Table 1.

Composition of the synthetic wastewater.

	R1	R2	R3
NaCH3COO (mmol L-1)	27.0	12.9	5.6
CH3COOH (mmol L-1)	15.2	7.3	3.1
K2HPO4 (mg L-1)	71.0	35.5	17.8
CaCl2 (mg L-1)	22.1	22.1	22.1
MgSO4 × 7H2O (mg L-1)	24.4	24.4	24.4
FeSO4 × 7H2O (mg L-1)	19.5	19.5	19.5
Micronutrients (mL L-1)∗	1	1	1

^∗The recipe of the micronutrient solution can be found in Tay et al. (2001).