Aron Aksan

Scientific researcher

030-6069745
aron.aksan@kwrwater.nl
06-27391459

WaterpatRoon: non-target screening naar routine toepassing

Non-target screening is nu al een krachtige techniek waarmee tot wel duizenden bekende en onbekende stoffen in een watermonster gemeten worden, maar de betrouwbaarheid van de identificatie van…

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Decision-making under deep uncertainty in the drinking water sector – exploring (DAPP) Multirisk Pathways as a methodology

Climate change, technological developments, and population growth are examples of sources of deep uncertainty that can have a significant impact on the drinking water sector. The Dynamic Adaptive…

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Protecting Drinking Water Under Different Regulations

Despite advancements in water treatment methods, pervasive water pollution and discussions about alternative sources of drinking water are eliciting stronger regulatory action and pressing the drinking water sector…

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Justice as a pillar for the water sector

In 2023, the Netherlands Scientific Council for Government Policy (WRR) advocated that justice, along with efficiency and legality, should also constitute an important pillar of climate policy and the related ongoing transitions.…

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Role Performance and Stakeholder Strategies

A utility that does not behave as expected may create unclear situations or even lose credibility. It is therefore essential to examine how role performance is shaped in stakeholder processes and which…

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CIRSEAU – Building a water-smart economy and society

In a water-smart society, all available water resources—including surface water, groundwater, wastewater, and process water—are managed to prevent water scarcity and pollution, increase resilience to climate change, mitigate…

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WATERVERSE

Data spaces are protected environments where participants can access, process and use data, amongst other things. With a focus on water data spaces, the EU-funded Waterverse project aims to develop a water data management ecosystem that will…

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NATALIE

NATALIE addresses the risks posed by climate change and its impacts and proposes to advance the concepts of “ecosystem-based adaptation” in Europe combined with climate resilient development pathways. With the means for impact driven Nature-Based Solutions (NBS),…

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The FRESHMAN-project

Drinking water companies worldwide have freshwater supply problems. The main freshwater source for the Dutch water utility company Dunea is the Maas River, together with the Lek. However, due to extreme drought and intrusion of salty water…

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Getting to grips with indirect discharges

Water authorities, environmental services and municipal authorities are increasingly seeing discharges of large quantities of chemical waste and other undesirable substances into the drains and therefore indirectly to surface water. That results…

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Flexibility in water

This project addresses the question of how, and in which conditions, water utilities can use the flexibility in the management of their assets to be better placed in a changing energy system. That is important for several…

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Water & Energy network group

Global efforts to cut greenhouse gas emissions include switching to cleaner and more sustainable energy sources. Water plays an essential role in this energy transition. In addition, drinking water utilities can contribute to the energy transition with…

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Investigating the options for low-temperature hot tap water in non-residential buildings

Low-temperature (LT) collective hot tapwater systems have a range of advantages over conventional higher-temperature systems. Legionella safety for hot tap water does represent a significant challenge here. Advantages…

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Pesticides in Dutch drinking water sources

By 2027, the Netherlands must comply with the Water Framework Directive (WFD) and the chemical quality of all designated groundwater and surface waters must be good. The latest WFD evaluation has shown…

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HPLC-UV screening project

HPLC-UV (high performance liquid chromatography with ultraviolet detection) has been used for over fifteen years by Rijkswaterstaat and Aqualab Zuid to monitor surface water quality. It is a robust, relatively simple technique for the early detection of…

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MOMENTUM – Study of the effects of micro- en nanoplastics on health

Micro- and nanoplastic particles (MNPs) have, as a result of plastic use and pollution, been found everywhere, both in the environment and in the human body. The Netherlands…

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PyHarmony: Development and harmonization of pyrolysis GC-MS methods for the identification and quantification of micro- and nanoplastics

Micro- and nanoplastics (MNP) are a health and environmental concern but little is known about the extent of the problem. Current analytical techniques are unable to reliably quantify…

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IDEATION – Inland Waters in the Digital Twin Ocean

The European IDEATION project will deliver a comprehensive roadmap to the European Commission, including a reference architecture, use cases, and recommendations for designing a Digital Twin for Inland…

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Green energy for all: how hydrogen and electricity carry our future

