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Biotreatment of actual textile wastewater in a continuous biofilter and the associated bacterial and fungal microflora.
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Miljöbioteknik)ORCID iD: 0000-0001-8179-1446
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences. (Centre for Ecology and Evolution in Microbial model Systems)
Linnaeus University, Faculty of Science and Engineering, School of Engineering. Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences. (Centre for Ecology and Evolution in Microbial model Systems)ORCID iD: 0000-0002-6405-1347
Linnaeus University, Faculty of Science and Engineering, School of Engineering. (Miljöbioteknik)ORCID iD: 0000-0003-0841-7065
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Textile processes use many different chemicals, most of which ends up in wastewater. Coloring of clothes is a particularly troublesome process since both azo and anthraquinone dyes are recalcitrant to degradation, causing environmental concerns. Hence, there is a great need to investigate and develop safe and applicable systems to the water demanding industry, such as textile mills in developing countries.

In the present study biodegradation of actual textile wastewater (containing azo and anthraquinone dyes) was evaluated in biofilters. Indigenous decolourants from rice husks were used in bioreactors and the degradation was analyzed with spectrophotometer and liquid chromatography coupled with mass spectrometry (LC/MS/MS) to monitor metabolites, especially in the form of aromatic amines. Chemical characteristics of the water were and bacterial and fungal community composition was monitored by denaturing gradient gel glectrophoresis (DGGE) analysis and subsequent sequencing of the 16S rRNA and ITS gene fragments.

The indigenous microflora consistently performed over 90% decolorization at a hydraulic retention time of 67 h. The molecular fingerprinting revealed the presence of bacteria such as Clostridium, Pseudomonadales, Xenophilus, Paenibacillus, Acinetobacter and Sphingomonas, all known to carry genes for azoreductases.  Furthermore, results showed that fungi were present in the biofilter, and were predominant in the aerobic reactors.

Collectively, these results indicate that the developed biofilter with rice husks support a mixed microbial community of both bacteria and fungi, with key features contributing to an efficient and reliable degradation performance of actual textile wastewater.

National Category
Engineering and Technology Environmental Engineering Water Treatment
Research subject
Environmental Science, Environmental technology
Identifiers
URN: urn:nbn:se:lnu:diva-23506OAI: oai:DiVA.org:lnu-23506DiVA: diva2:589244
Available from: 2013-01-17 Created: 2013-01-17 Last updated: 2017-01-13Bibliographically approved
In thesis
1. Microbial treatment of textile wastewater applicable in developing countries
Open this publication in new window or tab >>Microbial treatment of textile wastewater applicable in developing countries
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Växjö, Kalmar: Linnaeus University Press, 2013
Series
Linnaeus University Disserations, 114/2013
Keyword
Biotreatment, Biodegradation, Biofilter, Textile wastewater, Azo dyes, Industrial wastewaters, indigenous decolorizers, LC-MS, Anaerobic and aerobic water treatment
National Category
Environmental Biotechnology
Research subject
Environmental Science, Environmental technology
Identifiers
urn:nbn:se:lnu:diva-23507 (URN)978-91-87427-02-2 (ISBN)
Public defence
2013-02-08, M1083, Hus M, Växjö, 12:44 (English)
Opponent
Supervisors
Available from: 2013-01-18 Created: 2013-01-17 Last updated: 2016-04-11Bibliographically approved

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Forss, JörgenPinhassi, JaroneWelander, Ulrika

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