Detoxification of Corncob Acid Hydrolysate with SAA Pretreatment and Xylitol Production by Immobilized Candida tropicalis

Table 3

Behaviour of repeated-batch fermentation for xylitol production by immobilized whole cell from corncob acid hydrolysate via SAA pretreatment.

Parameters	Repeated-batch fermentation
	Round 1		Round 2		Round 3		Round 4		Round 5
	DS	DA	DS	DA	DS	DA	DS	DA	DS	DA
𝑌𝑐/%	77.4±0.11	67.2±0.77	99.8±0.72	99.7±0.72	100.0±1.00	88.7±0.45	99.6±1.65	77.9±0.14	99.7±1.37	66.5±1.85
𝑃𝐹/g·L^−1	40.58±0.56	29.42±1.11	57.84±1.78	51.07±0.36	58.71±1.03	45.77±1.46	56.50±0.94	40.27±1.58	57.90±0.37	30.45±1.85
𝑌/g·g^−1	0.53±0.02	0.47±0.01	0.59±0.01	0.55±0.00	0.60±0.02	0.55±0.01	0.59±0.01	0.55±0.02	0.60±0.00	0.50±0.00
𝑄𝑠/g·L^−1·h^−1	0.63±0.00	0.52±0.01	0.82±0.01	0.78±0.01	0.82±0.01	0.69±0.00	0.81±0.01	0.61±0.01	0.80±0.00	0.52±0.02
𝑄𝑝/g·L^−1·h^−1	0.34±0.00	0.25±0.01	0.48±0.01	0.43±0.00	0.49±0.01	0.38±0.01	0.47±0.01	0.34±0.01	0.48±0.00	0.25±0.02

DS: detoxification via SAA pretreatment; DA: detoxification via adsorption.
𝑌_𝑐: percentage of xylose consumption each round; 𝑃_𝐹: final xylitol concentration each round; 𝑌: yield of xylitol based on consumed xylose; 𝑄_𝑠: xylose uptake rate; 𝑄_𝑝: xylitol volumetric productivity.