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Ochs, Pascal (author), Martin, Ben (author), Germain-Cripps, Eve (author), Stephenson, Tom (author), van Loosdrecht, Mark C.M. (author), Soares, Ana (author)Over the past twenty years, various commercial technologies have been deployed to remove ammonia (NH<sub>4</sub>–N) from anaerobic digestion (AD) liquors. In recent years many anaerobic digesters have been upgraded to include a pre-treatment, such as the thermal hydrolysis process (THP), to produce more biogas, increasing NH<sub>4</sub>–N...journal article 2023
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Buisma-Yi, S.C. (author), Meza Ramos, P.N. (author), Oonk, Hans (author), Gebert, J. (author)In the Netherlands, three full-scale pilots have been in operation for approximately five years to understand the effects of leachate recirculation or aeration on waste stabilisation. This study employs the ratio of N2 to Ar in the landfill gas in comparison to the ratio in atmospheric air to derive the share of N2 that originates from...conference paper 2023
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Biological Bromate Reduction in the O3 -STEP Filter: Mechanism and Relationship with DenitrificationDeng, Tianyi (author)Bromate is a possible human carcinogen that does not naturally exist in surface or groundwater bodies. Its formation mostly results from ozonating bromide-containing water during wastewater treatment or drinking water production. Bromate is difficult to remove from water due to its high solubility and low reactivity in the aqueous environment;...master thesis 2022
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Lyu, Haozheng (author)Fine sieved fraction (FSF) is a solid waste generated from wastewater treatment plants (WWTPs). Cellulose fiber is the most important component of FSF, which can be fermented into volatile fatty acids (VFAs) and then be used as carbon sources in biological nutrient removal (BNR). This thesis measured and evaluated the aerobic & anaerobic...master thesis 2022
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Kruisdijk, E. (author), Eisfeld, R.C.M. (author), Stuyfzand, Pieter Jan (author), van Breukelen, B.M. (author)An aquifer storage transfer and recovery (ASTR) system was studied in which tile drainage water (TDW) was injected with relatively high NO<sub>3</sub> (about 14 mg/L) concentrations originating from fertilizers. Here we present the evolution of denitrification kinetics at 6 different depths in the aquifer before, and during ASTR operation....journal article 2022
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Zhou, Jianmin (author), Ding, Lei (author), Shi, Mu (author), Lindeboom, R.E.F. (author), Cui, Changzheng (author)In the envisaged hydrogen economy, H<sub>2</sub> could be an interesting alternative electron donor for the denitrification of drinking water or wastewater. The main obstacle to engineering the hydrogenotrophic denitrification process is the low solubility of H<sub>2</sub> in water under atmospheric pressure, which limits denitrification rate...journal article 2022
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Estevez Alonso, A. (author), van Loosdrecht, Mark C.M. (author), Kleerebezem, R. (author), Werker, A. (author)Microbial community-based polyhydroxyalkanoate (PHA) production has been demonstrated repeatedly at pilot scale. Ammonium, normally present in waste streams, might be oxidized by nitrifying bacteria resulting in additional aeration energy demand. The use of low dissolved oxygen (DO) concentrations allowed to reduce nitrifying rates by up to...journal article 2021
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Kleerebezem, R. (author), Lücker, Sebastian (author)The cyclic nature of specific conversions in the nitrogen cycle imposes strict limitations to the conversions observed in nature and explains for example why anaerobic ammonium oxidation (anammox) bacteria can only use nitrite – and not nitrate – as electron acceptor in catabolism, and why nitrite is required as additional electron donor for...journal article 2021
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Reactive transport modelling of push-pull tests: A versatile approach to quantify aquifer reactivityKruisdijk, E. (author), van Breukelen, B.M. (author)Push-pull tests (PPTs) were evaluated with 1-D radially axisymmetric multi-component geochemical reactive transport modelling (RTM) to assess aquifer reactivity controlling groundwater quality. Nutrient fate and redox processes were investigated in an Aquifer Storage and Recovery (ASR) system, in which oxic tile drainage water (TDW; nitrate ...journal article 2021
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LU, Mu-En (author)Comammox bacteria are capable of catalysing the full nitrification pathway – oxidation of ammonium to nitrate – and have been encountered in many ecosystems recently (Lawson & Lücker, 2018). What the ecological role of comammox bacteria is in hypoxic enrichment cultures remains unclear. Based on the thermodynamics and biochemistry of known...master thesis 2020
