Wastewater treatment is essential for protecting water resources, yet conventional biological treatment systems remain costly due to high aeration demands and sludge management. Our project explores an innovative approach using iron mineral biogeobatteries to enable anoxic ammonium (NH4+) removal, phosphorus (P) recovery, and methane (CH4) production. The project involves enriching and co-cultivating Feammox and methanogenic microorganisms, and investigating how magnetite can serve as both an electron acceptor and donor, driving microbial metabolism without the need for external additives. The efficiency of this process in removing NH4+, generating CH4, and recovering P will be assessed through lab experiments, following the designing of a pilot-scale system. The aim of this research is to develop a cost-effective, energy-efficient, and sustainable wastewater treatment system for urban and industrial applications.