Process Wastewater Technologies LLC revolutionized the storm water and CSO treatment industry in the early 1990s by introducing continuous deflective separation technology to the market. The cds product is now offered by PWTech as SanSep, for treating wet weather excess flows before discharge, and for polishing final effluent from wastewater treatment plants. PWTech also offers Volute screw press technology for residuals thickening and dewatering application. The Volute technology is licensed for the US Market from Amcon, Inc (Japan).