seatec - Finnish marine technology review 1/2014 | Page 43

WatMan SWRO It means less energy, less maintenance, less down-time, less costs and more cuastomer satisfaction S eawater Reverse Osmosis (SWRO) rejects typically 98.5– 55–70 bars. So called 2-pass SWRO can remove even up to 99.9 % 99.5 % of the salinity in one pass. In large-scale produc- of the total salinity, meaning less than 20 mg/l of chloride, with- tion, energy consumption creates a noticeable expense. In con- out significantly increasing the energy consumption. These high ventional SWRO systems, typical energy consumption varies from rejections are often required to achieve high potable water quality. 6 to 10 kWh/m -fresh water, depsending on salinity, tempera- WatMan SWRO Systems can help you to produce extreme- ture and recovery rate among others. In state-of-the-art systems ly low-salinity fresh water with very low energy consumption. with energy recovery the energy consumption can be as low as This means less energy, less maintenance, less down-time, less 2...4 kWh/m3-fresh water. costs and more customer satisfaction. Less is sometimes more. 3 On the other hand, 1-pass SWRO can produce fresh water with about 100 mg/l of chloride at its best. These high rejection systems always need an average feed pressure of More information: www.watman.fi seatec 1/2014 41