Sucrose formation, constituent of sugar cane and sugar cane juice

2. RASHIDUL ISLAM
20121107007
Department of Applied Chemistry and
Chemical Engineering.
BSMRSTU

3. COURSE TITLE: CHEMICAL TECHNOLOGY-II
COURSE NO: ACCE-462

4. Sucrose Formation in Sugar cane
• Sucrose forms in sugar cane mainly by
photosynthetic process.
• The photosynthetic process is divided into
two stage
− Photo stage and
− Synthesis stage

5. Sucrose Formation in Sugar cane
• The photo stage proceeds in the presence of
light
• Synthesis stage is taken place in the darkness.
• The chlorophyll catalyses this process.

6. Photo Stage
• In this stage light energy is convert to
chemical energy.
• In leaves, water (H2O) molecules break down
and form oxygen (O2), NADPH and ATP
(energy carriers) in the presence of light and
chloroplast.
[ATP= Adenosine triphosphate]
[NADPH= Nicotinamide adenine dinucleotide phosphate]

8. Photo Stage

9. Synthesis Stage
• CO2 is Converted into glucose.
• The CO2 react with RuBP and energy from
ATP and NADPH to form G3P (an energy-rich
glucose)
• The G3P is then converted into glucose.
[RuBP= Ribulose-1,5-bisphosphate]
[G3P= Glyceraldehyde 3-phosphate]

11. Overall Photosynthetic process

12. Overall Reactions

13. Constituent of Sugar cane
Name of Constituents Wt. Percentage
Water 73-76
Solid substance 24-27
Fiber 3-5
Soluble solid substance 11-16
Juice constituent sugar 10-16

14. Constituent of Sugar cane juice
Name of constituents Percentage
Glucose 70-88
Fructose 2-4
Salt 2-4
Protein 0.1-0.5
Gums 0.506
Wax, fats, phosphates 0.3-0.5

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