Question 4 (5 Marks): Lactic acid (C₃H₆O₃) produced by fermentation is used in the food, chemical, and pharmaceutical industries. Figure1 illustrates the mixing of components to form a suitable fermentation broth. The whole system is steady-state and open. The arrows designate the direction of the flows. No reaction occurs in any of the subsystems.

The mass compositions of each stream are as follows:

1. Water (W): 100%

2. Glucose (G): 100%

3. W and G, concentrations known: W = 0.800 and G = 0.200

4. Lactobacillus (L): 100%

5. W, G, and L, concentrations known: W = 0.769, G = 0.192, L = 0.0385

6. Vitamin G with amino acids and phosphate (V): 100%

7. W = 0.962, V = 0.0385

8. G = 0.833, L = 0.167

1. What is the Flow rate of each stream entering and leaving the units I, II, and III?

2 4 6 1 I II 3 5