In the last decades, the need for clean surface water and the importance of drinking water have become clear. Specific consequences are the decentralisation of wastewater treatment (e.g. companies cleaning their wastewater before reuse) and the paradigm shift towards nutrient recovery. LIWET (Laboratory for Industrial Water and EcoTechnology) supports this movement through testing technologies on lab-scale, followed by upscaling to make sure these technologies can be implemented on industrial scale.