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Microplastics van een textielwasserij en de verwijdering in een RWZI

Bertelkamp, Cheryl (author), Pieke, Eelco (author), Struker, Andre (author), Traast, Olivia (author), van der Hoek, J.P. (author)

Hoewel de rwzi’s Amsterdam-West en Horstermeer meer dan 99,8% van de microplastics verwijderen, blijft het absolute aantal dat in het milieu terechtkomt aanzienlijk. Tevens bleek dat één industriële textielwasserij verantwoordelijk is voor 13% van het totale aantal microplastics dat de rioolwaterzuivering binnenkomt.

journal article 2024

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Bromate removal in an ozone - granular activated carbon filtration process for organic micropollutants removal from wastewater

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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Electrochemical arsenite oxidation for drinking water treatment: Mechanisms, by-product formation and energy consumption

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 ₂/IrO ₂ MMO Ti anode electrode, fed with synthetic and natural groundwater containing As(III)...

journal article 2024

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Environmental risk assessment related to using resource recovery‑based bio‑composite materials in the aquatic environment with new laboratory leaching test data

Nativio, A. (author), Jovanovic, O. (author), van der Hoek, J.P. (author), Kapelan, Z. (author)

The concept of circular economy, aiming at increasing the sustainability of products and services in the water and other sectors, is gaining momentum worldwide. Driven by this concept, novel bio-composite materials produced by recovering resources from different parts of the water cycle are now manufactured in The Netherlands. The new materials...

journal article 2024

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Recovery of microbial biomass and purification performance after scraping of full-scale slow sand filters

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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Introducing a new method to assess the benefits of resources recovered from wastewater to the natural environment

Bhambhani, A. (author), Jovanovic, O. (author), van Nieuwenhuijzen, Arjen (author), van der Hoek, J.P. (author), Kapelan, Z. (author)

Resources recovery can improve the economic efficiency and reduce the negative environmental impacts of municipal wastewater treatment plants (MWWTP). The recovered resources can also actively benefit the natural environment enabling a reciprocal relationship between human society and nature. Focusing on these benefits can reveal new resources...

journal article 2024

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Maximizing wind farm power output with the helix approach: Experimental validation and wake analysis using tomographic particle image velocimetry

van der Hoek, D.C. (author), Van den Abbeele, B.H.L. (author), Ferreira, Carlos (author), van Wingerden, J.W. (author)

Wind farm control can play a key role in reducing the negative impact of wakes on wind turbine power production. The helix approach is a recent innovation in the field of wind farm control, which employs individual blade pitch control to induce a helical velocity profile in a wind turbine wake. This forced meandering of the wake has turned...

journal article 2024

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Appearance of Recalcitrant Dissolved Black Carbon and Dissolved Organic Sulfur in River Waters Following Wildfire Events

Xu, Yanghui (author), Wang, Xintu (author), Ou, Q. (author), Zhou, Zhongbo (author), van der Hoek, J.P. (author), Liu, G. (author)

Increasing wildfire frequency, a consequence of global climate change, releases incomplete combustion byproducts such as aquatic pyrogenic dissolved organic matter (DOM) and black carbon (DBC) into waters, posing a threat to water security. In August 2022, a series of severe wildfires occurred in Chongqing, China. Samples from seven locations...

journal article 2024

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Human health risk assessment framework for new water resource recovery-based bio-composite materials

Nativio, A. (author), Jovanovic, O. (author), Kapelan, Z. (author), van der Hoek, J.P. (author)

A new type of bio-composite material is being produced from water-recovered resources such as cellulose fibres from wastewater, calcite from the drinking water softening process, and grass and reed from waterboard sites. These raw materials may be contaminated with pathogens and chemicals such as Escherichia coli, heavy metals, and resin...

journal article 2024

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Service-lines as major contributor to water quality deterioration at customer ends

Fang, Jiaxing (author), Dai, Zihan (author), Li, Xiaoming (author), van der Hoek, J.P. (author), Savić, Dragan (author), Medema, G.J. (author), van der Meer, Walter (author), Liu, G. (author)

Biofilm detachment contributes to water quality deterioration. However, the contributions of biofilm detachment from different pipes have not been quantified or compared. Following the introduction of partial reverse osmosis (RO) in drinking water production, this study analyzed particles at customers’ ends and tracked their origins to water...

journal article 2023

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Resource and Waste Engineering at water utility Waternet

van der Hoek, J.P. (author)

journal article 2023

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Verwijdering van organische microverontreinigingen uit huishoudelijk afvalwater met AdOx

van der Hoek, J.P. (author), Fausta, N. (author), Fu, Mingyan (author), Heijman, Sebastiaan (author), Rietveld, L.C. (author)

