TREATMENT OF SOFT RESERVOIR WATER BY LIMESTONE FILTRATION IN COMBINATION WITH ULTRAFILTRATION

Treating surface waters from reservoirs usually means the removal of m anganese and particles as well as the adjustment of pH to reach calciu m carbonate equilibrium. A new combination of limestone filtration and ultrafiltration (UF) was investigated in pilot experiments. Results o n particle and manganese removal efficiency and specific permeate flux dependence on backwash procedure are discussed and aspects for furthe r research are shown. The full-scale concept of a new water work based on the pilot experiments is presented. Costs are discussed for the co mparison of membrane technology to conventional direct filtration.