Surahamar (Suède) : 50% des cuisines équipées dans une ville

Water and Environment Journal. Print ISSN 1747-6585 Surahammar: a case study of the impacts of installing food waste disposers in 50% of households 1 2 2 2 ˚ Tim D. Evans, FCIWEM , Per Andersson , Asa Wievegg & Inge Carlsson 1 2 Tim Evans Environment, Stonecroft, Ashtead, UK and Surahammars KommunalTeknik AB, Surahammar, Sweden Keywords ammonium; biogas; BOD; COD; cost; food waste; in-sewer process; landfill directive; wastewater treatment; water resources. Correspondence Tim D. Evans, Tim Evans Environment, Stonecroft, Park Lane, Ashtead KT21 1EU, UK. Email: tim@timevansenvironment.com doi:10.1111/j.1747-6593.2010.00238.x Introduction Abstract This paper reviews 15 years of sewage works’ monitoring data to assess the effect of installing insink food waste disposers (FWD) and how these effects compare with the published scientific literature. For the first time, it has been possible to assess at full scale the load/cost transfer from solidwaste to waste water management. Within a period of 10 years, 50% of households in the town of Surahammar in Sweden chose to have FWD installed as their means of managing their kitchen food waste. The drainage from the households feeds a single wastewater treatment works (WwTW) that comprises primary settle ment, activated sludge, followed by chemical phosphate precipitation and mesophilic anaerobic digestion.