In order to achieve an efficient and economical advanced drinking water system, the relationship between operating conditions, membrane filtration flux and water qualities was examined by using a pilot plant consisting of ozonation facility, ozone resistant microfiltration (MF) module and granular activated carbon (GAC) tower. It was found that keeping residual ozone of more than 0.3 mg/L on the membrane surface is necessary in order to obtain a high membrane filtration flux. Withy ozone dosage of 3 mg/L by ejector and filtration by dead-end mode, this new system provided a high membrane filtration flux of more than 5 m3/m2/day. Quality of the produced water from the GAC tower was meeting the drinking water standard.

On advanced drinking water treatment ， including unit processes of ozonation ， ozone resistant me 皿 brane 丘ltration and granular activated carbon ( GAC ) tower treatment ， pollutant removal perfbr 皿 ances of unit processes and relationships between some operational conditions and membrane filtration flux were exa1 皿 ined ， Frem the experimental results ， it became obvious that it was necessary to 皿 aintain residual ozone concentration of O 、 2 to 1． O mg 〆 L in the 丘ltrate from the membrane module ill order to mailltain higher membrane filtration flux， With ozone dQsage of 3 nlg 〆 L by an eject ' )r and with operation mode of dead ・ end filtration ， membrane filtration flux of more than 5 m31m21day