Amendment of biosolids with waste materials and lime: Effect on geoenvironmental properties and leachate production.

摘要: Residuals from wastewater treatment operations (biosolids) were mixed with lime, fly ash, lime kiln dust, or two smelter slags to assess their efficacy as potential stabilisation agents by assessing effects on the shear strength, compressibility, and solids content of mixtures. In addition, minerals formed leachate produced during determined. Tests performed explore change geoenvironmental properties amended biosolids, while under pressure, at different scales using laboratory, pilot field scale tests. The settlement characteristics biosolids a range applied pressures determined consolidometer. All mixtures showed higher strength than unamended containing combination 20% ash giving highest (up eightfold) increase in that dust showing lowest twofold). only gave second fourfold), but largest amount leachate, level dissolved calcium. correlated availability calcium oxide which lead carbonate formation, accompanied production consolidation. Copper, nickel zinc concentrations increased alkaline additives corresponded pH DOC levels. Nonetheless, within New Zealand regulatory limits for Class A landfills.