Table 1. Variations of soluble protein, polysaccharide and VSS reduction with time in different reactors^a.

	Time (d)	Soluble protein (mg/L)	Soluble polysaccharide (mg/L)	VSS reduction (%)
FNA + SDBSb	1	758 ± 21	108 ± 5	12.3 ± 0.5
	2	1254 ± 36	215 ± 10	26.9 ± 0.9
	3	1545 ± 38	304 ± 14	35.5 ± 1.2
FNA	1	325 ± 15	58 ± 3	9.5 ± 0.4
	2	658 ± 19	113 ± 5	18.6 ± 0.8
	3	854 ± 24	165 ± 7	24.6 ± 1.2
SDBS	1	584 ± 18	75 ± 4	10.3 ± 0.6
	2	859 ± 25	148 ± 6	21.9 ± 1.1
	3	1025 ± 31	196 ± 8	29.5 ± 1.6
Blank	1	185 ± 10	48 ± 2	5.4 ± 0.3
	2	247 ± 12	77 ± 3	10.2 ± 1.2
	3	318 ± 14	95 ± 4	13.7 ± 1.3

^aThe data are the averages and their standard deviations in triplicate tests.

^bThe FNA concentration was 1.54 mg FNA/L, SDBS dosage was 0.02 g/g DS.