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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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Kraaijeveld, E. (author), Rijsdijk, S. (author), van der Poel, S. (author), van der Hoek, J.P. (author), Rabaey, K. (author), van Halem, D. (author)The mechanisms and by-product formation of electrochemical oxidation (EO) for As(III) oxidation in drinking water treatment using groundwater was investigated. Experiments were carried out using a flowthrough system, with an RuO <sub>2</sub>/IrO <sub>2</sub> MMO Ti anode electrode, fed with synthetic and natural groundwater containing As(III)...journal article 2024
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Trikannad, S.A. (author), Attiani, Valentina (author), van der Wielen, Paul W.J.J. (author), Smidt, Hauke (author), van der Hoek, J.P. (author), van Halem, D. (author)Slow sand filters (SSFs) are widely used in drinking water production to improve microbial safety and biological stability of water. Full-scale SSFs are maintained by scraping the biomass-rich top layers of sand. The period of downtime required for filter recovery after scraping is a major challenge due to limited knowledge of the re...journal article 2024
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Trikannad, S.A. (author), van Halem, D. (author), Foppen, J.W.A. (author), van der Hoek, J.P. (author)Slow Sand Filtration is popular in drinking water treatment for the removal of a wide range of contaminants (e.g., particles, organic matter, and microorganisms). The Schmutzdecke in slow sand filters (SSFs) is known to be essential for pathogen removal, however, this layer is also responsible for increased head loss. Since the role of deeper...journal article 2023
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Spit, T.P.M. (author), van der Hoek, J.P. (author), de Jong, Coen (author), van Halem, D. (author), de Kreuk, M.K. (author), Bicudo, Bruno (author)At wastewater treatment plants (WWTPs), additional steps are introduced for removal of organic micropollutants (OMPs) from the treated effluents, especially pharmaceutical residues. At the same time, a new concern is emerging: antibiotic resistance (AR). This research studied the effect of ozonation, coagulation and granular activated carbon ...journal article 2022
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Wang, F. (author), Salgado Ismodes, V.A. (author), van der Hoek, J.P. (author), van Halem, D. (author)The removal of bromate (BrO<sub>3</sub> <sup>-</sup>) as a byproduct of ozonation in subsequent managed aquifer recharge (MAR) systems has so far gained little attention. This preliminary study with anoxic batch experiments was executed to explore the feasibility of chemical BrO<sub>3</sub> <sup>-</sup> reduction in Fe-reducing zones of MAR...journal article 2018
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Wang, F. (author), van Halem, D. (author), Liu, G. (author), Lekkerkerker, K. (author), van der Hoek, J.P. (author)H2O2 residuals from advanced oxidation processes (AOPs) may have critical impacts on the microbial ecology and performance of subsequent biological treatment processes, but little is known. The objective of this study was to evaluate how H2O2 residuals influence sand systems with an emphasis on dissolved organic carbon (DOC) removal, microbial...journal article 2017
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- Wang, F. (author), van Halem, D. (author), van der Hoek, J.P. (author) journal article 2016