PRODUCTION OF POWER STATION FUEL FROM SEWAGE SLUDGE.

A description is given of various means of achieving more extensive mechanical dewatering of sewage sludges. The heat content of the sludge solids can become available for combustion processes. The sludge filter cakes obtained by the ″CarboSed″ process can be disposed of with minimum energy consumption by fluidized bed combustion or be used after appropriate preparation as a combustible in coal-fired power stations, with full exploitation of their heat content for generation of steam and electric current. Partial substitution of primary energy sources such as coal and fuel oil by sludge filter cake is feaible in all cases. Thus, the processes make a contribution to the saving of energy resources and to the disposal of sludge.