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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
document
van den Berg, E.M. (author), Elisario, Marina P. (author), Kuenen, J.G. (author), Kleerebezem, R. (author), van Loosdrecht, M.C.M. (author)
Denitrification and dissimilatory reduction to ammonium (DNRA) are competing nitrate-reduction processes that entail important biogeochemical consequences for nitrogen retention/removal in natural and man-made ecosystems. The nature of the available carbon source and electron donor have been suggested to play an important role on the outcome of...
journal article 2017
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van den Berg, E.M. (author), Rombouts, J.L. (author), Kuenen, J.G. (author), Kleerebezem, R. (author), van Loosdrecht, M.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
document
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
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van den Berg, E.M. (author), Boleij, M. (author), Kuenen, J.G. (author), Kleerebezem, R. (author), van Loosdrecht, M.C.M. (author)
Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) compete for nitrate in natural and engineered environments. A known important factor in this microbial competition is the ratio of available electron donor and elector acceptor, here expressed as Ac/N ratio (acetate/nitrate-nitrogen). We studied the impact of the Ac/N ratio...
journal article 2016
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Kampschreur, M.J. (author), Kleerebezem, R. (author), Picioreanu, C. (author), Bakken, L. (author), Bergaust, L. (author), De Vries, S. (author), Jetten, M.S.M. (author), Van Loosdrecht, M.C.M. (author)
A metabolic network model for facultative denitrification was developed based on experimental data obtained with Agrobacterium tumefaciens. The model includes kinetic regulation at the enzyme level and transcription regulation at the enzyme synthesis level. The objective of this work was to study the key factors regulating the metabolic response...
journal article 2012
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Kampschreur, M.J. (author), Kleerebezem, R. (author), Picioreanu, C. (author), Bakken, L. (author), Bergaust, L. (author), De Vries, S. (author), Jetten, M.S.M. (author), Van Loosdrecht, M.C.M. (author)
journal article 2012
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Bassin, J.P. (author)
The removal of nutrients such as nitrogen and phosphorus from both domestic and industrial wastewaters is imperative since they potentially harm the environment. One of the main consequences of excessive availability of nitrogen and phosphorus in aquatic ecosystems (freshwater, marine and estuarine) is the overgrowth of algae and other aquatic...
doctoral thesis 2012
document
Kampschreur, M.J. (author)
Nitric oxide (NO) and nitrous oxide (N2O) emissions can be a serious threat to the environment. Rising levels of N2O in the atmosphere contribute to global warming and destruction of the ozone layer. This thesis describes an investigation on the emission of NO and N2O during nitrogen conversion processes. Emissions were measured at wastewater...
doctoral thesis 2010
document
De Kreuk, M.K. (author)
Most conventional wastewater treatment plants need a large surface area for the treatment of their sewage. This is due to the open structure of the biomass used to convert the polluting components in wastewater. Because of the flocculated growth, sludge concentrations in reaction tanks are low and settling times need to be long in order to keep...
doctoral thesis 2006
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Risgaard-Petersen, N. (author), Meyer, R.L. (author), Schmid, M. (author), Jetten, M.S.M. (author), Enrich-Prast, A. (author), Rysgaard, S. (author), Revsbech, N.P. (author)
The occurrence and significance of the anammox (anaerobic ammonium oxidation) process relative to denitrification was studied in photosynthetically active sediment from 2 shallow-water estuaries: Randers Fjord and Norsminde Fjord, Denmark. Anammox accounted for 5 to 24% of N2 production in Randers Fjord sediment, whereas no indication was seen...
journal article 2004
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van de Graaf, A.A. (author)
doctoral thesis 1997
document
Van Niel, E.W.J. (author), Braber, K.J. (author), Robertson, L.A. (author), Kuenen, J.G. (author)
journal article 1992
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