Sugar cane pith exhibited the highest reducing sugar 2.91%, while sugar cane
bagasse and dry beet pulp recorded lowest reducing sugar values 1.41%. Non
reducing sugar in dry beet pulp amounted 3.91% followed by sugar cane bagasse
3.46%, sugar cane pith 3.45% and sweet sorghum bagasse 1.78%, respectively.
Cellulose percentage reached 34.57, 31.97, 33.20 and 32.76 % for sugar cane
bagasse, sugar cane pith, sweet sorghum bagasse and dry beet pulp, respectively.
Lignin was found to be the lowest value in cell wall constituent it was in the range of
1.93% and 16.35% for dry beet pulp and sugar cane bagasse, respectively.
Treating sugar cane bagasse with 20% H3PO4 concentration gave the highest
percentage of active carbon 47.92%. The active carbon produced from dry beet pulp
recorded the highest percentage of color adsorption 93.40%, sweet sorghum bagasse
gave the lowest value (89.50%). While active carbon from cane bagasse recorded a
high methylene blue number. The various phosphoric acid concentration significantly
affected the color adsorption of active carbon. Treating the by products with
phosphoric acid at 20% concentration exhibited the highest percentage of color
adsorption (96.30%). The active carbon produced from mixing dry beet pulp soaked in
phosphoric acid of 50% concentration gave the highest percentage of color adsorption
100%.
Sugar cane pith exhibited the highest reducing sugar percentage 4.95%
followed by sweet sorghum bagasse 4.86% without significant differences. Using
sulfuric acid 10% gave the highest reducing sugars percentage 5.78% followed by
acetic acid 10%, 5.71% and it did not show any significant differences between them.
Soaking in 100oC in water for 1 hr gave the highest reducing sugar percentage (6.11%)
followed by soaking at room temperature for 48 hr (4.37%) then soaking at room
temperature for 24 h (3.35%).
The highest value (6.38%) was produced by sweet sorghum bagasse treated by
sulfuric acid (10%) concentration. While the lowest value (1.21%) was sugar cane
bagasse treated by water (without adding acids) for one hour. Treating sweet sorghum
bagasse with acetic acid 10% at 100°C for one hour maximized reducing sugar
production, while the sugar cane bagasse gave the lowest values. |