In their book, Groene energie voor iedereen. Hoe waterstof en elektriciteit onze toekomst dragen, which is also published in English as Green energy for all. How hydrogen and…

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Aarhus ReWater

The municipality of Aarhus (Denmark), because its population is growing annually by 5000 people, faces the challenge of both creating a cleaner harbour and bay and increasing the capacity of wastewater treatment plants. The current wastewater treatment…

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Transformative Area-oriented Management

The drinking water sector is facing major challenges. Climate change, developments in society and institutional changes are forcing water utilities to seek more collaboration and coordination with other stakeholders so that they…

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RECREATE

Eleven European partners will be working together on using alternative sources and additional buffers to strengthen the resilience of water supplies to water scarcity. KWR is leading a work package with four varied regional case studies: in…

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PCR methods for legal parameters

In determining the (hygienic) quality of drinking water, use is made of E. coli, intestinal enterococci and bacteria from the coli group (coliforms) as indicator organisms. Culture methods are the standard technique used to establish the presence…

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Wiser with Metal

This practical study investigates how much aquafer can be reprocessed into iron powder of a known quality. If pure enough, the iron powder can be used for a range of high-grade applications, including as a carrier material…

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Rewarding: closing water and nitrate cycles in greenhouse horticulture

The greenhouse horticulture sector in the Netherlands is working on circular food production. On the road to achieving this goal, the sector must focus on, among other things,…

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An absolute barrier to PFAS in RO concentrate – no PFAS discharge to the environment in the drinking water sector (PAH PFAS)

An inventory study (KWR 2021.040) has shown that drinking water utilities find PFAS in their sources. PFAS are removed effectively during treatment with reverse osmosis (RO) but this…

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Value Case Development: a process methodology for sustainable decision-making

Drinking water utilities will have to make major investments in the coming decades in areas such as asset infrastructure in order to maintain their capacity to continue supplying…

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Closing the Cycle of Nutrients from Wastewater and Process Water (KNAP)

In this cross-sectoral project within TKI Water Technology and TKI Agri & Food, research partners WUR/WENR, KWR and LeAF are working together with a wide range of public-…

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Waterrotonde Eerbeek

A pilot project has been organised with a circular water management system at the Industriewater Eerbeek (IWE) site. Existing plants treat process water from paper and cardboard mills and recover residual products for use in agriculture. The…

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Monitoring, modelling and reducing nitrous oxide emissions from WWTPs

Towards mitigation strategies for WWTPs through intensive monitoring and modelling of N2O emissions Industry and society are striving to reduce the carbon footprint in response to tackling climate…

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Roadmap for Next-Generation Sequencing (NGS) to monitor microbial drinking water quality

The Next-Generation Sequencing (NGS) analysis method is suitable for investigating the composition of complex microbial populations. NGS is very valuable for identifying changes in the composition of microbial…

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From non-target screening to risk assessment

Non-target screening, bioassays and computer modelling can provide information about the structure, concentration and toxicity of unknown substances in water. Until now, these chemical, biological and computing methods have often been used…

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Towards a knowledge programme for PVC pipe systems

We are researching how drinking water utilities can collect sufficient information about their PVC pipe systems in the years ahead, with a view to further improving the management of existing and yet-to-be-installed…

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Determining reliability of modelling of drinking water warming

Water utilities want to know at which locations in the distribution network, and during which periods, risks of excessively warm drinking water may occur, and what targeted measures…

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Methods for decision-making under deep uncertainty

Progressing climate change, technological developments and population growth put our society and also the water sector in a situation of deep uncertainty. Deep uncertainty is a technical term for the unpredictability of…

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Digital twin as experience accelerator

In which situations can a digital twin of the distribution process play a valuable role in the training of new staff? This is the central question in the project entitled: ‘On the…

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System Knowledge and Water-Energy-Food-Ecosystem Nexus

Land, food, energy, water and ecosystems are linked to each other (the WEFE nexus), and form interconnected socio-metabolisms at different scales. Within Public Design for Water, we work in…

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The ‘Integrated Area Plan’: designing and assessing integrated solutions in area processes

