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Title: Eightfold increased membrane flux of NF 270 by O3 oxidation of natural humic acids without deteriorated permeate quality
Other Titles: Treatment of concentrated solutions of natural humic acids by O3 (+ H2O2)
Authors: Van Geluwe, Steven ×
Vinckier, Christiaan
Bobu, E
Trandafir, C
Vanelslander, J
Braeken, Leen
Van der Bruggen, Bart #
Issue Date: Nov-2010
Publisher: Published for the Society of Chemical Industry by Blackwell Scientific Publications
Series Title: Journal of Chemical Technology and Biotechnology vol:85 issue:11 pages:1480-1488
Abstract: BACKGROUND:
Membrane fouling by humic acids limits the water recovery of nanofiltration in drinking water production. This article investigates if membrane fouling can be reduced by decomposition of humic acids in the concentrate stream by O3 oxidation.
RESULTS:
At a specific O3 dose of 2.11 g O3 per g COD (17.0 g m-3 O3 (g) for 20 minutes), a COD reduction of 38% and a hydrophobic COD reduction of 69% is achieved. The membrane permeability of the ozonated solution by NF 270 membranes is higher (20.6 . 10-9 L s-1 m-2 Pa-1) than the permeability if the untreated solution is filtered (2.4 . 10-9 L s-1 m-2 Pa-1). The COD retention of the ozonated solution was similar to the retention of the untreated samples. The addition of H2O2 allows to obtain a better mineralization degree, i.e., UVA removal increased from 53% to 66% if H2O2 was added as from 10 minutes oxidation at the same molar flow rate as O3.
CONCLUSION:
O3 oxidation can substantially alleviate membrane fouling by humic acids in nanofiltration systems and the addition of H2O2 can slightly improve its decomposition.
ISSN: 0268-2575
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Process Engineering for Sustainable Systems Section
Molecular Design and Synthesis
Sustainable Chemical Process Technology TC, Technology Campus Diepenbeek
Sustainable Chemical Process Technology TC
× corresponding author
# (joint) last author

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