Landfilling ash/sludge mixtures

The geotechnical properties of a mixture of municipal solid waste incinerat or bottom ash and municipal wastewater treatment plant sludge was investiga ted for a proposed ash/sludge secure landfill. The components as well as mi xtures ranging from 10:1 to 5:1 (ash:sludge, by volume) were evaluated, whe re appropriate, for a number of geotechnical index and mechanical propertie s including particle size, water content, specific gravity, density-moistur e relationships, shear strength, and compressibility. The results from a co mpactibility study and stability analysis of the proposed landfill were use d to help approve a landfill codisposal concept; a full-scale facility was constructed and is currently operating successfully.