Part 2: Analysis Of Membranes Used To Treat Steel Plant Effluent
By Anna Jawor, PhD, Eric M.V. Hoek, PhD, Arian Edalat, PhD, and Y.O. Kim, PhD
As described in Part I, Hyundai Engineering & Construction (Hyundai Engineering) has commissioned Water Planet Engineering (engineering consultant) to provide engineering support services associated with pilot testing of a reverse osmosis (RO)-based water reuse system designed to treat inorganic wastewater. Among other steps, autopsy of RO and ultrafiltration (UF) membranes was performed and the results are presented below. Key Takeaways All observations indicate that the current pretreatment process is inefficient, and is unable to prevent damage and loss of performance of the UF and RO membranes. RO membrane autopsy. Fluoride salts of calcium, aluminum, and iron, phosphate salts of calcium and aluminum, as well as organic and bacterial foulants were found on the RO membrane surface. Structural damages to the membrane because of excessive pressure drop and chlorine exposure were also observed.
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