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Evaluation of two different carriers in the biodegradation process of an azo dye
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.ORCID iD: 0000-0002-3120-3113
UNESP - São Paulo State University, Brazil.
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.ORCID iD: 0000-0001-8179-1446
2019 (English)In: Journal of Environmental Health Science and Engineering, E-ISSN 2052-336X, Vol. 17, no 2, p. 633-643Article in journal (Refereed) Published
Abstract [en]

Purpose The MBBR solution has been applied for the textile wastewater treatment. However, in order to develop cost-effectivesolutions, waste biomass can be used as carrier. Rice husks are agricultural waste which have been used as an adsorbent of dyes;besides, they can provide and sustain suitable microorganism communities for the degradation of dyes. This study aimed toevaluate the biodegradation of the azo dye Direct Red 75 in two treatment systems with different carriers.Methods Bioreactor Awas composed by an anaerobic bioreactor filled with Kaldnes K1 carriers employed in the MBBR technologyand the study was performed in 2 different temperatures, 30 ± 0.5 °C and 21 ± 2 °C. Biofilter B was composed by a sequencedanaerobic-aerobic system with rice husks as carriers and this study was performed at 21 ± 2 °C. The rice husks was also employed asa source of microorganisms in both systems. Decolourization, surface area of the carriers and other parameters were analysed.Results Biofilter B showed high rates of decolorization, mainly over 90% in all HRT tested (24, 48 and 12 h), presenting itself asa stable system, whereas Bioreactors A showed better performances with 48 h of HRT, about 85%for A at 30 ± 0.5 °C and 45%at21 ± 2 °C. With a similar amount of carriers, analyses showed that rice husks had a much larger surface for microorganisms togrow on than Kaldnes K1.Conclusion The Biofilter B is a worthwhile system to be investigated and applied for the decolourization of textile wastewatertreatment; for instance, in developing countries.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 17, no 2, p. 633-643
Keywords [en]
Decolourization, Rice husks, MBBR, Direct red 75, Textile wastewater treatment
National Category
Other Environmental Biotechnology
Research subject
Technology (byts ev till Engineering), Environmental Biotechnology
Identifiers
URN: urn:nbn:se:lnu:diva-84485DOI: 10.1007/s40201-019-00377-8ISI: 000514924000010PubMedID: 32030139OAI: oai:DiVA.org:lnu-84485DiVA, id: diva2:1319620
Available from: 2019-06-03 Created: 2019-06-03 Last updated: 2020-03-19Bibliographically approved

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Santos-Pereira, Graziely CristinaForss, Jörgen

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