Optimization of Sulfide/Sulfite Pretreatment of Lignocellulosic Biomass for Lactic Acid Production

Table 5

Kinetic parameters of lactic acid fermentations during batch culturing of Lactobacillus acidophilus.

Substrate	Reagent for pretreatment	γ (initial sugar conc.)	γ (lactic acid)	η (lactic acid)	Productivity
		gL^−1	gL^−1	gg^−1	gL^−1·h^−1
Corncob	Na2S	40.0	26.48±0.32	0.76	0.44
	Na2SO3	40.0	24.11±0.94	0.75	0.40
Bagasse	Na2S	40.0	25.27±0.46	0.76	0.42
	Na2SO3	40.0	25.36±0.52	0.76	0.42
Water hyacinth	Na2S	40.0	31.73±0.82	0.86	0.52
	Na2SO3	40.0	31.21±0.61	0.86	0.52
Rice husk	Na2S	40.0	30.31±0.69	0.83	0.50
	Na2SO3	40.0	30.03±0.47	0.83	0.50
Glucose	No treatment	40.0	35.61±0.86	0.96	0.59

η (lactic acid) = lactic acid produced/sugar consumed (g/g).