Dissimilatory nitrate reduction by Pseudomonas alcaliphila with an electrode as the sole electron donor

Biotechnology and Bioengineering
Wentao SuYong Tao

Abstract

Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) were considered two alternative pathways of dissimilatory nitrate reduction. In this study, we firstly reported that both denitrification and DNRA occurred in Pseudomonas alcaliphila strain MBR with an electrode as the sole electron donor in a double chamber bio-electrochemical system (BES). The initial concentration of nitrate appeared as a factor determining the type of nitrate reduction with electrode as the sole electron donor at the same potential (-500 mV). As the initial concentration of nitrate increased, the fraction of nitrate reduced through denitrification also increased. While nitrite (1.38 ± 0.04 mM) was used as electron acceptor instead of nitrate, the electrons recovery via DNRA and denitrification were 43.06 ± 1.02% and 50.51 ± 1.37%, respectively. The electrochemical activities and surface topography of the working electrode catalyzed by strain MBR were evaluated by cyclic voltammetry and scanning electron microscopy. The results suggested that cells of strain MBR were adhered to the electrode, playing the role of electron transfer media for nitrate and nitrite reduction. Thus, for the first time, the results that DNRA and denitrification o...Continue Reading

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Citations

Apr 24, 2013·Environmental Science & Technology·Bin LiangDuu-Jong Lee
Feb 26, 2016·Journal of Bioscience and Bioengineering·Zhixing XiaoArata Katayama
Mar 30, 2016·Journal of Industrial Microbiology & Biotechnology·Van Khanh NguyenTaeho Lee
Sep 12, 2013·International Journal of Systematic and Evolutionary Microbiology·Yong TaoDaping Li
Dec 9, 2014·Bioelectrochemistry·Pascal F Beese-VasbenderKarl J J Mayrhofer
Apr 28, 2016·Environmental Science and Pollution Research International·Van Khanh NguyenTaeho Lee
Jun 7, 2015·Applied and Environmental Microbiology·Xin WangAnhuai Lu
Jan 14, 2020·Nanotechnology·Mon Oo YeeAmelia-Elena Rotaru
Mar 25, 2019·Journal of Microbiological Methods·Jordan CannonJoanne Chee-Sanford
May 22, 2021·International Journal of Systematic and Evolutionary Microbiology· TimsyUndine Behrendt
May 18, 2021·Biofilm·Poehere ChongAlain Bergel
Jul 3, 2021·The Science of the Total Environment·Yunmeng Pang, Jianlong Wang

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