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Title: | AOX removal from industrial wastewaters using advanced oxidation processes: assessment of a combined chemical-biological oxidation | Authors: | Luyten, J. SNIEGOWSKI, Kristel Van Eyck, K. Maertens, D. TIMMERMANS, Silke Liers, Sven BRAEKEN, Leen |
Issue Date: | 2013 | Source: | WATER SCIENCE AND TECHNOLOGY, 68 (9), p. 2048-2054 | Abstract: | In this paper, the abatement of adsorbable halogenated organic compounds (AOX) from an industrial wastewater containing relatively high chloride concentrations by a combined chemical and biological oxidation is assessed. For chemical oxidation, the O-3/UV, H2O2/UV and photo-Fenton processes are evaluated on pilot scale. Biological oxidation is simulated in a 4 h respirometry experiment with periodic aeration. The results show that a selective degradation of AOX with respect to the matrix compounds (expressed as chemical oxygen demand) could be achieved. For O-3/UV, lowering the ratio of O-3 dosage to UV intensity leads to a better selectivity for AOX. During O-3-based experiments, the AOX removal is generally less than during the H2O2-based experiments. However, after biological oxidation, the AOX levels are comparable. For H2O2/UV, optimal operating parameters for UV and H2O2 dosage are next determined in a second run with another wastewater sample. | Notes: | Braeken, L (reprint author), Katholieke Hogesch Limburg, Lab4U, Agoralaan Gebouw B, B-3590 Diepenbeek, Belgium. leen.braeken@kuleuven.be | Keywords: | AOX removal; chemical-biological oxidation; industrial wastewater | Document URI: | http://hdl.handle.net/1942/16156 | ISSN: | 0273-1223 | e-ISSN: | 1996-9732 | DOI: | 10.2166/wst.2013.459 | ISI #: | 000328070200020 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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luyten 1.pdf | Published version | 774.2 kB | Adobe PDF | View/Open |
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