Rapid method of aerobic granular sludge bioreactor start-up for domestic wastewater treatment

This study presents a rapid method on how to speed up aerobic granular sludge (AGS) cultivation and ensure excellent stable removal performance during bioreactor operation for domestic wastewater treatment. new strategy consists of start-up the using only anaerobic (AnGS) as seed feeding with crude sewage extracted from full-scale Extended Aeration Plant. experiment used 2.5 L lab-scale sequencing batch reactor (SBR). The operated at low dissolved oxygen (DO) concentration controlled value 2.0 mg/L below. After 60 days operation, it clearly showed that almost 90% AnGS seeds turned black color brown. physical characterization analysis average sizes were unchanged, granules remained compact. Also, SBR monitored brown performance. Average efficiencies steady-state cycles room temperature COD, ammoniacal nitrogen, phosphate reached 84%, 92%, 100%, respectively.