抄録
We have newly developed the tubular reverse osmosis (RO) membrane / nanofiltration (NF) membrane module for wastewater treatment. The membrane has the less fouling properties due to the membrane material of hydrophilic cellulose acetate and has the higher mechanical strength properties due to the support layer. The salt rejections of the RO/NF membrane are designed from 70 to 90% for highly turbid and oily wastewater treatment. The membrane modules are applied for various oily wastewater treatments and achieve extremely high reduction of wastewater volume of 1/40 to 1/20 due to high concentration of wastewater. We expect to utilize the tubular RO/NF technology to zero liquid discharge (ZLD) system in near future.