This project is exploring how professionals working in practice can arrive at well-considered ‘Integrated Area Plans’. An Integrated Area Plan focuses on multiple and integrated solutions for various…

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Effect of temperature on the growth of opportunistic pathogens

This project is investigating how the heating up of drinking water affects the growth of opportunistic pathogens in the mains system. We are using a pilot array that…

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The effects on biological stability and later growth of mixing treated water from alternative sources and conventionally produced drinking water

This project will determine the effect of mixing drinking water extracted from new sources (groundwater and surface water) with drinking water from conventional treatment on the biological stability…

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Sewage surveillance of drug use

Drug use is a recognised societal problem. It is damaging to public health and has negative (undermining) consequences for public security and the environment. An effective drug policy needs to be founded on reliable drug-use and -dealing…

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Reliable detection and control of Legionella pneumophila in wastewater

In recent years, the number of registered patients with a Legionella infection has increased in the Netherlands, with the majority of infections caused by Legionella pneumophila. L. pneumophila…

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Customer Perspectives and Behavioural Research

In the transition to a more water-aware society, it is essential to listen to and fully understand drinking water customers. How do these customers view drinking water and water conservation? What do…

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Social Environment and Area Planning Processes

We live in a time of transitions and changes, both in organisations and in the physical environment. We have ambitions in the area of climate adaptation, the water transition, the energy transition…

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Futures Studies and Strategy Development

For the timely recognition of threats and opportunities, and, as a society, to react to them effectively, we need to explore the future. Within Public Design for Water, the Futures Studies and…

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Water-kennis: an immersive media experience

Turn on your tap, shower or flush your toilet, and clean water flows out. But where does this water come from? The availability of enough clean water has become an issue for…

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Monitoring nutrient measures

In many areas of the Netherlands the surface-water quality still does not meet the WFD targets. In the present project two catchment areas in the provinces of North Brabant and Flevoland are being intensively monitored for nutrients,…

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GRROW: an intergenerational lab for the drinking water sector

What does the future water sector look like? What needs to change and what do we want to maintain? The GRROW lab project wants to answer that question…

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Customer Perspectives 2.0

In the Joint Research Programme (BTO) Customer theme group, four customer perspectives were developed which provide insight into the diversity of drinking water customers, with their different expectations, desires, concerns and needs. In 2018, the distribution and…

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Can’t escape the WaterScape: transforming water and governance systems for dealing with climate impacts in the Dutch Delta

With projected increase in floods and drought it is apparent that the Dutch water system needs to change. In WaterScape we explore large-scale spatial transitions in the physical…

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AMVD Reference Document revision

Dutch drinking water utilities need to demonstrate that drinking water is safe and does not spread any infectious diseases. To this end, they establish for each drinking water treatment process an Analysis of Microbial Safety of Drinking…

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Socio-technological legitimisation of water-related reuse

Institutional trust and legal and regulatory frameworks can contribute to the socio-technological legitimisation of new technologies for water-related reuse. In this study, twelve legitimisation strategies were identified (see…

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BTO/WiCE 2024-2029: current and urgent

The Onderzoeksvisie Gezamenlijk Wateronderzoek voor 2024-2029 voor BTO/WiCE (BTO/WiCE Research Vision of the Collective Water Research for 2024-2029) presents a varied and current programme with innovation, valuable knowledge development and a focus…

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Accelerate Energy Transition with Aquathermia 2.0

In its National Climate Agreement, the Dutch government has made commitments to reducing the emission of CO2. One of the sectors referred to in the agreement is the built environment. Heat demand…

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Effect of temperature on the growth of opportunistic pathogens

In this study we investigate how the increase in the temperature of drinking water influences the growth of particular pathogens, known as opportunistic pathogens, in the drinking water…

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Alternative Drinking Water Sources

Safeguarding microbial safety in the use of alternative drinking water sources is an important subject of concern for the future. For this reason, drinking water utilities are researching the potential of new…

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The Ultimate Water Plant

The Ultimate Water Plant is a collaborative project involving parties in the water sector who want to demonstrate how, and subject to which conditions, treated sewage can be made available as a supplementary source of drinking water.…

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ProVe IT-LT: Proven Safe and Innovative Hot Tap Water at Low Temperature

