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Influence of the electron acceptor on nitrite reductase gene (nir) diversity in an activated sludge community

Paper ID Volume ID Publish Year Pages File Format Full-Text
21673 43234 2009 6 PDF Available
Title
Influence of the electron acceptor on nitrite reductase gene (nir) diversity in an activated sludge community
Abstract

Analyses of the nitrite reductase gene diversities (nirK and nirS) in an activated sludge community fed with both nitrite and glucose were conducted. Results suggest that the topology of nirK and nirS gene fragment-based phylogenetic trees is influenced more by the available electron acceptor than by the carbon source. A denitrification reactor was operated for 53 days and a clone library constructed when the denitrifying communities in the SBR were supplied with both nitrite and glucose. Half of the nirK and nearly all the nirS gene fragments formed a cluster that was separate from a cluster containing nirK and nirS sequences derived from other communities in nitrate-fed reactors. On the other hand, nirK and nirS fragments obtained with glucose as the carbon source were similar to those detected in communities fed with other carbon sources.

Keywords
Activated sludge; Denitrification; Electron acceptor; Nitrite reductase genes (nirK, nirS); Sequencing batch reactor (SBR); Wastewater treatment
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Influence of the electron acceptor on nitrite reductase gene (nir) diversity in an activated sludge community
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 108, Issue 5, November 2009, Pages 394–399
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
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Full-text PDF Download
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