Abstract
On advanced drinking water treatment, including unit processes of ozonation, ozone resistant membrane filtration and granular activated carbon (GAC) tower treatment, pollutant removal performances of unit processes and relationships between some operational conditions and membrane filtration flux were examined. From the experimental results, it became obvious that it was necessary to maintain residual ozone concentration of 0.2 to 1.0mg/L in the filtrate from the membrane module in order to maintain higher membrane filtration flux. With ozone dosage of 3mg/L by an ejector and with operation mode of dead-end filtration, membrane filtration flux of more than 5m^3/M^2/day could be maintained. Quality of the effluent from GAC tower constantly satisfied Japanese standard for drinking water.
