Answer :
Answer:
The amount of product (42% concentrate) produced per 100 kg fresh juice fed to the process and the fraction of the feed that bypasses the evaporator is 6.27 kg and 0.0627 (Fraction)
Explanation:
Given:
Fresh orange juice --> 10.0 wt% solids
Frozen orange juice concentrate --> 42.0 wt% solids
The frozen concentrate is obtained by evaporating water from the fresh juice to produce a mixture that is approximately 57.0 wt% solids
The concentrate from the evaporator is blended with fresh orange juice to produce a final concentrate that is approximately 42.0 wt% solids
Assume a basis of 300.0 kg of fresh juice fed to the process.
Calculate the amount of product (42% concentrate) produced per 100kg fresh juice?
Overall Solid balance
0.10 * (100 kg) = 0.42 m5
m5 = 23.80 kg
Overall mass balance
100 kg = m3 + m5
m3 = 76.19 kg
(Solve both equations simultaneously)
Mixing point mass balance
m4 + m2 = m5
Mixing point Solid balance
0.57 m4 + 0.10 m2 = 0.42 m5
0.57 kg (23.80 kg - m2) + 0.10 m2 = 0.42 m5
13.57 kg - 0.57 m2 = 9.99 kg
m2 = 6.27 kg
m4 = 17.53 kg
bypass balance
100 = m1 + m2
m1 = 93.73 kg
Fraction = [tex]\frac{m2}{mf}[/tex] = [tex]\frac{6.27}{100}[/tex] = 0.0627