Digesters - Metropolitan Water Reclamation District of Greater Chicago

Energy Consumption at SWRP• Building heating system comprised of extensivesteam piping network operated at 90 psig• Steam is used for building cooling in the summervia absorption chillers• For digester heating, steam is converted to hotwater at each individual digester bank• Heating demands have significant seasonalvariation• Plant electrical consumption is ~ 31 MW withoutmuch seasonal variation