| Batch and continuous biodegradation of three model naphthenic acids in a circulating packed-bed bioreactor. | |
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MedLine Citation:
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PMID: 22154122 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Generation of process waters contaminated by naphthenic acids is a serious environmental concern associated with processing of the oil sands. This together with the necessity for sustainable use of water highlights the need for development of effective technologies such as bioremediation for treatment of these contaminated waters. In this work, a circulating packed bed bioreactor and a culture developed in our laboratory were used to study batch and continuous biodegradation of trans-4-methyl-cyclohexane carboxylic acid (trans-4MCHCA), a mixture of cis- and trans-4-methyl-cyclohexane acetic acid (4-MCHAA), and mixture of these three naphthenic acids. Experimental results revealed that the biodegradability of the naphthenic acids was influenced by both carbon number and the spatial arrangement of the alkyl side branch. The maximum biodegradation rate of trans-4MCHCA observed during the continuous operation (209mg/Lh at a residence time of 0.15h) was significantly higher than those reported for CSTR and packed-bed bioreactors. The biodegradation rates of cis- and trans-4-MCHAA were much lower than trans-4MCHCA, with the maximum biodegradation rates determined for the two isomers being 4.2 and 7.8mg/Lh, respectively (residence time: 3.3h). |
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Authors:
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Jeff Huang; Mehdi Nemati; Gordon Hill; John Headley |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-23 |
Journal Detail:
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Title: Journal of hazardous materials Volume: - ISSN: 1873-3336 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-12-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Canada, S7N 5A9. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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