Ozone was being used to treat drinking water, groundwater, process water for the pharmaceutical industry and swimming pool water. Some of the plants ... Diagrams of the packed columns are included, and the theory of aeration for contaminant removal from water is reviewed. Under optimal ... U.S.A. 86-25I7 Preparation of milk of lime at the VEB Gaskombinat Schwarze Pumpe factory. E. GLOCK (VEBanbsp;...