Nitrogen transforming community in a horizontal subsurface-flow constructed wetland

Water Research
Oksana CobanKay Knoeller

Abstract

Constructed wetlands are important ecosystems with respect to nitrogen cycling. Here we studied the activity and abundance of nitrogen transforming bacteria as well as the spatial distribution of nitrification, anaerobic ammonium oxidation (anammox), and denitrification processes in a horizontal subsurface-flow constructed wetland. The functional genes of the nitrogen cycle were evenly distributed in a linear way along the flow path with prevalence at the superficial points. The same trend was observed for the nitrification and denitrification turnover rates using isotope labeling techniques. It was also shown that only short-term incubations should be used to measure denitrification turnover rates. Significant nitrate consumption under aerobic conditions diminishes nitrification rates and should therefore be taken into account when estimating nitrification turnover rates. This nitrate consumption was due to aerobic denitrification, the rate of which was comparable to that for anaerobic denitrification. Consequently, denitrification should not be considered as an exclusively anaerobic process. Phylogenetic analysis of hydrazine synthase (hzsA) gene clones indicated the presence of Brocadia and Kuenenia anammox species in the co...Continue Reading

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Citations

Jul 6, 2016·Water Research·Nikolaos V ParanychianakisNicolas Kalogerakis
Nov 9, 2016·Applied Microbiology and Biotechnology·Liang ChenJin-Shui Wu
May 1, 2016·Applied and Environmental Microbiology·Vanessa LünsmannNico Jehmlich
Dec 14, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Guangyi ZhangXiaojing Zhang
Mar 8, 2019·International Journal of Environmental Research and Public Health·Yinghai WuRui Han
Oct 25, 2017·Environmental Science and Pollution Research International·Hao WangGuozhu Bo
Jun 23, 2019·Folia Microbiologica·Tianli TongShuguang Xie
Jan 7, 2021·Environmental Science and Pollution Research International·Xinyi WangRui Cheng
Oct 13, 2018·The Science of the Total Environment·Jing LiLi-Juan Cui
Dec 2, 2020·The Science of the Total Environment·Columba Martínez-EspinosaJosé Miguel Sánchez-Pérez
Jun 25, 2020·Journal of Environmental Management·Thomas V WagnerAlette A M Langenhoff
Jun 21, 2020·The Science of the Total Environment·Wen JiaLiuyan Yang
Mar 19, 2021·Environmental Science and Pollution Research International·Jing ChengXi Jin
Feb 14, 2021·Applied and Environmental Microbiology·Oksana CobanBrad M Bebout

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