Patent ID: 7238283
Filing Date: 2007-07-03
Classification: C02F,Y10S

Abstract:
1. A system for batch treating semiconductor manufacturing process wastewater, comprising: a first collection tank in fluid communication with a wafer backgrind apparatus for receiving a first wastewater comprising first particles; a second collection tank in fluid communication with a planarization apparatus for receiving a second wastewater comprising second particles; a batch reaction tank provided in fluid communication with said first collection tank and said second collection tank, said batch reaction tank for receiving and sedimenting particles from a batch of wastewater comprising the first wastewater and the second wastewater wherein said reaction tank is configured to add a polymer coagulant to said batch to form a precipitate comprising said first and second particles for sedimentation; and at least one clarifier provided in fluid communication with said batch reaction tank for separating said precipitate from said batch of wastewater.