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In these days, wastewater reclamation and seawater desalination play essential role in addressing the challenge of worldwide water scarcity. Particularly, reverse osmosis (RO) for seawater desalination process is commonly used due to less energy consumption than conventional thermodynamic systems. However, membrane fouling and electrical energy consumption during operation of RO system for seawater desalination haver continued to be a obstruction to its application. In this study, therefore, wastewater secondary effluent is used for osmotic dilution of seawater. Firstly, fouling behaviour of RO by simulating wastewater effluent in osmotic dilution process was measured and we calculated energy consumption of overall desalination process by theoretical equations and commercial program. Our results reveal that RO membrane fouling can be efficiently controlled by pre-treatment systems such as nano filtration (NF) or forward osmosis (FO) process. Especially FO system for osmotic dilution process is a non-pressurized membrane system and, therefore, the operating energy consumption of overall desalination system was the lowest. Moreover, fouling layer on FO membrane is comparatively weak and reversible enough to be disrupted by physical cleaning. Thus, RO system with low salinity feed water through FO process is possible as a less energy consuming desalination system with efficient membrane fouling control.
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참고문헌 (15)
참고문헌 신청
Bartman, A. R. / 2010 / Minimizing Energy Consumption in Reverse Osmosis Membrane Desalination Using Optimization-Based Control / Journal of Process Control 20:1261~1269
Bella, G. D. / 2013 / Performance of a MBR Pilot Plant Treating High Strength Wastewater Subject to Salinity Increase : Analysis of Biomass Activity and Fouling Behaviour / Bioresource Technology 147:614~618
Boo, C. / 2013 / Fouling Control in a Forward Osmosis Process Integrating Seawater Desalination and Wastewater Reclamation / Journal of Membrane Science 444:148~156
Cath, T. Y. / 2006 / Forward Osmosis : Principles, Applications, and Recent Developments / Journal of Membrane Science 281:70~87
Elimelech, M. / 2011 / The Future of Seawater Desalination : Energy, Technology, and the Environment / Science 333:712~717
Bella, G. D. / 2013 / Performance of a MBR Pilot Plant Treating High Strength Wastewater Subject to Salinity Increase : Analysis of Biomass Activity and Fouling Behaviour / Bioresource Technology 147:614~618
Boo, C. / 2013 / Fouling Control in a Forward Osmosis Process Integrating Seawater Desalination and Wastewater Reclamation / Journal of Membrane Science 444:148~156
Cath, T. Y. / 2006 / Forward Osmosis : Principles, Applications, and Recent Developments / Journal of Membrane Science 281:70~87
Elimelech, M. / 2011 / The Future of Seawater Desalination : Energy, Technology, and the Environment / Science 333:712~717
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