Wolter Siegers is a Generic-B researcher and has worked at KWR for more than 30 years. He worked on research in water treatment for drinking water, wastewater and industry water. He is specialized in adsorption, ion exchange, NOM characterization and particle measurements. Another important specialty Wolter has is translating research questions into practical work. In addition, he worked a lot with oxidation, membrane and adsorption processes for the removal of unwanted substances from water and the biological stability of drinking water. He built his expertise by planning, detailing and carrying out many projects in this field. Naturally, most of his work has been documented in publications and research reports as the lead or co-author.