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Simultaneous biodegradation of nitrogen-containing aromatic compounds in a sequencing batch bioreactor

Title data

Liu, Xing-Yu ; Wang, Bao-Jun ; Jiang, Cheng-Ying ; Zhao, Ke-Xin ; Drake, Harold L. ; Liu, Shuang-Jiang:
Simultaneous biodegradation of nitrogen-containing aromatic compounds in a sequencing batch bioreactor.
In: Journal of Environmental Sciences. Vol. 19 (2007) Issue 5 . - pp. 530-535.
ISSN 1001-0742
DOI: https://doi.org/10.1016/S1001-0742(07)60088-6

Abstract in another language

Many nitrogen-containing aromatic compounds (NACs), such as nitrobenzene (NB), 4-nitrophenol (4-NP), aniline (AN), and 2,4-dinitrophenol (2,4-DNP), are environmentally hazardous, and their removal from contaminated water is one of the main challenges facing wastewater treatment plants. In this study, synthetic wastewater containing NB, 4-NP, 2,4-DNP, and AN at concentrations ranging from 50 to 180 mg/L was fed into a sequencing batch reactor (SBR). Analyses of the SBR system indicated that it simultaneously removed more than 99% of the NACs at loading rates of 0.36 kg NB/(m3_d), 0.3 kg 4-NP/(m3_d), 0.25 kg AN/(m3_d), and 0.1 kg 2,4-DNP/(m3_d). Bacterial groups of Bacteriodetes, Candidate division TM7, alpha-Proteobacteria, and beta-Proteobacteria were dominant in the clone libraries of 16S rRNA genes retrieved from the microbial communities in the SBR system. “Cycle tests” designed to alter feeding and aeration parameters of the SBR system demonstrated that the resident microbial biome of the SBR system responded rapidly to changing conditions. Consumption of O2 was concomitant with the apparent mineralization of NACs. Aromatic ring-cleaving dioxygenase activities suggested that (1) AN and NB were degraded via catechol 2,3-dioxygenase; (2) 4-NP was degraded via 1,2,4-benzentriol 1,2-dioxygenase; and (3) 2,4-DNP was degraded via an unresolved pathway.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER40772
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Ecological Microbiology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 29 Jul 2015 05:53
Last Modified: 29 Jul 2015 05:53
URI: https://eref.uni-bayreuth.de/id/eprint/17398