screw press is used for sludge dewatering, using stainless steel as the Filtration method. Sludge is thickened and dewatered progressively inside the screw body with the movement of the moving rings, and ending by the fixed plate. The filtrate is drained from the gaps between fixed and moving rings and dewatered cake is discharged at the end plate, achieving a minimum solid content of 20%. Low speed rotation and special filtration design of the screw press make the machine a low consumption Energy with high yield automation unit, suitable for most projects and saving maintenance cost. The screw press also accepts a wide range of chemical and biological sludge industries including Municipal, Food & beverage, Papermaking, Dyeing, Printing and etc.