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Shifts in microbial community in response to dissolved oxygen levels in activated sludge

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Title Shifts in microbial community in response to dissolved oxygen levels in activated sludge
 
Creator Yadav, Trilok Chandra
Khardenavis, Anshuman
Kapley, A
 
Subject Industrial Wastewater Treatment & Disposal
Environmental Biotechnology
Microbiology
 
Description This study evaluates the degradative efficiency of activated biomass collected from a Common Effluent
Treatment Plant (CETP) under three different dissolved oxygen (DO) levels, 1, 2 and 4 mg l�1. The change
in bacterial diversity with reference to DO levels was also analyzed. Results demonstrate that degradative
efficiency was the highest, when the reactor was maintained at 4 mg l�1 DO, but amplicon library analysis
showed a greater diversity of bacteria in the reactor maintained at 2 mg l�1 DO. Bacteria belonging to the
order Desulfuromonadales, Entomoplasmatales, Pasteurellales, Thermales and Chloroflexales have only
been detected in this reactor. Ammonia and nitrate levels in all three reactors indicated efficient nitrification
process. Results of this study offer new insights into understanding the performance of activated
biomass vis-à-vis microbial diversity and degradative efficiency with reference to DO. This information
would be useful in improving the efficiency of any wastewater treatment plant.
 
Publisher Elsevier
 
Date 2014
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/734/1/Activated%20sludge%20DO_Biores%20Tech.pdf
Yadav, Trilok Chandra and Khardenavis, Anshuman and Kapley, A (2014) Shifts in microbial community in response to dissolved oxygen levels in activated sludge. Bioresource Technology, 165. pp. 257-264. ISSN 0960-8524
 
Relation https://www.journals.elsevier.com/bioresource-technology/
http://neeri.csircentral.net/734/