AccScience Publishing / AJWEP / Volume 8 / Issue 4 / DOI: 10.3233/AJW-2011-8_4_04
RESEARCH ARTICLE

Biological Denitrification of Ground Water Using Various Carbon Sources by Pseudomonas Fluorescens and Pseudomonas Stutzeri in a Hetrotrophic Denitrification Reactor

Archna 1* R.C. Sobti2 d S.K. Sharma4
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1 Department of Chemical Engineering, MS Ramaiah Institute of Technology, Bangalore – 560054
2 Department of Biotechnology, Panjab University, Chandigarh – 160014
3 Department of Chemical Engineering, Panjab University, Chandigarh –160014
AJWEP 2011, 8(4), 21–25; https://doi.org/10.3233/AJW-2011-8_4_04
Submitted: 1 March 2011 | Accepted: 2 June 2011 | Published: 1 January 2011
© 2011 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

A pilot plant study has been performed on biological removal of nitrate using heterotrophic denitrification reactor. The system behaviour has been analysed with the usage of – (i) three carbon sources (cotton, wheat straw and wood shavings), (ii) two microbial strains (Pseudomonas fluorescens NCIM 5059 and Pseudomonas stutzeri NCIM 5136) and (iii) at different temperatures. An optimal operating mode for 90% nitrate removal has been achieved by Pseudomonas fluorescens with inlet nitrate concentration of 200 ppm, flow rate 2.5 ml/min, carbon source cotton, temperature 30°C±0.5°C and for Pseudomonas stutzeri at same process conditions but with the temperature of 40°C±0.5°C. The feasibility of nitrate removal was also tested with carbon source as wood shavings and wheat straw.

Keywords
Denitrification
heterotrophic denitrification reactor (HDR)
trickling sand filter (TSF)
solid natural carbon source
Conflict of interest
The authors declare they have no competing interests.
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Asian Journal of Water, Environment and Pollution, Electronic ISSN: 1875-8568 Print ISSN: 0972-9860, Published by AccScience Publishing