Mass Transfer
Acetic acid will be most economically separated from a dilute solution of acetic acid in water by

Evaporation
Continuous distillation
Solvent extraction
Absorption

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Mass Transfer
Blowdown in a cooling tower

Is undesirable
All of these
Increases the scale forming tendencies of water
Means discarding a small fraction of circulating water to prevent and limit the concentration of salt and impurities

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