WASTEWATER | HEAT RECOVERY 1.8 1.6 Energy potential (TWh/y) 1.4 1.2 1 0.8 0.6 0.4 0.2 0 1 CJ References: 1 S Farman Ali and A Gillich, The potential of the heat recovery from urban sewage wastewater for use in residential and commercial buildings, BSRIA Net Zero Building Centre, London South Bank University. Presented at the 2020 CIBSE-ASHRAE Technical Symposium. 48 May 2021 www.cibsejournal.com CIBSE May 21 pp46-48 Sewage power Supp.indd 48 23/04/2021 16:07