GAST Clearwater Technology at work: Feedstock water was sewage effluent, no chemicals used except for pH adjustment from time to time. 12M liter... Published on December 30, 2021 07:01 by Kevin Gast, kgast@gastglobal.comGAST Clearwater Technology at work: Feedstock water was sewage effluent, no chemicals used except for pH adjustment from time to time. 12M liter / day capacity. Media