Verwijdering van organische microverontreinigingen uit huishoudelijk afvalwater, waaronder medicijnresten, staat sterk in de belangstelling om de oppervlaktewater kwaliteit te verbeteren, de drinkwaterbronnen te beschermen en te voldoen aan toekomstige EU richtlijnen. In minder dan vijf jaar is AdOx, een technologie waarin adsorptie en oxidatie...

journal article 2023

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Modal analysis of an operational offshore wind turbine using enhanced Kalman filter-based subspace identification

van Vondelen, A.A.W. (author), Iliopoulos, Alexandros (author), Navalkar, S.T. (author), van der Hoek, D.C. (author), van Wingerden, J.W. (author)

Operational modal analysis (OMA) is an essential tool for understanding the structural dynamics of offshore wind turbines (OWTs). However, the classical OMA algorithms require the excitation of the structure to be stationary white noise, which is often not the case for operational OWTs due to the presence of periodic excitation caused by...

journal article 2023

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The contribution of deeper layers in slow sand filters to pathogens removal

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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Effects of phosphate addition on the removal of disinfection by-product formation potentials by biological activated carbon filtration

Wang, Feifei (author), Hua, Yulin (author), Pan, Jiazheng (author), Zhou, Jie (author), Hea, Chiquan (author), Hofman, J.A.M.H. (author), Chu, Wenhai (author), van der Hoek, J.P. (author)

In drinking water treatment plants (DWTPs), the widely used biological activated carbon filters (BACFs), as the last barrier before disinfection, can remove dissolved organic matter (DOM) known as precursors of disinfection by-products (DBPs). Whether phosphate addition can improve water purification and DBP control of BACFs is still...

journal article 2023

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Free-vortex models for wind turbine wakes under yaw misalignment: a validation study on far-wake effects

van den Broek, M.J. (author), De Tavernier, D. (author), Hulsman, Paul (author), van der Hoek, D.C. (author), Sanderse, Benjamin (author), van Wingerden, J.W. (author)

Near-wake effects of wind turbine models using the free-vortex wake have been studied extensively, but there is a lack of validation for such predictions in the mid to far wake. This paper presents a novel validation study using three free-vortex wake models of increasing complexity: an actuator disc, an actuator disc with rotation, and a...

journal article 2023

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Photoelectrocatalytic based simultaneous removal of multiple organic micro-pollutants by using a visible light driven BiVO4 photoanode

Ali, A.Z. (author), Jagannathan, Sadhna (author), Bennani, Yasmina-Doekhi (author), van der Hoek, J.P. (author), Spanjers, H. (author)

In this research, photoelectrocatalytic (PEC) based advanced oxidation process (AOP) was studied for the removal of multiple OMPs through an oxidative mechanism. This study investigated the application of a BiVO4 photoanode in simultaneous removal of three selected OMPs: acetaminophen (ACT), benzotriazole (BTA) and propranolol (PRO). This study...

journal article 2023

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Vergaande verwijdering van nutriënten, microverontreinigingen en zwevende stof metO3-STEP

Spit, Tiza (author), Luimstra, Veerle (author), van der Hoek, J.P. (author), Morgenschweis, Christa (author), Bechger, Manon (author), van den Eijnde, Tuur (author)

Het O3-STEP-filter is een innovatieve technologie die waterschappen kan helpen om, kosteneffectief en duurzaam, aan toekomstige EU-richtlijnen voor stedelijk afvalwater te voldoen. Hierbij is een extra ozonisatiestap toegevoegd aan het bewezen effectieve denitrificerende actiefkoolfilter met coagulantdosering (1-STEP®-filter). Hierdoor worden...

journal article 2023

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Direct discharge of sewage to natural water through illicitly connected urban stormwater systems: An overlooked source of dissolved organic matter

Zhang, Ruihua (author), Xiao, Rong (author), Wang, Feifei (author), Chu, Wenhai (author), Hu, Jinglong (author), Zhang, Yu (author), Jin, Wei (author), van der Hoek, J.P. (author), Xu, Zuxin (author)

The illicit connection of sewage pipes to stormwater pipes commonly occurs in urban stormwater systems. This brings problems that sewage might be directly discharges into natural water and even drinking water sources without treatment, posing risks to ecological safety. Sewage contains various unknown dissolved organic matter (DOM), which could...

journal article 2023

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A new approach to circularity assessment for a sustainable water sector: Accounting for environmental functional flows and losses

Bhambhani, A. (author), Kapelan, Z. (author), van der Hoek, J.P. (author)

Resource recovery solutions can reduce the water sector's resource use intensity. With many such solutions being proposed, an assessment method for effective decision-making is needed. The water sector predominantly deals with biogeochemical resources (e.g., nitrogen) that are different from technical resources (e.g., industrial coagulants)...

journal article 2023