The department of environment will take part in three work packages of the NuReDrain project. The first work package will focus on the bench scale evaluation of P filter materials. In this work package our department will assist in the establishment and fulfilment of standardized test procedures to evaluate potential P sorbing materials (PSM). This means that PSM will be characterized based on their P sorption isotherms and P sorption kinetics, where after the most interesting PSM will be tested in filters built at lab scale. The second work package will focus on the field scale evaluation of P filters. As the department of environment has been running trials with P filters at field level during the past two years our knowledge and experience will form a strong basis to develop and test P filters in a standardized way. The third work package will focus on phosphorus recovery from the PSM. With its fully equipped lab the department of environment will assist in performing lab trials to estimate P fertilizer value of the P saturated PSM. Moreover, our experience with pot and field trials forms a strong basis to perform P fertilizer tests in a standardized way. Finally, our international contacts allow to continuously gain new information and insights which can be tested/implemented within this project.