Biodegradation of Recalcitrant Organic Matters under Sulfate Reducing and Methanogenic Conditions in the Municipal Solid Waste Landfill: Continuous Experiments

概要

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In order to assess the progression of the degradation characteristics of cellulose and lignin under sulfate reducing and methanogenic conditions, four pilot scale simulated landfill columns were prepared and operated.<BR>According to the results of this research, very favorable pH and extreme reducing conditions prevailed in partially and fully saturated sulfate reducing reactors.<BR>Higher concentrations of hydrolysis products of cellulose (i.e., glucose) and lignin (i.e., aromatic lignin derivatives) along with higher COD and TOC in the leachates from the sulfate reducing columns as compared to those from the methanogenic columns, indicated a faster rate of mineralization of cellulose and lignin loaded in the columns.<BR>In the sulfate reducing columns, methane and carbon dioxide gas production was effectively suppressed.