Hellman, Maria Hubalek, Valerie Juhanson, Jaanis Almstrand, Robert Peura, Sari Hallin, Sara
Published in
The Science of the total environment
High levels of nitrogen originating from blasting operations, for example at mining sites or quarries, risk contaminating water bodies through leaching from waste rock dumps. Woodchip bioreactors can be a simple and cost-effective way of reducing nitrate concentrations in the leachate. In this study we investigated how bottle sedge, barley straw, a...
Marzocchi, Ugo Bonaglia, Stefano Zaiko, Anastasija Quero, Grazia M. Vybernaite-Lubiene, Irma Politi, Tobia Samuiloviene, Aurelija Zilius, Mindaugas Bartoli, Marco Cardini, Ulisse
...
Published in
Frontiers in Microbiology
Bivalves are ubiquitous filter-feeders able to alter ecosystems functions. Their impact on nitrogen (N) cycling is commonly related to their filter-feeding activity, biodeposition, and excretion. A so far understudied impact is linked to the metabolism of the associated microbiome that together with the host constitute the mussel’s holobiont. Here ...
Zhou, Lijie Zhao, Bikai Ou, Pingxiang Zhang, Wenyu Li, Haixiang Yi, Shan Zhuang, Wei-Qin
Published in
Bioresource technology
Core nitrogen cycle within biofoulant in full-scale anoxic & oxic biofilm-membrane bioreactor (bMBR) treating textile wastewater was investigated. Wastewater filtered through membrane with biofoulant had elevated NH4+-N and NO2--N concentrations corresponding to decreased NO3--N concentrations. Nevertheless, total nitrogen concentrations did not ch...
Wang, Qingkun Rogers, Matthew James Ng, Sir Sing He, Jianzhong
Published in
Water research
Wetland ecosystems play an important role in nitrogen cycling, yet the role of anaerobic ammonium oxidation (anammox) in tropical wetlands remains unclear. In the current study the anammox process accounted for 29.8 ~ 57.3% of nitrogen loss in ex situ activity batch tests of microcosms established from anoxic sediments of different tropical wetland...
Nojiri, Yosuke Kaneko, Yuka Azegami, Yoichi Shiratori, Yutaka Ohte, Nobuhito Senoo, Keishi Otsuka, Shigeto Isobe, Kazuo
Published in
Microbes and Environments
Nitrification–denitrification processes in the nitrogen cycle have been extensively examined in rice paddy soils. Nitrate is generally depleted in the reduced soil layer below the thin oxidized layer at the surface, and this may be attributed to high denitrification activity. In the present study, we investigated dissimilatory nitrate reduction to ...
Giannopoulos, Georgios Hartop, Katherine R. Brown, Bonnie L. Song, Bongkeun Elsgaard, Lars Franklin, Rima B.
Published in
Frontiers in Microbiology
We investigated the effects of trace metal additions on microbial nitrogen (N) and carbon (C) cycling using freshwater wetland sediment microcosms amended with micromolar concentrations of copper (Cu), molybdenum (Mo), iron (Fe), and all combinations thereof. In addition to monitoring inorganic N transformations (NO3–, NO2–, N2O, NH4+) and carbon m...
Ding, Xinghua Lan, Wenshen Wu, Jiapeng Hong, Yiguo Li, Yiliang Ge, Qingya Urzì, Clara Katayama, Yoko Gu, Ji-Dong
Published in
Applied Microbiology and Biotechnology
Preah Vihear temple is one of the most significant representatives of the ancient Angkorian temples listed as United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage Sites. The surfaces of this Angkor sandstone monument are covered with deteriorated materials, broadly called “sediments” here, resulting from a long t...
Aalto, Sanni L Suurnäkki, Suvi von Ahnen, Mathis Siljanen, Henri M P Pedersen, Per Bovbjerg Tiirola, Marja
Published in
The Science of the total environment
Woodchip bioreactors are viable low-cost nitrate (NO3-) removal applications for treating agricultural and aquaculture discharges. The active microbial biofilms growing on woodchips are conducting nitrogen (N) removal, reducing NO3- while oxidizing the carbon (C) from woodchips. However, bioreactor age, and changes in the operating conditions or in...
Tang, Mengjuan Deng, Qinghui Li, Xiaowen Cao, Xiuyun Zhang, Zhimin Zhou, Yiyong Sun, Qingye Song, Chunlei
Published in
Environmental Sciences Europe
BackgroundAchieving nitrogen (N) and phosphorus (P) control in sediment remediation projects by adding natural materials is receiving increasing attention. In this study, different natural materials, including iron-rich clay minerals, calcite, kaoline, sugarcane bagasse and Phragmites detritus, were applied to test their effects on N and P in a mes...
Cojean, Adeline N Y Lehmann, Moritz F Robertson, Elizabeth K Thamdrup, Bo Zopfi, Jakob
Published in
Frontiers in microbiology
Understanding the biogeochemical controls on the partitioning between nitrogen (N) removal through denitrification and anaerobic ammonium oxidation (anammox), and N recycling via dissimilatory nitrate (NO3 -) reduction to ammonium (DNRA) is crucial for constraining lacustrine N budgets. Besides organic carbon, inorganic compounds may serve as elect...
