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https://hdl.handle.net/2440/79631
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Type: | Journal article |
Title: | Degradation of azo dye acid orange 7 in a membrane bioreactor by pellets and attached growth of Coriolus versicolour |
Author: | Hai, F. Yamamoto, K. Nakajima, F. Fukushi, K. Nghiem, L. Price, W. Jin, B. |
Citation: | Bioresource Technology, 2013; 141:29-34 |
Publisher: | Elsevier Sci Ltd |
Issue Date: | 2013 |
ISSN: | 0960-8524 1873-2976 |
Statement of Responsibility: | Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi, Long D. Nghiem, William E. Price and Bo Jin |
Abstract: | The aim of this study was to systematically compare the degradation of azo dye acid orange 7 by spongy pellets and attached biofilm of Coriolus versicolour (NBRC 9791) in a membrane bioreactor (MBR) under non-sterile conditions. Mild stirring (35 rpm) resulted in spherical (φ=0.5 cm), spongy pellets and concomitantly triggered high enzymatic activity of the fungus, allowing for excellent decolouration (>99%) of a synthetic wastewater containing the dye. However, bacterial contamination eventually damaged the fungus pellets, leading to decreased decolouration efficiency. Promotion of attached growth on a plastic support along with formation of spherical spongy pellets allowed maintenance of high enzymatic activity and decolouration/degradation for an extended period. Hydraulic retention time (HRT) could influence the level of enzymatic activity and decolouration; however, even at the shortest HRT (1 day) examined, the MBR could accomplish >95% decolouration. |
Keywords: | Biofilms Basidiomycota Azo Compounds Membranes, Artificial Bioreactors Water Purification Color Biodegradation, Environmental |
Rights: | © 2013 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.biortech.2013.02.020 |
Published version: | http://dx.doi.org/10.1016/j.biortech.2013.02.020 |
Appears in Collections: | Aurora harvest Chemical Engineering publications Environment Institute publications |
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