Table 11.

The average separation factors of the four separation methods.

VFA (i)	RO		NF		FO		SILM
	αi/ac	αi/prop	αi/ac	αi/prop	αi/ac	αi/prop	αi/ac	αi/prop
propionate	0.82	-	0.73	-	1.11	-	1.25	-
butyrate	0.85	1.04	0.51	0.71	0.49	0.44	1.41	1.13