of leachate recirculation was heavy, there was no evidence effect body of landfills settlement.