Rejection of Wastewater-Derived Micropollutants in High-Pressure Membrane Applications Leading to Indirect Potable Reuse
Dr. Jörg E. Drewes, Colorado School of Mines
Membrane processes such as reverse osmosis (RO), ultralow pressure reverse osmosis (ULPRO), and nanofiltration (NF) are becoming increasingly widespread in water treatment and wastewater reclamation and reuse applications where a high-quality product is desired. Membrane processes are often chosen because these applications achieve high levels of removal of constituents such as dissolved solids, organic carbon, inorganic ions, and regulated and unregulated organic compounds.
Knowledge on the rejection of trace organics during RO and NF treatment has been gained largely from observations at pilot- and full-scale installations. Based on the key findings from a comprehensive literature review, the central project objective of this study was to examine the rejection mechanisms of organic trace pollutants in NF and RO membrane applications. Specific goals of the project were (1) to determine physicochemical properties which are suitable to describe membrane–solute interactions and rejection behavior; (2) to explore the relationships among physicochemical properties of trace organics and rejection mechanisms; and (3) to develop a fundamental transport model to describe and predict the rejection of trace organics in high-pressure membrane applications, based on hindered or facilitated diffusion. (2006, 152 pages, 02-001-01)
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