| A full-size ZeeWeedRTM 500D membrane system was operated as a tertiary treatment at GoldBar Wastewater Treatment Plant. During the ten months of operation, the impact of different feed waters and membrane operating conditions on permeate water quality and membrane performance has been investigated.; The permeate contained less than 0.6 mg/L total suspended solids, 0.2 NTU, 2 mg/L 5-day biochemical oxygen demand (BOD5), low coliform and coliphage content regardless of the feed water and membrane operation. Silt density index (SDI) was used to prove that the permeate water quality has certain relationship with the membrane operating condition.; For membrane operating conditions, the impact of aeration and water recovery was negligible; backpulse duration was selected as 30 seconds; the optimized operating parameter range was between 16.5 and 33.4 Lm-2h -1 for flux and from 10 to 25 minutes for operating time.; NaOCl and citric acid maintenance chemical cleaning was investigated. NaOCl recovery cleaning reached highest cleaning effectiveness. |
