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Title: Filtration of natural organic matter using ultrafiltration membranes for drinking water purposes: circular cross-flow compared with stirred dead end flow
Authors: Shamsuddin, Norazanita
Das, Diganta Bhusan
Starov, Victor
Keywords: Membrane filtration
Circular cross flow
Stirred dead end flow
Mass transfer coefficient
Humic acid
Issue Date: 2015
Publisher: © Elsevier
Citation: SHAMSUDDIN, N., DAS, D.B. and STAROV, V., 2015. Filtration of natural organic matter using ultrafiltration membranes for drinking water purposes: circular cross-flow compared with stirred dead end flow. Chemical Engineering Journal, 276, pp. 331-339.
Abstract: Application of ultrafiltration membranes for removal of humic acids is investigated below. Membrane filtration processes were compared using two different set-ups: circular flow and stirred dead end flow. The transmembrane pressure, temperature, feed concentration, pH, ionic strength and shear stresses applied on the membrane surfaces were kept constant whilst the permeate flux and solute rejection were measured during the experiments with both set-ups. It was shown that the rejection (both the observed and the true rejection) in the case of circular flow was higher than in the case of dead end flow. The mass transfer coefficients were determined for both set-ups. In the case of stirred dead end, it ranged in from 2.14 to 4.72 × 10−6 m/s; however, for circular cross flow system, the mass transfer coefficients were found in the range 2.24–3.22 × 10−5 m/s. Comparison of the mass transfer coefficients obtained for both systems showed that it was significantly higher for circular flow systems as compared with stirred dead end system at similar operating conditions. Energy consumed per volume of purified water by circular flow system (0.345 kW) was found to be much lower when by stirred dead end system (0.955 kW). This proved that the performance of circular flow system was more efficient in terms of rejection, mass transfer coefficient and energy consumption.
Description: This article was published in the Chemical Engineering Journal [© Elsevier] and the definitive version is available at: http://dx.doi.org/10.1016/j.cej.2015.04.075
Sponsor: The authors gratefully acknowledge a PhD studentship awarded to Norazanita Shamsuddin by Brunei Government which made this work possible.
Version: Accepted for publication
DOI: 10.1016/j.cej.2015.04.075
URI: https://dspace.lboro.ac.uk/2134/17533
Publisher Link: http://dx.doi.org/10.1016/j.cej.2015.04.075
ISSN: 0300-9467
Appears in Collections:Published Articles (Chemical Engineering)

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