International Journal of Environmental Science and Development

Abstract—Reclaimed water offers prospects as an alternative water resource. Many technologies have been developed to treat reclaimed wastewater technologies. The membrane technology is considered one of the most effective water treatment technologies for water reclamation. Ultrafiltration membranes are particularly effective at removing microorganisms in wastewater, particularly protozoa. Coagulation-flocculation is a feasible process to reclaim water and widely used as a pre-treatment. The aim of this study is to investigate the performance of water reclamations processes: the single coagulation-flocculation, the single ultrafiltration and the combined coagulation-flocculation and ultrafiltration. The pilot scale laboratories of each process was operated and have been characterized in order to evaluate the performance. The results of combined CF+UF process had the highest performance of COD, turbidity and color removal efficiencies than the single CF process and the single UF process. The combination of CF+UF helps to improve the process performance and enhanced COD, turbidity and color removal efficiencies of combined processes. The reclaimed water from combined CF+UF process can be used for vehicle washing, urban landscaping and toilet flushing purposes. In addition, can be used as water supply. However, to use instead of water supply should be evaluated the bacteria indicators, hygienic safety and economic feasibility.

Index Terms—Reclaimed water, ultrafiltration, coagulation-flocculation.

The authors are with Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand (e-mail: chareeya@sut.ac.th, w_watcharapol@hotmail.com, oraneerr@gmail.com, boonchai@sut.ac.th, chow@sut.ac.th).

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Cite: J. Yimratanabovorn, W. Wonglertarak, O. Rungrueang, C. Hirunteeyakul, and B. Wichitsathein, "Performance Comparison of Coagulation, Ultrafiltration and Combined Coagulation and Ultrafiltration for Water Reclamation," International Journal of Environmental Science and Development vol. 9, no. 8, pp. 200-203, 2018.