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Combined anaerobic-ozonation process for treatment of textile wastewater: Removal of acute toxicity and mutagenicity
Department of Biotechnology, Lund University, Lund, Sweden .
Water and Environmental Engineering at the Department of Chemical Engineering, Lund University, Lund, Sweden .
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Department of Biotechnology, Lund University, Lund, Sweden.ORCID iD: 0000-0002-0137-2194
School of Education and Environment, Kristianstad University, Kristianstad, Sweden .
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2015 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 292, 52-60 p.Article in journal (Refereed) Published
Abstract [en]

A novel set up composed of an anaerobic biofilm reactor followed by ozonation was used for treatment of artificial and real textile effluents containing azo dyes. The biological treatment efficiently removed chemical oxygen demand and color. Ozonation further reduced the organic content of the effluents and was very important for the degradation of aromatic compounds, as shown by the reduction of UV absorbance. The acute toxicity toward Vibrio fischeri and the shrimp Artemia salina increased after the biological treatment. No toxicity was detected after ozonation with the exception of the synthetic effluent containing the highest concentration, 1. g/l, of the azo dye Remazol Red. Both untreated and biologically treated textile effluents were found to have mutagenic effects. The mutagenicity increased even further after 1. min of ozonation. No mutagenicity was however detected in the effluents subjected to longer exposure to ozone. The results of this study suggest that the use of ozonation as short post-treatment after a biological process can be beneficial for the degradation of recalcitrant compounds and the removal of toxicity of textile wastewater. However, monitoring of toxicity and especially mutagenicity is crucial and should always be used to assess the success of a treatment strategy. © 2015 Elsevier B.V.

Place, publisher, year, edition, pages
2015. Vol. 292, 52-60 p.
Keyword [en]
Azo dye, Biological treatment, Mutagenicity, Ozone, Textile wastewater, Azo dyes, Biochemical engineering, Chemical oxygen demand, Effluents, Ozone water treatment, Ozonization, Textiles, Toxicity, Wastewater treatment, Anaerobic biofilms, Biological process, Ozonation process, Recalcitrant compounds, Synthetic effluent, Biological water treatment, Artemia salina, Decapoda (Crustacea), Vibrio fischeri
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-27743DOI: 10.1016/j.jhazmat.2015.03.018Scopus ID: 2-s2.0-84924794872OAI: oai:DiVA.org:mdh-27743DiVA: diva2:798461
Available from: 2015-03-26 Created: 2015-03-26 Last updated: 2016-07-05Bibliographically approved

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