A reverse osmosis (RO) system for water desalination capable of producing 20000m3/day has been installed in a refinery within the Mediterranean The packaged reverse osmosis (RO) system is capable of producing 20,000m3/day of fresh water from seawater, with 300mg/L total dissolved solids (TDS) content. The construction is suitable for the production of both drinking water (CE and WHO standards compliant) and high quality irrigation water. In the model OCEAN 20 the feedwater is prefiltered to avoid loose and fine solids from reaching the feed stream to the RO elements. The system is designed to offer 30-year lifetime in continuous 24/7 operations. The membranes are RO modules capable of producing freshwater in just one pass, from a typically Mediterranean 38,000mg/L TDS feedstream. The system offers features such as energy recovery turbines, soft start for the electric motors, low fouling membranes, SS316 frames, and interconnecting piping. The system comes complete with a holdup tank. The tank also acts as a flushing holdup as well as a Cleaning In Place (CIP) recirculation tank to chemically clean the membranes, if necessary. The logic is fully PLC/SCADA controlled. Both running and cleaning operations are PLC-supervised and require minimum operator’s attention. The skid-mounted racks are predesigned, pretested units approximately 8m long, 5m wide and 2m high. The skids are fully preassembled, pretested plants ready to operate at the time of installation (provided electricity and seawater is fed, separately). All instruments and local control panel feature soft-start for the high pressure pumps’ electric engines. The system is fit for the outdoors and is designed to stand tropical/equatorial climates from Golf Courses in the Mediterranean to oil fields either onboard offshore drilling rigs or vessels such as FPSO, FPO, and FSO units.
Water desalination
