CHEMICAL CHARACTERIZATION OF FRESH KILLS LANDFILL REFUSE AND EXTRACTS

The purpose of this research was to chemically characterize refuse and extract samples and to evaluate gas generation from the Fresh Kills Landfill on Staten Island, N.Y., and to use this information to draw conclusions about the overall rate and extent of decomposition within the landfill. The refuse samples were characterized in terms of moisture content, lignin, cellulose, and various selected chemical species. Analysis of the extract samples included measurements of total organic carbon, volatile acids, pH, and other specific materials. Gas-production factors, such as temperature and moisture content, were also studied. Results indicate that refuse samples ranged from basically undecomposed to well decomposed, based on the wide range of cellulose concentrations and cellulose to lignin ratios. Organic parameters in the refuse were strongly correlated to refuse age. Interrelationships between the liquid parameters are generally consistent with published phases of decomposition. For gas-producing refuse samples, moisture contents were significantly higher than for those samples not producing gas. Temperatures between 30-degrees-C and 40-degrees-C were preferable for gas production.