Recovery of Stored Aerobic Granular Sludge and Its Contaminants Removal Efficiency under Different Operation Conditions

Table 2

Effluent characteristics and contaminants removal under different operation conditions.

Effluent
		COD; (mg/L)	NH4^+-N; (mg/L)	NO2^−-N; (mg/L)	NO3^−-N; (mg/L)	PO4^3−-P; (mg/L)	COD^a; (%)	NH4^+-N^b (%)	PO4^3−-P^c; (%)
OLR (g/L·d)	2	56.0±5.2	4.4±0.3	13.3±0.2	—	8.0±0.4	89.2	89.3	52.5
	4	73.8±6.9	4.4±0.3	3.1±0.2	—	3.3±0.3	89.4	90.5	80.7
	8	107.8±8.9	7.6±0.4	3.5±0.1	0.5±0.3	4.1±0.4	90.5	81.3	75.9
	16	120.0 ± 10.3	9.2±0.4	4.2±0.2	—	5.2±0.3	94.4	77.0	68.9
C/N	100 : 5	63.0±6.4	10.1±0.3	1.8±0.1	3.3±0.1	4.7±0.2	87.9	62.4	71.3
	100 : 10	58.0±6.1	3.7±0.2	1.9±0.1	3.1±0.1	4.5±0.2	88.2	89.1	72.7
	100 : 20	57.5±6.5	7.7±0.3	2.9±0.1	7.5±0.5	5.8±0.3	89.6	77.4	64.6

a: COD removal; b: NH₄⁺-N removal; c: PO₄³⁻-P removal; —: not detected.