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Aerobic Denitrification of Pseudomonas putida AD-21 at Different C/N Ratios

Paper ID Volume ID Publish Year Pages File Format Full-Text
21528 43226 2008 5 PDF Available
Title
Aerobic Denitrification of Pseudomonas putida AD-21 at Different C/N Ratios
Abstract

An aerobic denitrifier was newly isolated from soil and its denitrification activity under different C/N (carbon/nitrogen) ratios was investigated. The isolate was identified as Pseudomonas putida AD-21 by biochemical studies and 16s rDNA sequencing analysis. P. putida AD-21 tolerated oxygen levels of 5.0–6.0 mg/l. An 15NH4/14NO3 analysis indicated that the nitrogen of NH4 was preferentially assimilated into the cell mass and that the nitrate removed could be considered an indication of bacterial denitrification efficiency. Increasing the C/N ratio increased the nitrate removal rates, whereas nitrogen assimilation into the cell mass was not affected. The optimal C/N ratio was 8 with a maximum nitrate removal rate of 254.6 mg/l/h and a nitrate removal efficiency of 95.9%. The results suggest that P. putida AD-21 may be a good candidate for aerobic wastewater treatment.

Keywords
aerobic denitrification; C/N ratio; 15N/14N analysis; Pseudomonas putidaAD-21
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Aerobic Denitrification of Pseudomonas putida AD-21 at Different C/N Ratios
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 106, Issue 5, November 2008, Pages 498–502
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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