Linköping University, in collaboration with Ribea AB, has been studying the removal of heavy metals and organic matter from process water. Specifically, the product water from a metal-polishing company in Gamleby had Zn, Cu and particulate levels that were in excess of allowable limits. The objective of the work was to develop a process for removal of these metals and the particulates without the use of chemicals and to design and install an on-site facility for larger-scale tests. Additionally, a further goal was to generalise the findings such that metals and organic matter could be removed from other process waters.