aerobic granular sludge sequencing
This study demonstrates a calcium-enhanced aerobic granular sludge (AGS) strategy to achieve ultra-high simultaneous nitritation, denitritation, and phosphorus removal (SNDPR) from high-strength digestate centrate under severe carbon limitation. In a long-term (320 d) operation, an AGS reactor successfully treated centrate containing ~950 mg/L ammonia and 150 mg/L P at an extremely low C/N ratio of 0.2.