Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Fine-coal-aided centrifugal dewatering of waste activated sludge

Journal Article · · J. - Water Pollut. Control Fed.; (United States)
OSTI ID:5902877
When waste activated sludge is dewatered for disposal by combustion, the final product concentration is of the utmost importance. Tests carried out using a new slow-speed, co-current flow solid bowl conveyor centrifuge showed that cake solids concentrations of 18-23% total solids could be achieved on a waste activated sludge feed using polymers. With fine coal addition, cake solids concentrations of 25-37% total solids were obtained with 0.1-0.3 kg coal/kg sludge solids. Depending on the operating exhaust temperatures of the furnace, autogenous conditions can be produced with coal additions of 0.05-0.2 kg coal/kg sludge. Fine coal addition to centrifuges produces much better final product concentrations than ash or coal additions to vacuum filters or filter presses.
OSTI ID:
5902877
Journal Information:
J. - Water Pollut. Control Fed.; (United States), Journal Name: J. - Water Pollut. Control Fed.; (United States) Vol. 55:2; ISSN JWPFA
Country of Publication:
United States
Language:
English