Wash presses reduce the mass and volume of screenings and consequently the disposal costs
The best method of screenings treatment is washing and compaction with a wash press. Fecal matter and other organic materials are removed and returned into the wastewater flow. As a result, a good wash press increases the BOD5 load to the biological treatment process by about 6 %.
After washing, the screenings are compacted to reduce the water content and increase the solids concentration. Dewatering is improved by the removal of organic materials during washing. A good wash press can achieve a weight and volume reduction of up to 80 % and thus consequently reducing the disposal costs.
