A rotating membrane contactor: experimental studies

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Abstract:

In this study, unconfined hollow-fiber membrane modules are designed to be attached to a rotating arm that pulls the fibers through water. This use of unconfined membranes is well suited to environmental applications where waters often contain high solids concentrations that can rapidly clog or foul tightly packed conventional tubular membrane module designs. Pressurized oxygen was supplied to the fibers, and the mass-transfer rates and energy requirements of a rotating membrane contactor were measured over a practical range of design and operating conditions. Mass-transfer performance of the unconfined membranes was correlated with the Reynolds number to the 0.52 power. Over the range of values tested, performance was independent of the length, number, and spacing of hollow-fiber membranes; the vertical arm diameter; and the radial position of the vertical arm from the center shaft. The clean water mass-transfer efficiency (kg O2/kW · h) of the contactor was found to be superior to commercially available pure-oxygen dissolution systems and other membrane contactor designs.

Keywords: FOULING; HOLLOW FIBER MEMBRANES; MASS TRANSFER; WATER TREATMENT

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143098X123624

Publication date: November 1, 1998

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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