Granulation as the Salvation? Demonstration-scale Testing to Reduce the Cost of IPR

The NUA and Garver completed a comprehensive evaluation that assessed various alternatives including Lake augmentation from out-of-basin surface water supplies, groundwater wellfield expansion, stormwater diversion, and others. Ultimately, the evaluation pointed to water reuse as the most feasible solution for the City’s long-term water supply needs. The City then developed a phased plan for the study, piloting, and eventual permitting of a new potable reuse program. The eventual potable reuse program would be constructed to augment the Lake. Multiple trains of enhanced biological nutrient removal (BNR) were operated continuously from June of 2021 to June of 2022. Both the modified University of Cape Town and Aerobic Granular Sludge approaches were tested for capabilities to achieve low total-P and total-N effluents which could meet stringent requirements for IPR in OK.