Average steady-state phenol, COD and nitrate removal efficiencies as a function of H₂O₂/phenol ratio (inlet phenol concentration = 500 mg L⁻¹, MLSS = 4000 mg L⁻¹, HRT = 12 h, OLR = 1000 g m⁻³ d⁻¹).

PA (attached)b	PA (suspended)b	DHA (attached)b	DHA (suspended)a	Nitrate RE ± SD (%)	COD RE ± SD (%)	Phenol RE ± SD (%)	Nitrate in	H2O2/phenol
7	15	6.01	2.1	50.49 ± 6.76	47.9 ± 1.47	58.4 ± 2.4	1190	0.36
8	14	5.1	1.5	57.66 ± 1.41	44.17 ± 1.9	56.9 ± 3.9	900	0.36
9	17	3.9	0.95	98.3 ± 1.51	33.7 ± 3.72	59.9 ± 8.45	600	0.73
88	49	9.7	5.7	99.86 ± 0.48	43.8 ± 10.74	78.16 ± 8.5	300	1.10
142	94	14.68	9.8	—	75.0 ± 6.12	98.3 ± 3.15	0	1.10
210	—	15.98	—	—	88.59 ± 0.75	100	0	0.73
221	—	16.25	—	—	86.87 ± 0.81	100	0	0.36
289	—	17.89	—	—	88.18 ± 0.78	100	0	0.55

^aDHA is expressed in μg TF per g_biomass per day.

^bPA is expressed in U g_biommass⁻¹.