Membrane Systems spiral-wound TFC® 2832SS-540 Magnum® seawater elements and study and interpretation of the normalized data using the NormPro® software

The need for good-quality water in Cyprus continues to be the driving force for the use of reverse osmosis to desalinate brackish water and seawater for irrigation and potable use. Much work continues both to optimize the process designs for new plants and to refine the operation of existing ones. The pilot plant has been operated successfully for over 2 years. It uses four TFC® 2832SS-540 Magnum® elements in one tube operating at 50% recovery. It has been monitored using the NormPro® normalization software to assess the performance of the elements during this time. The normalized data are reviewed and an interpretation of the results given. The effect of the pretreatment on fouling is assessed and the results of the cleaning reviewed. The study shows the importance of monitoring in order to ensure satisfactory long-term stable system performance.

The pilot plant has operated successfully for over 2 years and demonstrates that the spiralwound element, TFC® 2832SS-540 Magnum®, can operate reliably under these site conditions. The permeate flow, salt passage and pressure drop are stable. The performance follows the projected results and gives a high level of confidence in the prediction values used for design purposes. The quality of the seawater and pretreatment is good and minimizes fouling, requiring cleaning only everly 9 to 12 months. Boron rejection is much higher than anticipated.