The goal of the PCR demonstration project is to contribute to environmental policy and legislation by demonstrating a first full scale application. The PCR project focusses on maximizing recycling and reuse of copper and zinc which would otherwise not be recovered from Waste-to-Energy bottom-ashes and would in most cases end-up at landfills or in civil construction works. During the project first a prototype is built to show the feasibility of the copper and zinc refining. This prototype will be followed by a demonstration in 2 phases. The first phase will focus on zinc leaching followed by a second demonstration where the process is extended to increase capacity and to come to an improved zinc derivative product.