Abstract
A new crosslinked fully aromatic polyamide ultra low pressure composite reverse osmosis (RO) membrane (UTC-70UL) which can be used at around 0.75MPa, has been developed. UTC-70UL has approximately two times higher water flux than low pressure RO membrane (UTC-70) keeping the high solute rejection of UTC-70. SUL-G series element is spiral-wound element for brackish water desalination using UTC-70UL membrane, which has high productivity and high solute rejection same as the conventional element (SU-700 series spiral-wound element using UTC-70 membrane) at ultra low pressure 0.75MPa. SUL-GP series element is spiral-wound element especially designed for ultrapure water production, which has high productivity and high solute rejection and start-up characteristic better than that of conventional element (SU-700P series spiral-wound element) at ultra low pressure 0.75MPa.
