Biostore: towards sustainable composite waste reuse
B.K.C. Chan & A.W.L. Dudeney
Imperial College, London, United Kingdom
The paper describes the 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.