Changes of Pollution Potential During Biostabilization of Municipal Solid Waste as Pretreatment Prior to Landfill

Abstract:

Related indexes of biostabilization,the pretreatment of municipal solid waste (MSW) prior to landfill are determined,and changes of pollution potential for landfill are discussed.After 44 days of biostabilization (active degradation stage and curing stage),the weight of MSW reduces by about 70% (in wet weight).The fractions of the readily degradable organic matters diminish significantly,but the lignocelluloses become the major components,reaching 62% (in dry weight).The biological reactivity value AT4 reduces by 80%.The methane emissions are estimated to decrease by 80%.Both chemical oxygen demand(COD) and total organic carbon(TOC) in the eluates plummet by 90%.TN and NH4—N in the eluates decrease to 60% and 20% respectively.The above results show that the process of biostabilization can reduce the pollution potential for landfill.

Key words:municipal solid waste; biostabilization; pretreatment; landfill pollution