Special Issue "Nitrogen Cycling in the Aquatic Ecosystem"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 1114

Special Issue Editors

Institute of Agricultural Bio-Environmental Engineering, College of Bio-Systems Engineering and Food Science/The Rural Development Academy, Zhejiang University, Hangzhou 310058, China
Interests: waste water treatment; denitrification; nitrification; biological treatment; resource recovery
School of Life and Environment, Hangzhou Normal University, Hangzhou 311121, China
Interests: denitrification; antibiotics; biochar; wetlands; wastewater treatment

Special Issue Information

Dear Colleagues,

Nitrogen plays important roles in the aquatic ecosystems. Nitrification, denitrification, and anammox are the three critical processes during nitrogen cycling, especially in man-made facilities, such as wastewater treatment plants. Therefore, nitrate management is very important due to its contribution to environmental eutrophication, as well as its explicit long-term stress effect on cultured species during intensive fish farming. This Special Issue aims to invite contributions that explore the mitigation, transformation of nitrogen, and the mechanism of nitrogen cycling in the aquatic ecosystem.

Example topics of interest include, but are not limited to: microbial-based technology for nitrate-removal from wastewater; bacteria isolation for nitrification and denitrification under aerobic or anoxic conditions; nitrate-removal based on biodegradable polymers; and effect of emerging pollutants (such as antibiotics, microplastics) on nitrogen cycling.

Prof. Dr. Yunjie Ruan
Prof. Dr. Wenbing Li
Guest Editors

Manuscript Submission Information

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  • denitrification
  • nitrification
  • anammox
  • solid-phase carbon
  • wastewater treatment
  • bioplastics
  • antibiotics
  • biochar
  • wetlands

Published Papers (1 paper)

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14 pages, 2805 KiB  
Effect of Sulfide on the Processes of Transformation of Nitrogen Compounds and the Microbial Community Composition in the Anammox Bioreactor
Water 2023, 15(15), 2798; https://doi.org/10.3390/w15152798 - 02 Aug 2023
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Anammox is one of the most important processes in the global nitrogen cycle and the basis for an efficient technology of nitrogen removal from wastewater. The effect of the presence of sulfide in wastewater on the transformation of nitrogen compounds by the anammox [...] Read more.
Anammox is one of the most important processes in the global nitrogen cycle and the basis for an efficient technology of nitrogen removal from wastewater. The effect of the presence of sulfide in wastewater on the transformation of nitrogen compounds by the anammox community has been insufficiently studied. The present work dealt with the effect of sulfide on nitrogen removal efficiency and the dynamics of nitrogen species in a laboratory sequencing batch bioreactor modeling the functioning of the anammox community carrying out ammonium oxidation via nitritation and anammox and nitrite oxidation. The 16S rRNA gene profiling of the community of the anammox-activated sludge attached to the stationary carrier revealed members of the key physiological groups: ammonium oxidizers of the genus Nitrosomonas, nitrite oxidizers of the genus Nitrosospira, and anammox bacteria of the genera Candidatus Brocadia and Ca. Jettenia, as well as members of other bacterial genera. Nitrate removal was not sensitive to sulfide at concentrations up to 50 mg S/L and decreased by 17% at 100 mg/L. The threshold of sulfide sensitivity for group I nitrifiers was ~50 mg/L, while anammox bacteria were resistant to sulfide concentrations of up to 100 mg S/L in the incoming water. Group II nitrifiers were probably the most sulfide-sensitive components of the community. A drastic increase in the abundance of members of the family Hydrogenophilaceae at elevated sulfide concentrations, together with the precipitation of elemental sulfur, may indicate sulfide oxidation either by molecular oxygen or via nitrate reduction; this finding requires further investigation. This is the first report on the different effects of sulfide on the growth rate of members of the nitrifying genus Nitrosomonas, increasing/decreasing or not affecting it for different phylotypes at elevated sulfide concentrations. Full article
(This article belongs to the Special Issue Nitrogen Cycling in the Aquatic Ecosystem)
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