Corn-steep liquor contains 2.5 wt% dextrose (i. e. the mass fraction of dextrose is 2.5/100 = 0.025) and 50 wt% water; the rest of the liquor stream is solids. Beet molasses contain 50 wt% sucrose, 1.0 wt% dextrose, and 18 wt% water; the rest of the molasses stream contains solids. Beet molasses is mixed with corn-steep liquor and pure water in a mixing tank to produce a dilute sugar mixture. The exit stream contains 2.0 wt% dextrose and 12.6 wt% sucrose, and is ready to be fed into a fermentation unit.
a. Draw a diagram of the system and label entering and exiting streams.
b. What are the mass fractions of dextrose, sucrose, solids, and water in the exit stream?
c. What is the ratio of the mass flow rate of the water stream to the mass flow rate of the corn-steep liquor stream?
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Corn-steep liquor contains 2.5 wt% dextrose (i. e. the mass fraction of dextrose is 2.5/100 = 0.025)...
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