Most Recent RO Module of Cellulose Triacetate

Shnldown due to Hi -nessure Pump Leakage of Test UniL (Apr.8-23) 

For a 12-month test period, RO performance of HB9155 based on CTA material was very stable and satisfied the test requirements. Therefore, it was demonstrated that RO plant performance could be recovered by replacement of existing polyamide membranes with CTA membranes. Differential pressure was stable at a low level of about 20 kPa without the need for chemical cleaning during the test period. Therefore, it is concluded that the ICI method worked effectively to prevent biological fouling. 

Membrane manufacturers are working to develop membranes offering higher water recovery, lower energy, and lower installation cost in order to enable the RO process to be recognized as the most popular method for supplying freshwater around the world. 

In areas such as the Middle East where seawater has high salinity, commercial seawater RO desalination plants were normally designed to operate at approximately 35% recovery. This relatively low recovery was due to the very high osmotic pressure of the seawater, and most commercially available RO membranes did not allow operating pressures above 

If the recovery is increase to about 50%, the osmotic pressure of the brine increases to about 6.1 MPa. Therefore, a higher feed pressure (i.e., driving force) is required for a high-recovery operation in comparison with a conventional low-recovery operation. In order to enable the high-recovery operation, the RO module must be designed and manufactured 

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