A low temperature (LT; 50 °C) in heating networks offers various advantages, such as reduced heat loss during heat distribution. Moreover, a low supply temperature is also increasingly…

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Longitudinal customer research

Longitudinal customer research can help drinking water utilities better tailor their services to their customers. To enable the best possible design of these studies, an ‘ideal’ questionnaire has been developed, as a part of a larger whole.…

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The customer as tourist

For the drinking water utilities customers are not only drinking water consumers. As tourists they also use the nature areas that these organisations manage. What is the perception of the customer as tourists? And to what extent…

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The role of sludge in infiltration ponds in OMP removal during dune infiltration

Drinking water utilities that use dune infiltration or riverbank filtration employ infiltration ponds with a sludge layer. This project investigates the role played by the thickness and conditions…

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ANCHOR: broad knowledge development about urban water reuse

In this project, we will study the application of water reuse in the built environment from technical, societal, governance and economic perspectives. The goal is to establish a…

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Biological treatment of RO concentrate

Reverse osmosis (RO) is a water treatment technique that involves the use of semi-permeable membranes to remove unwanted molecules and particles. It is an effective way of extracting a wide variety of…

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Risk of L. pneumophila with heating networks

In this project, a qualitative microbiological risk analysis is being conducted to determine the effect of using heating networks for domestic connections on the number of patients with L. pneumophila. In addition, we…

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VIPNL: Wetland crops on water-rich peat

This project is investigating how wetland agriculture on water-rich peat can help to reduce greenhouse gas emissions and land subsidence, and deliver improvements in water quality and biodiversity. The focus is on…

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TUBES as a controlled test environment for low-threshold pilot projects

In this project, we are investigating the possibilities and limitations of distributed-optical-fibre detection techniques in a controlled test environment. This projectis being organised in a broad alliance of…

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Lead from brass components – phase III

This project examines the Dutch drinking water sector’s sampling protocol to control lead concentrations at the tap. With a tightening of the lead standard, the performance of this protocol needs to be…

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Insight into connecting pipes

There is still not enough attention being paid to connecting pipes in the transport and distribution network of the Dutch water utilities and De Watergroep in Flanders. Our understanding of the condition, failure probability and residual lifespan…

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Impact of internal factors on malfunctions

Can malfunctions and/or repair work and pump operations lead to new malfunctions in the mains? This project will investigate this question by determining whether there is a statistical relationship between these factors…

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Quantitative added value of digital water meters and other sensors at customer locations

What are the benefits for the distribution process of different versions of smart water meters and the additional sensors? In this project, quantitative descriptions and model studies will…

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Improving the reliability and practicality of an AI-based tool for data validation and correction

Water companies are increasingly using sensor data for advanced process monitoring and control for key variables. They are therefore increasingly reliant on high-quality data. In this project, the…

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Reduction of pressure on groundwater through reuse of water from dairy plants in agriculture

Groundwater in the Netherlands is under pressure, both in terms of quantity and quality. Groundwater is used in several activities, including drinking water production, agriculture and industry. In…

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Digital water – building a conceptual cost-benefit framework based on the experiences of frontrunners

Several water companies at home and abroad have taken far-reaching steps in digitising their operations. In this project, we deepen our understanding of the drivers of frontrunners for…

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Evaluation of Aeromonas legal standard

Since the 1980s Aeromonas in drinking water has been included as a microbiological parameter in the Dutch Drinking Water Decree. Currently, Aeromonas standard exceedances are generally tolerated, partly because it is unclear…

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Biomonitoring of atmospheric nitrogen deposition with mosses

It was expected that the emission of nitrogen during the COVID-19 crisis and the lockdowns would diminish because of the sharp reduction in human activities. This would apply…

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Automatic water-quality control for good recirculation water in greenhouse horticulture

Greenhouse horticulture irrigation water, when recirculated, acquires a complex composition. The impact this has on crops is for the most part unknown. The possibility of determining whether the…

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Biological stability parameters in operational practice

New methods for determining and predicting biological stability developed since 2010 are applied less often in daily drinking water practice than are the previously existing older methods. This,…

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Fast alternative for the heterotrophic plate count at 22°C (HPC22) following interventions in the drinking water distribution system

