In this paper, we report on algal-based, photosynthetically oxygenated waste-to-energy recovery (POWER®) system for recovering energy, water, and nutrients from urban wastewaters (UWW) that can be utilized in the food production sector. The POWER® system affords waste treatment, net energy production, and recovery of irrigation-quality water and high-purity crop fertilizers. The strain used in the POWER® system is Galdieria sulphuraria, capable of mixotrophic growth under elevated temperatures of 45 - 55oC and low pH of 2 - 4. The POWER® system provides single-step removal of carbon and nutrients (nitrogen, N and phosphates, P) from UWWs through mixotrophic metabolism. The mixotrophic algal system is capable of incorporating all the C, N, and P in UWW into biomass without any energy input and without any loss of C as CO2 as is the case in the current activated sludge systems. In addition, solar energy captured via photosynthesis is also incorporated into the biomass. The energy-rich biomass is then hydrothermally processed in the POWER® system to yield biocrude and biochar with solubilized N and P in concentrated form as byproducts for recovery and use as fertilizers. This paper includes details of development of the POWER® system and results from a pilot scale study conducted under field conditions at an urban wastewater treatment plant.