The global food-energy-water nexus encompasses energy efficient recovery and reuse of nutrients. However, limited phosphate sources and pollution from phosphate-rich fertilizers adversely affect global food security, which mandates energy-efficient technologies, like electrochemical struvite (MgNH₄PO₄.6H₂O) production, with nutrient capture and reuse potential. In this study, we report a first-of-its-kind electrochemical struvite precipitation in an electrochemical packed bed reactor filled with pure Mg shots, which achieved shortened retention time and higher phosphate removal efficiency, compared to the previous batch electrochemical system used by our group. Mg loading, equivalent to the weight of the immersed Mg anode in the batch reactor, was fixed in the packed bed reactor at the beginning of each experiment. The feed flow rate (0.5-5 LPM) and Mg shot diameter (0.5-1.5 cm) were varied to study the performance of electrochemical precipitation column in a 10 mM synthetic solution of ammonium dihydrogen phosphate (NH₄H₂PO₄, 10 mM) at neutral pH. The continuous flow system achieved a >40% phosphate removal over 4 h. The experimental results help in understanding the different parameters that affect struvite recovery from a flow-based reactor design, as well as an understanding of the challenges involved in transitioning from a batch reactor to a flow reactor.