Abstract

Reclaimed water offers prospects as analternative water resource. Many technologies have beendeveloped to treat reclaimed wastewater technologies. Themembrane technology is considered one of the most effectivewater treatment technologies for water reclamation.Ultrafiltration membranes are particularly effective at removingmicroorganisms in wastewater, particularly protozoa.Coagulation-flocculation is a feasible process to reclaim waterand widely used as a pre-treatment. The aim of this study is toinvestigate the performance of water reclamations processes:the single coagulation-flocculation, the single ultrafiltration andthe combined coagulation-flocculation and ultrafiltration. Thepilot scale laboratories of each process was operated and havebeen characterized in order to evaluate the performance. Theresults of combined CF+UF process had the highestperformance of COD, turbidity and color removal efficienciesthan the single CF process and the single UF process. Thecombination of CF+UF helps to improve the processperformance and enhanced COD, turbidity and color removalefficiencies of combined processes. The reclaimed water fromcombined CF+UF process can be used for vehicle washing,urban landscaping and toilet flushing purposes. In addition, canbe used as water supply. However, to use instead of water supplyshould be evaluated the bacteria indicators, hygienic safety andeconomic feasibility.