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Table 3 Recovery of glucose and xylose after pretreatment of bagasse samples at different temperature and time

From: Impact of cultivar selection and process optimization on ethanol yield from different varieties of sugarcane

  Conditions    Glucose (%) Xylose (%)
  Temp Time    WIS Liquor WIS Liquor
Run (˚C) (min) pHa logR 0 55 70 74 120 55 70 74 120 55 70 74 120 55 70 74 120
1 180(185) 5(4) 2.11(2.20) 0.94(0.91) 95 96 97.3 97 4.9 3.9 2.5 2.5 11 10 11 11 78.5 67 66.8 65.9
2 200(205) 5(4) 2.05(2.11) 1.59(1.58) 91 90 93.9 95 8.2 9.1 5.5 4.6 7.2 5.1 4.5 5.9 71.7 73 74.7 65.7
3 180(185) 15(14) 2.07(2.09) 1.46(1.56) 92 90 94 93 7.3 8.5 5.5 5.7 6.4 8.2 4.1 8.6 79.2 72 65.7 60.6
4 200(205) 15(14) 2.06(2.08) 2.06(2.16) 89 86 88.8 90 10.6 11 8.2 7.7 3.4 5.1 3.7 4.1 61.8 53 54.1 36.4
5 176(181) 10(9) 2.13(2.14) 1.10(1.20) 95 95 96.9 97 3.8 4 2.7 3.2 5.3 15 14 13 66.7 76 69.4 74.4
6 204(209) 10(9) 2.08(2.10) 1.98(2.06) 91 86 89.6 93 7.7 12 8.5 5.4 4.9 4.3 3.7 7.2 62.5 58 59.6 46.3
7 190(195) 3(2) 2.06(2.15) 1.07(0.95) 95 95 96.2 97 4 5.8 3.6 2.7 6.8 7.4 8.2 13 84 74 69.4 62.8
8 190(195) 17(16) 2.06(2.08) 1.82(1.92) 89 89 91.3 94 9.6 11 8.1 7 4.2 7.4 4.9 8.1 67.2 71 67.8 47.5
9 190(195) 10(9) 2.08(2.12) 1.57(1.63) 90 91 92 93 7.7 9.4 6.1 5.5 4.5 7.8 5.3 8.6 75.4 85 82.6 78.6
10 190(195) 10(9) 2.09(2.10) 1.56(1.65) 93 92 94 95 7.3 8.7 6.6 5.2 4.9 7 5.7 7.7 78.2 83 77.3 75.9
11 190(195) 10(9) 2.07(2.11) 1.58(1.64) 93 89 91.6 95 7.5 9.8 6.5 5 4.9 7.4 5.7 7.2 78.4 79 77.1 74
  1. Values are expressed as the percentage of theoretical value (content in raw material). The acid concentration at all pretreatment conditions was kept constant at 0.5% (w/w).
  2. The conditions and values in parenthesis were employed for bagasse 120 to have a better response to pretreatment.
  3. aThe values showing the pH for varieties 55, 70 and 74 is the average of the three substrates.
  4. WIS, water insoluble solid; Temp, temperature; and logR0, combined severity factor.