期刊
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
卷 54, 期 -, 页码 118-124出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2015.03.012
关键词
Azo-dye; Anaerobic sequencing batch reactor; Denaturing gradient gel electrophoresis; Decolorization
资金
- National Natural Science Foundation of China [51308300]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Innovation and Entrepreneurship Training Program of Jiangsu Province and High Degree Talent Start-up Foundation of NFU [G2014007]
The start-up efficiency of an anaerobic sequencing batch reactor (ASBR) fed with increasing methyl orange (MO) concentrations (from 25 mgl(-1) to 500 mgl(-1)) were investigated in this study. The relationship between MO decolorization capacity and the microbial community structure was evaluated. More than 85% of COD and 75% of MO were removed during the whole operation period. However, little methane was generated, due to the successful competition of azo reduction over sulfate reduction and methanogenesis. The scanning electron microscopy and denaturing gradient gel electrophoresis analysis showed a significant variation of the microbial community composition with MO concentration increase. The thresholds of structural and functional disturbances were similar, suggesting a good correlation between degradation performance and community structure. Phylogenetic analysis indicated that Sulfuricurvum and Anaerolineaceae family were the most abundant microorganisms in ASBR responsible for MO decolorization. Batch experiments indicated that acclimated sludge could also use quinoide and Fe(III) as the electron acceptors, thus allowing an efficient reduction of azo dye. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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