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Table 1 Chemical composition of pretreated RSH before and after detoxification, followed by concentration

From: Bioprocess optimization for enhanced xylitol synthesis by new isolate Meyerozyma caribbica CP02 using rice straw

Pretreat-ment

Sugars (gL−1)

Aliphatic acids (gL−1)

Furans (gL−1)

Total phenols

(gL−1)

Glucose

Xylose

Arabinose

Acetic acid

Formic acid

Levulinic acid

5-HMF

Furfural

 

UTRSH#

1.0 ± 0.26d

14.91 ± 0.53d

3.60 ± 0.79d

1.5 ± 0.13b

0.28 ± 0.08a

0.04 ± 0.01a

0.029 ± 0.017b

0.132 ± 0.002d

0.98 ± 0.007d

TRSH

0.93 ± 0.06d

12.47 ± 0.17e

2.34 ± 0.05d

0.89 ± 0.02c

0.06 ± 0.01a

0.0001 ± 0.0001b

0.0003 ± 0.0001a

0.005 ± 0.002e

0.19 ± 0.04e

RSH*1

3.70 ± 0.54c

59.22 ± 1.0c

12.04 ± 1.00c

1.43 ± 0.05b

0.09 ± 0.03a

0.02 ± 0.01a

0.015 ± 0.002a

0.034 ± 0.002c

0.64 ± 0.026c

RSH2

5.53 ± 0.3b

78.62 ± 0.71b

20.30 ± 0.33b

2.06 ± 0.16a

0.11 ± 0.07a

0.03 ± 0.02a

0.018 ± 0.001a

0.044 ± 0.002b

1.80 ± 0.036b

RSH3

7.82 ± 0.65a

98.73 ± 0.93a

27.45 ± 0.65a

2.17 ± 0.20a

0.25 ± 0.03a

0.05 ± 0.02a

0.022 ± 0.013a

0.059 ± 0.002a

2.47 ± 0.052a

  1. #UTRSH; Rice straw hydrolysate obtained after steam pretreatment; TRSH; activated charcoal treated hydrolysate; * RSH; Detoxified and vacuum concentrated rice straw hydrolysate consisting of initial xylose concentration adjusted at, 1) 59.22 ± 1.00, 2) 78.62 ± 0.71 and, 3) 98.73 ± 0.93 gL−1
  2. Depicted values are the averages ± standard deviations of the outcomes of three independent replicate experiments. Significant differences were evident in values with different letters in the same column (P < 0.05)