Contents: Policy on municipal sludges; Sludge incineration systems for purification and resource recovery; Management of oil sludge from a refinery waste water treatment plant; Modern state and principal trends in technology development for Washington sludge treatment; Management and disposal of residuals from treatment of industrial wastewaters; Sludge considerations in the development of industrial effluent; Thickening and dewatering of waste water sludges by vibro filtration method; Municipal sludge management research program in the U.S.A.; Inorganic suspended sludge dewatering; Dewatering of sewage sludge by means of centrifuges; Thermal drying of dewatered sewage sludge; Aerobic stabilization of activated sludge; Thickening of sludges; Dissolved air flotation thickening as practiced in the U.S.; Utilization of municipal sludge in agriculture; The dependence of dewatering process on aqueous properties of sludges; Main principles of selection of wastewater sludge treatment methods depending on its properties; Processing and disposal of industrial sludges from treatment of ferrous metallurgy wastewaters.