Table 2. Optimization of the ratio of glycerol to sugars in lignocellulosic hydrolysates for 1,3-PD production.

Co-substrate	Glycerol (g): sugars (g)	Carbon consumed (g/L)		Product (g/L)			Biomass (OD620)	Yield (mol 1,3-PD/mol Glycerol)
		Glycerol	Sugar	1,3-PD	Acetate	Butyrate
Corn stover hydolysate	1:1	19.91 ± 0.27	20.05 ± 0.25	14.03 ± 0.17	4.26 ± 0.38	5.70 ± 0.12	5.85 ± 0.05	0.85
	2:1	20.79 ± 0.18	10.11 ± 0.14	14.58 ± 0.07	4.68 ± 0.25	3.26 ± 0.06	5.30 ± 0.16	0.85
	4:1	20.35 ± 0.22	4.88 ± 0.30	14.21 ± 0.15	3.93 ± 0.37	1.40 ± 0.21	4.04 ± 0.28	0.84
	8:1	19.30 ± 0.36	2.62 ± 0.09	12.44 ± 0.23	3.29 ± 0.29	1.10 ± 0.11	3.70 ± 0.24	0.78
Corncob molasses	1:1	20.24 ± 0.19	19.64 ± 0.36	13.89 ± 0.08	4.46 ± 0.22	7.11 ± 0.33	4.97 ± 0.35	0.83
	2:1	20.67 ± 0.06	10.39 ± 0.12	14.24 ± 0.15	4.54 ± 0.27	2.85 ± 0.07	4.47 ± 0.26	0.83
	4:1	20.37 ± 0.19	5.18 ± 0.07	14.11 ± 0.22	4.41 ± 0.12	1.42 ± 0.30	4.04 ± 0.08	0.84
	8:1	20.54 ± 0.11	2.49 ± 0.20	12.79 ± 0.16	3.48 ± 0.23	1.38 ± 0.10	3.05 ± 0.28	0.75