This project will determine which method is suitable for the detection of anomalies in the microbial water quality following maintenance activities or pipe breaks in the drinking water…

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PUSH-IT: demonstration and development of seasonal underground heat storage systems

The EU aims to become carbon neutral by 2050. Large-scale seasonal underground heat storage has an important part to play in meeting this objective, because heating and cooling…

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Solar panels on water reservoirs

Drinking water reservoirs have a large water surface. The installation of floating solar panels on reservoirs can be an effective strategy to generate energy. However, the question is, if and what impacts do solar panels have on…

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Power-to-X Province of Utrecht

The Dutch energy system has to be clean and future-resilient in the future, but also reliable and affordable. The local production of renewable solar or wind energy plays a crucial role in this transition. The Power-to-X approach…

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Water Quality Knowledge Impulse

Over the past four years, work in the Water Quality Knowledge Impulse has focused on learning more about the quality of groundwater and surface water, and the factors that affect that quality. The aim of the Water…

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PARC: European partnership for the assessment of risks from chemicals

The EU-wide research and innovation programme PARC was established in order to improve the risk assessment and sustainability of chemicals. The PARC project will strengthen the scientific basis…

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Chances for Concentrate

In this project, we are investigating how the circular processing of concentrated residual streams can contribute to future-resilient and socially responsible freshwater supplies. This involves recovering water and producing raw materials for which there is a market.…

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Implementation of screening and NTS methods in practice

Drinking water laboratories have recently expressed a need for the further integration of screening methods, including non-target screening (NTS), in the methods used to monitor water quality. Technological…

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Environmental forensics: pollution signatures

The presence of anthropogenic substances in the drinking water chain poses challenges for the water sector, and specifically for drinking water companies. That presence is undesirable, and sometimes even problematic. Although treatment…

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Big data – analysis and integration of chemical and toxicological data

Monitoring the water quality of drinking water is challenging due to the presence of complex mixtures of mostly unknown substances that vary in concentration and composition. Over the…

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Effect-based monitoring of water quality in the circular economy

Freshwater from groundwater or surface water sources is becoming scarce in dry periods, driving a rise in interest in the use/re-use of rainwater and treated domestic and industrial…

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Drugs production waste in groundwater: field research and action perspectives

Little is still known about the impact of the long-term or extensive discharge of chemical waste from the production of synthetic drugs (SYNDRU) on groundwater quality and therefore…

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Toxicology on Target

The domain of toxicological risk assessment is constantly evolving and it is essential to follow these developments closely. It has been noted that an adequate response to water quality issues requires the ongoing development of knowledge and…

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Microplastics in water treatment

Plastics are a ubiquitous part of everyday life and they are found in fresh water throughout the Netherlands. In this project, we describe the nature and levels of microplastics (20 - 500 µm) at different stages of…

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Text mining for the early detection of relevant water pollutants

Long before substances are included in regulations and monitoring programmes, text sources such as reports, social media, press releases, regulatory agency websites or the scientific literature can provide…

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Are PMOCs less toxic?

Persistent mobile organic compounds (PMOC) accumulate in the water cycle and are hardly removed during water treatment. For a long time, these substances have been under-researched but recent studies show that they are present in worrying concentrations.…

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Nanoplastics in drinking water

It is becoming increasingly clear that plastic is everywhere. That has been demonstrated in numerous environmental compartments, including soil, sediment, surface water and air. Data about the presence of microplastic particles in surface water are sparse, and…

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Water-soluble polymers – Eyes and ears for Chemical Safety 2019-2020

Water-soluble polymers are often neglected because they are not covered by the definition of microplastics and are not visible. As a result, very little is still known about…

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VO Eyes and ears for Chemical Safety 2019-2020 (LDIR and biofilm)

The regrowth and biofilm formation of micro-organisms on pipe material and membranes lead to problems in drinking water systems. To combat biofilm formation, a knowledge of the dynamics…

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Clearer picture of the formation of transformation products during drinking water treatment thanks to integrated strategies

During drinking water production, biotic and antibiotic processes can form transformation products (TP) from organic micropollutants (OMP). How these substances behave in water treatment and how toxic they…

