Inge has extensive experiences from resource efficiency and waste related matters. His focus is on the residual fractions being used for energy recovery and the residues (ashes) generated from the energy recovery. A lot of the questions Inge works with relates to the future role of energy recovery in a circular economy and how to avoid sending fractions that could be recycled to energy recovery. Challenges around recovering resources from ashes or the potential utilisation of ashes as secondary raw materials are other hot topics Inge is working on. Inge is convenor of ISO TC300 WG2 dealing with standardisation around solid recovered fuels (SRF). He is also actively leading the IEA Bioenergy Task 36 – Material and energy valorisation of waste in a circular economy. In addition Inge also manages the strategic network Waste Refinery.