Microalgal technologies can advance the limit of technology for tertiary nutrient recovery at water resource recovery facilities (WRRFs; a.k.a. wastewater treatment plants, WWTPs), while also producing valuable coproducts, such as fertilizers, bioenergy feedstocks, industrial chemicals, and animal feed. Recently, these technologies have attracted attention because of their potential to meet effluent total phosphorus limits as low as 0.03 mg-P•L -1 , 3 well below the current limit of technology for biological phosphorus removal (~0.3 mg-P•L -1 ). Despite the potential of microalgae-based wastewater treatment as an alternative to conventional chemotrophic nutrient removal and/or chemical precipitation, the lack of a reliable and reproducible model to predict and optimize the performance of microalgal nutrient recovery process design has limited the widespread use of this technology.