The Quatech Screw Press is an economical and eco-friendly sludge dewatering machine. It is a new type of equipment that uses screw extrusion principles to achieve solid-liquid separation. The process involves strong squeezing forces generated by variations in the screw diameter and pitch, along with the small gap between the floating and fixed rings.

Typical applications for wastewater treatment plants include dewatering thickened or un-thickened waste activated sludge (WAS), digested sludge from aerobic or anaerobic processes, and dissolved air flotation (DAF) sludges. The Quatech Screw Press is also effective for dewatering liquid sludges from various industries, including municipal applications. For municipal or bio sludge applications, the press typically produces a dewatered sludge cake with 20% dry solids content. It is a simple, slow-moving device that achieves dewatering through continuous gravitational drainage.