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Improved prioritisation and fragmentation improve the identification of unknown substances with non-target screening

Non-target screening (NTS) is based on the combination of liquid chromatography in conjunction with high-resolution mass spectrometry (HRMS). In addition, tailored data analysis, with target and suspect screening,…

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Contribution to Toxicology Knowledge Impulse

We are making and using more and more substances in larger and larger quantities. Analyses by collaborating European ecologists and ecotoxicologists have shown that exposure to mixtures of chemicals is a limiting…

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Survey of drug waste emission pathways and relevance for the drinking water sector

The Netherlands has a thriving illegal industry for the production of synthetic drugs such as amphetamine (speed), MDMA (XTC) and “designer drugs”. It releases all kinds of waste…

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Publications

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News

Blog

AquaNL Trade Fair: Day 3

27 March 2025 — On the last day of the AquaNL trade fair, several presentations were again scheduled. Below, Nienke Koeman-Stein and…

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Blog

AquaNL Trade Fair: Day 2

27 March 2025 — On Wednesday 19 March, the themes of ‘water purification & circularity’ took centre stage at the AquaNL trade…

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Blog

AquaNL Trade Fair: Day 1

27 March 2025 — Researchers Tessa Pronk, Stefan Kools and Roberta Hofman shared their insights about the projects ‘Substances on the radar’…

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Blog

Reflections from AquaTech 2025

25 March 2025 — From March 11-14, KWR researchers have attended AquaTech Amsterdam, one of the world's leading exhibitions for process, drinking…

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News

Water under pressure: Roberta Hofman at the Water Gala

21 March 2025 — The Water Gala, an event organised by New Scientist and the HU University of Applied Sciences in Utrecht,…

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News

Focus on tackling water challenges and educating young water professionals

10 March 2025 — Hogeschool Utrecht en KWR hebben een samenwerkingsovereenkomst getekend voor de aanstelling van een bijzonder lector op het gebied…

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News

Developing knowledge on practical scale to solve PFAS problem

18 February 2025 — Initial results from the PFAS Living Lab project are promising. For example, leaching of PFAS with soap works…

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News

“It is possible: a healthy groundwater system as water buffer and water source”

14 February 2025 — ''Since 1 July 2024, Ruud Bartholomeus has been extraordinary professor of Plant Water Stress and Regional Water Management…

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News

What we know about PFAS: the current situation

12 February 2025 — Experts in water quality and water treatment talk about how KWR supports the water sector in developing knowledge…

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Blog

Celebrating Women in Science: Reflections from KWR Researchers

11 February 2025 — On the International Day of Women and Girls in Science, we take a moment to celebrate the contributions…

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News

Waterwijs Symposium on Chemical Risk Assessment

07 February 2025 — Could risk principles from other domains, such as food safety, offer valuable insights for the drinking water sector? …

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News

KWR goes to AquaNL 2025

23 January 2025 — KWR will be present again at AquaNL in Gorinchem on 18 - 20 March. Experts and organisations from…

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News

How do you hold on to your ambitions in sustainability initiatives?

17 December 2024 — The ANCHOR project began with interviews in the sustainable housing project De Nieuwe Dokken (in Ghent, Belgium). The…

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Blog

Workshop TU Delft and KWR: Water and Soil as Guiding Principles in the Water Sector

17 December 2024 — To celebrate the collaboration between KWR and TU Delft and explore future research opportunities, a workshop on the…

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News

Intergenerational collaboration for the future of water systems

17 December 2024 — How can young professionals and experienced experts collaborate on innovative solutions for challenges such as climate change? At…

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News

Mariëlle van der Zouwen new director of KWH

12 December 2024 — Dr. Mariëlle van der Zouwen (52) is appointed managing director of KWH, the holding company of KWR Water…

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News

CAPTURE and KWR Collaborate for Sustainable Water Solutions

12 December 2024 — KWR has established a strategic partnership with CAPTURE, an innovative platform based in Belgium that brings together academic…

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Model-based decision-making under deep uncertainty

27 November 2024 — In this Hydroinformatics knowledge exchange, it was discussed what uncertainty means conceptually, from simple stochastic to deep uncertainty.…

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