Table 1. Copy numbers of the hzo and 16S rRNA genes of AMX and the 16S rRNA gene of total bacteria in sludge samples of the anammox reactor during the entire operation.

Sludge sample	Gene copy number per liter of mixed liquor (copies L−1)			Copy number ratio (%)
	Bacterial 16S rRNA gene	hzo	AMX (16S rRNA)	hzoto 16S rRNA gene	AMX to 16S rRNA gene
Seed	2.97 ± 0.36 × 1012	9.28 ± 2.27 × 108	8.88 ± 0.16 × 107	0.03	0.003
Day 61	1.28 ± 0.16 × 1012	3.16 ± 0.88 × 109	1.63 ± 0.16 × 108	0.25	0.01
Day 86	1.28 ± 0.04 × 1012	5.39 ± 0.40 × 1010	9.77 ± 3.17 × 1010	4.22	7.64
Day 277	1.34 ± 0.26 × 1012	1.54 ± 0.15 × 1011	1.82 ± 0.05 × 1011	11.46	13.61