DRYING OF SEWAGE-SLUDGE - AN IMPORTANT STEP IN WASTE-DISPOSAL

Industrial drying techniques are successfully used processes. They are usually used for the production of base materials for industries such as food, chemical and pharmaceutical. These processes can be transferred without any difficulty for the drying of sewage sludge. Thermal drying as a process for the purpose of water removal is an important link in waste management between sludge production and sludge disposal. Two systems, convection and contact drying, are here compared. Contact drying in the thin film evaporation process is explained. Explanation and proposed uses of the single-and two-stage drying systems will be discussed. Finally a short review of incurred expenses will be given.