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van der Hoek, J.P. (author), Deng, Tianyi (author), Spit, Tiza (author), Luimstra, Veerle (author), de Kreuk, M.K. (author), van Halem, D. (author)Organic micropollutants (OMPs) enter the aquatic environment via municipal wastewater treatment plants (WWTPs). As conventional WWTPs have limited capacity for the removal of OMPs, additional processes are required, like ozone - granular activated carbon (GAC) filtration. A specific lay-out of this process is the O3-STEP® process, in which the...journal article 2024
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Strubbe, Laurence (author), van Dijk, E.J.H. (author), Carrera, Paula (author), van Loosdrecht, Mark C.M. (author), Volcke, Eveline I.P. (author)The aerobic granular sludge (AGS) process treats wastewater with a significantly lower footprint and energy consumption compared to conventional activated sludge systems. Nevertheless, there is still potential for optimizing its performance, and mathematical models are most valuable tools to this end. Aeration energy consumption deserves...journal article 2024
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Kamath, P. (author), Rubio-Rincón, F. J. (author), Brdjanovic, Damir (author), Lopez-Vazquez, C. M. (author)Photo-activated sludge (PAS) system aims to utilize microalgae to deliver oxygen for bacterial respiration, eliminating the need for external aeration. However, research on the treatment potential of PAS systems in the removal of nutrients is limited. In this context, a research study was devised to evaluate the possibility of developing a...journal article 2024
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Nouri, Amir (author), Zinatizadeh, Ali Akbar (author), Zinadini, Sirus (author), van Loosdrecht, Mark C.M. (author)This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime. The objective is to enhance nitrogen removal from synthetic wastewater with a low carbon-to-nitrogen (C/N) ratio. The chemical oxygen demand (COD) and total nitrogen (TN) of the influent wastewater were 500 and 200 mg/L,...journal article 2024
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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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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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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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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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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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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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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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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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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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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