p4 32 fresh orange juice contains 12:0 wt% solids and the balance water and concentrated orange juice contains 420 wt% solids initially a singe evaporation process was used for the concentration, but volatile constituents of the juice escaped with the water, leaving the concentrate with a flat taste. the current process overcomes this problem by bypassing the evaporator with a fraction of the fresh juice the juice that enters the evaporator is concentrated to 58 wt solids, and the evaporator product stream is mixed with the bypassed fresh juice to achieve the desired final concentration.

1. (15 points). Consider a process to concentrate orange juice. You send a mi water into an evaporator (you can consider this a two-component mixture, where juice is one component and water is the other com juice/water mixture, concentrating the juice. The feed to the evaporator consists o water, with the balance juice. The feed rate is 377 kg/min. The composition of the concen juice stream leaving the evaporator is 20% by mass water, with the balance juice xture of juice and ponent). Some of the water is evaporated from the 80% by mass trated- Calculate the flow rate of the water stream leaving the evaporator.

During the production of sugar crystals from sugar cane, raw sugar cane juice is sent to a series of three evaporators to remove water. The sugar cane juice, which is 85 wt% water, is fed to the first evaporator at 5,000 lbm/h. Equal amounts of water are removed in each evaporator. The concentrated juice out of the last evaporator is 40 wt% water. Calculate: The flow rate of the concentrated juice out of the last evaporator. The amount of water removed in each evaporator. The concentration of water in the juice fed to the second evaporator.