Shifts in Nitrification Kinetics and Microbial Community during Bioaugmentation of Activated Sludge with Nitrifiers Enriched on Sludge Reject Water

Table 3

AOB and NOB percentages relative to DAPI in the main stream reactor (%).

	Time (day)	30	38	57	77
	AOB/DAPI	3.7±1.2	7.0±2.2	9.1±3.1	8.7±2.7
Sludge	NOB/DAPI	0.1±0.1	3.4±1.1	5.0±1.7	5.0±2.5
	ΔAOB/ΔNOB	—	0.97	1.1	1.0
Effluent	AOB/DAPI	—	18.2±4.6	11.3±2.8	10.0±3.4
	NOB/DAPI	—	3.9±2.0	3.6±1.5	1.4±1.2