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Lutz, Stefanie R. (author), Trauth, Nico (author), Musolff, Andreas (author), van Breukelen, B.M. (author), Knöller, Kay (author), Fleckenstein, Jan H. (author)Riparian zones are important buffer zones for streams as they are hotspots of nitrate transformation and removal in agricultural catchments. However, mixing of water from different sources and various transformation processes can complicate the quantification of nitrate turnover in riparian zones. In this study, we analyzed nitrate...journal article 2020
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Sorokin, Dimitry Y. (author), Mosier, Damon (author), Zorz, J.K.T. (author), Dong, Xiaoli (author), Strous, Marc (author)A new haloalkaliphilic species of Wenzhouxiangella, strain AB-CW3, was isolated from a system of hypersaline alkaline soda lakes in the Kulunda Steppe using cells of Staphylococcus aureus as growth substrate. AB-CW3’s complete, circular genome was assembled from combined nanopore and Illumina sequencing and its proteome was determined for...journal article 2020
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Corbera Rubio, Francesc (author)Nitrous oxide (N2O) is a potent greenhouse gas, and its stratospheric concentration is already 20% above the pre-industrial level. Over 70% of N2O is produced by microbial processes. Nitrous oxide reductase is the only enzyme able to reduce N2O to innocuous N2. The high abundance of organisms harbouring it and lacking the genetic potential to...master thesis 2019
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Conthe Calvo, M. (author), Lycus, Pawel (author), Arntzen, Magnus (author), Ramos da Silva, Aline (author), Frostegård, Åsa (author), Bakken, Lars R. (author), Kleerebezem, R. (author), van Loosdrecht, Mark C.M. (author)The strong greenhouse gas nitrous oxide (N<sub>2</sub>O) can be emitted from wastewater treatment systems as a byproduct of ammonium oxidation and as the last intermediate in the stepwise reduction of nitrate to N<sub>2</sub> by denitrifying organisms. A potential strategy to reduce N<sub>2</sub>O emissions would be to enhance the activity of...journal article 2019
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Berben, Tom (author), Overmars, Lex (author), Sorokin, Dimitry Y. (author), Muyzer, Gerard (author)Soda lakes are saline alkaline lakes characterized by high concentrations of sodium carbonate/bicarbonate which lead to a stable elevated pH (>9), and moderate to extremely high salinity. Despite this combination of extreme conditions, biodiversity in soda lakes is high, and the presence of diverse microbial communities provides a driving...journal article 2019
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Rubio Rincon, F.J. (author), Weissbrodt, D.G. (author), Lopez-Vazquez, C. M. (author), Welles, L. (author), Abbas, B.A. (author), Albertsen, M. (author), Nielsen, P. H. (author), van Loosdrecht, Mark C.M. (author), Brdjanovic, Damir (author)Populations of “Candidatus Accumulibacter”, a known polyphosphate-accumulating organism, within clade IC have been proposed to perform anoxic P-uptake activity in enhanced biological phosphorus removal (EBPR) systems using nitrate as electron acceptor. However, no consensus has been reached on the ability of “Ca. Accumulibacter” members of...journal article 2019
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Hopman, Jessy (author)Recent developments in bio-based soil improvement techniques include the use of the bacterially mediated process of denitrification to alter engineering properties of soils. Pham (2017) used the denitrification process to stimulate the production of gas and precipitation of calcium carbonate as a soil improvement method. The ability to...master thesis 2018
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van den Berg, E.M. (author)The anthropogenic nitrogen inputs in the environment exceed the input by natural processes and impact the global nitrogen cycle considerably . Human meddling in the N-cycle occurs mainly in agricultural ecosystems. Loss of nitrogen from the agricultural soils, other than crop harvest, can have polluting effects on other environments. The three...doctoral thesis 2017
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van den Berg, E.M. (author), Rombouts, J.L. (author), Kuenen, J.G. (author), Kleerebezem, R. (author), van Loosdrecht, Mark C.M. (author)Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) are two microbial processes that compete for oxidized nitrogen compounds in the environment. The objective of this work was to determine the role of nitrite versus nitrate as terminal electron acceptor on the competition between DNRA and denitrification. Initially, a mixed...journal article 2017
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Rasigraf, Olivia (author), Schmitt, Julia (author), Jetten, M.S.M. (author), Lüke, Claudia (author)The biological nitrogen cycle is driven by a plethora of reactions transforming nitrogen compounds between various redox states. Here, we investigated the metagenomic potential for nitrogen cycle of the in situ microbial community in an oligotrophic, brackish environment of the Bothnian Sea sediment. Total DNA from three sediment depths was...journal article 2017