pectinase/100 g and 5 U cellulase/100 g after 120 min (Table 5). In
fact, the yield of soluble solids increased up to 300 min but no
significant improvement was shown after 120 min. The yield was
reduced with a rise of the concentration of cellulase (10 U/100 g). Al-
Hooti et al. (2002) reported lower soluble solids yields
(w67.50e68.22%) than those found in this study (w72.37 g of TSS/
100 g). Moreover, in their study no data were indicated about the
treatment time and the number of units of pectinase and cellulase.
Fig. 1 shows that the addition of the lowest amount of cellulase
(5 U/100 g) to the 50 U of pectinase/100 g permitted a significant
reduction of the turbidity after 120 min. However, the addition of
10 U of cellulase/100 g increased the turbidity in the range of
20e160 min.
The treatment conditions to reach the highest extraction of
soluble solids yield (72.37 g of TSS/100 g) and the lowest turbidity
(186.04 NTU) were: 50 U of pectinase/100 g and 5 U of cellulase/
100 g for 120 min.
3.3. Effect of enzymatic