Treatment of Laundry Wastewater by Physicochemical and Flotation Processes

Laboratory and field studies were conducted to evaluate the capabilities of two commercially available laundromat waste treatment systems to treat laundromat wastes with the possibility of recycling the treated effluent: (a) The Winfair Water Reclamation System (WWRS) involves the addition of alum to a pH of 4, sedimentation, sand filtration, carbon absorption, and passage through ion exchange resins and (b) The American Laundry Machinery Industries (ALMI) system employs chemical precipitation prior to filtration through diatomaceous earth. Lenox Institute of Water Technology (LIWT) designed a physicochemical process system involving mainly the use of dissolved air flotation (DAF) for treating the same laundry wastewater.