| Treatment of aquarium water by denitrifying photosynthetic bacteria using immobilized polyvinyl alcohol beads. | |
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MedLine Citation:
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PMID: 16232449 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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During the purification of an aquarium for carp breeding, a relatively high level of chemical oxygen demand (COD) was removed by filtration systems packed with both alginate- and polyvinyl alcohol (PVA)-immobilized gel beads of Rhodobacter sphaeroides S. Low nitrate accumulation was observed in the alginate gel beads packed system due to denitrification, but high levels of nitrate and nitrite accumulation were observed in the PVA gel beads packed system. This phenomenon was caused by the inhibitory effect of PVA on nitrite reductase. The boric acid used for hardening gel beads of PVA slightly inhibited nitrate reductase. On the other hand, during the denitrifying growth experiments for this strain, boric acid inhibited cell growth, but PVA only partially inhibited cell growth. Based on electron equivalent (Y(eq.)), growth yields using various kinds of concentrations of PVA were almost identical. It was suggested that PVA might only limit the growth rate of this strain by the inhibition of nitrite reductase. |
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Authors:
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H Nagadomi; T Hiromitsu; K Takeno; M Watanabe; K Sasaki |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of bioscience and bioengineering Volume: 87 ISSN: 1389-1723 ISO Abbreviation: J. Biosci. Bioeng. Publication Date: 1999 |
Date Detail:
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Created Date: 2005-10-19 Completed Date: 2005-10-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888800 Medline TA: J Biosci Bioeng Country: Japan |
Other Details:
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Languages: eng Pagination: 189-93 Citation Subset: - |
Affiliation:
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Nagao Co. Ltd., 256 Miyaura, Okayama 729-2121, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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