One of the major challenges worldwide is access to valuable metals and minerals to produce products like smartphones and computer chips. However, those materials are present in seawater and wastewater streams. Membrane crystallization is a cutting-edge technology with the potential to recover those materials. In this project, novel hybrid ceramic membranes for membrane crystallization will be developed. The effect of the membrane roughness varied via in-situ growth of hierarchical micro‐nano structures, and hydrophobization will be examined. Finally, extensive membrane crystallization tests with model mixtures of industrial waste streams will be performed to demonstrate the quality of the newly developed membranes.