Table 2
Pretreatment effects on the glucose and polyphenol concentrations. Non pretreated test before the hydrolysis stage (NPbh), non pretreated test after the hydrolysis stage (NPah),
ultrasonic pretreatment (UP), basic pretreatment (BP) and calcium carbonate pretreatment (PCa).
NPbh NPah UP BP PCa
Glucose (g/L) 25.01 ± 0.91 31.61 ± 1.53 32.6 ± 0.95 46.85 ± 1.04 32.54 ± 1.43
Polyphenols (mg gallic acid/L) 209.23 ± 4.26 197.98 ± 2.93 160.24 ± 1.49 151.22 ± 0.92 79.20 ± 1.64