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Open AccessFeature PaperArticle

A Single Tube Contactor for Testing Membrane Ozonation

1
Centre for Doctoral Training, Centre for Sustainable Chemical Technologies, University of Bath, Bath BA2 7AY, UK
2
Department of Chemical Engineering, University of Bath, Bath BA2 7AY, UK
3
Water Innovation and Research Centre (WIRC), University of Bath, Bath BA2 7AY, UK
*
Author to whom correspondence should be addressed.
Water 2018, 10(10), 1416; https://doi.org/10.3390/w10101416
Received: 13 September 2018 / Revised: 4 October 2018 / Accepted: 8 October 2018 / Published: 10 October 2018
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Abstract

A membrane ozonation contactor was built to investigate ozonation using tubular membranes and inform computational fluid dynamics (CFD) studies. Non-porous tubular polydimethylsiloxane (PDMS) membranes of 1.0–3.2 mm inner diameter were tested at ozone gas concentrations of 110–200 g/m3 and liquid side velocities of 0.002–0.226 m/s. The dissolved ozone concentration could be adjusted to up to 14 mg O3/L and increased with decreasing membrane diameter and liquid side velocity. Experimental mass transfer coefficients and molar fluxes of ozone were 2.4 × 10−6 m/s and 1.1 × 10−5 mol/(m2 s), respectively, for the smallest membrane. CFD modelling could predict the final ozone concentrations but slightly overestimated mass transfer coefficients and molar fluxes of ozone. Model contaminant degradation experiments and UV light absorption measurements of ozonated water samples in both ozone (O3) and peroxone (H2O2/O3) reaction systems in pure water, river water, wastewater effluent, and solutions containing humic acid show that the contactor system can be used to generate information on the reactivity of ozone with different water matrices. Combining simple membrane contactors with CFD allows for prediction of ozonation performance under a variety of conditions, leading to improved bubble-less ozone systems for water treatment. View Full-Text
Keywords: ozonation; membranes; polydimethylsiloxane; mass transfer; wastewater treatment; water treatment; peroxone ozonation; membranes; polydimethylsiloxane; mass transfer; wastewater treatment; water treatment; peroxone
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Zoumpouli, G.A.; Baker, R.; Taylor, C.M.; Chippendale, M.J.; Smithers, C.; Ho, S.S.X.; Mattia, D.; Chew, Y.M.J.; Wenk, J. A Single Tube Contactor for Testing Membrane Ozonation. Water 2018, 10, 1416.

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