ABSTRACT
The paper describesthe construction and monitoring of pilot scale composite emplacements at two sites in Yorkshire, in which designed combinations of coarse mineral (limestone, coal shale or construction & demolition waste) were compacted together with fines (stabilised sewage sludge with fly ash and lime or sodium hydrogen sulphate) within lined systems. Results after 18-24 months indicated that the composites were mechanically and microbiologically stable, and effectively isolated from the surrounding environment. The emplacements - termed Biostore - showed the potential for sustainable waste management by permanent co-utilisation of organic and mineral wastes in civil engineering groundwork for brown field site restoration to amenities or the light built environment.
