Effects of settling time on the flocculation progress and treatment performance in the co-culture of microalgae-activated sludge photobioreactor

The application of microalgae-based wastewater treatment systems using as a source nutrients has been success-fully developed in recent years and brought about positive results microalgal biomass recovery while producing valuable products. This study presents the microalgae activated sludge (AS) co-culture low agitation photobioreactor (aPBR), which could reduce energy usage. In addition, demonstrate role settling time on flocculation progress performance. average Chemical Oxygen Demand (COD) removal was up to 76.1% achieved PBR system with speed 80 rpm. Moreover, high growth observed be coupled nutrient removal. After 63 days operation, heavy flocs excel-lent ability were dominant photobioreactor. would preliminary step for algae granulation system.