Evaluation of new compact pretreatment system for high turbidity seawater: Fiber filter and ultrafiltration

► New SWRO pretreatment unit to treat high turbidity seawater was evaluated. ► The pretreatment unit consists of double stage fiber filter and ultrafiltration. ► Effluent of the fiber filter never exceeded 3 NTU even at feed turbidity of 50 NTU. ► The final effluent SDI15 of the pretreatment unit was always less than 3.0. ► RO unit operated with the pretreatment unit showed stable performance.