Start-Up and Aeration Strategies for a Completely Autotrophic Nitrogen Removal Process in an SBR

Table 1

Operating parameters of each phase in SBR.

Parameters	Phase A	Phase B
Time range (d)	0~50	51~140
Hydraulic retention time (h)	16	24 (51~123 days),; 16 (124~140 days)
Aeration mode	Continuous	Intermittent (2 h aeration : 2 h no aeration : 2 h aeration : 1.5 h no aeration)
DO concentration during aeration phase	1~2 mg/L (1~11 days), 0.16~0.18 mg/L (12~51 days)	0.04~0.15 mg/L (aeration time), 0 mg/L (no aeration time)
Intermittent aeration (R)	—	1/1 (except the last nonaeration duration)