Filter pres and belt pres are the most effective solid-liquid separation systems these filtering system is a method most used in practice. The materials are used in filter press and belt press are chosen carefully and quality so that they less service and easy care. Sludge dewatering cannot used only treatment of domestic waste water they should be us effort industrial process some of these industrial process are below: Manufacture of chemical products, metal processing and enrichment, sugar beet processing, paint production, plastic production, ceramic industry, phosphate coating baths