Preprint Article Version 1 This version is not peer-reviewed

A Single Tube Contactor for Testing Membrane Ozonation

Version 1 : Received: 13 September 2018 / Approved: 13 September 2018 / Online: 13 September 2018 (15:16:43 CEST)

A peer-reviewed article of this Preprint also exists.

Zoumpouli, G.A.; Baker, R.; Taylor, C.M.; Chippendale, M.J.; Smithers, C.; Xian, S.H.S.; Mattia, D.; Chew, Y.M.J.; Wenk, J. A Single Tube Contactor for Testing Membrane Ozonation. Water 2018, 10, 1416. Zoumpouli, G.A.; Baker, R.; Taylor, C.M.; Chippendale, M.J.; Smithers, C.; Xian, S.H.S.; Mattia, D.; Chew, Y.M.J.; Wenk, J. A Single Tube Contactor for Testing Membrane Ozonation. Water 2018, 10, 1416.

Journal reference: Water 2018, 10, 1416
DOI: 10.3390/w10101416

Abstract

A membrane ozonation contactor was built to investigate ozonation using tubular membranes and to 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 m−3 and liquid side velocities of 0.002 m s−1 – 0.226 m s−1. The dissolved ozone concentration could be adjusted to up to 14 mg O3 L−1 and increased with decreasing membrane diameter and liquid side velocity. Experimental mass transfer coefficients and molar fluxes of ozone were 1.1∙10−5 mol m−2 s−1 and 2.4∙10−6 m s−1, 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 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 predicting ozonation performance under a variety of conditions leading to improved bubble-less ozone systems for water treatment.

Subject Areas

ozonation; membranes; polydimethylsiloxane; mass transfer; wastewater treatment; peroxone

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