what are the disadvantages of evaporation?

Evaporation can require a significant amount of energy.

An air permit may be required(atmospheric evaporator only).

Foam may be a problem.

Efficiency drops as the solution becomes more concentrated (referred to as boiling point rise).

The method may pose a fire hazard (liquids with a low flash point).

Odors from the vapors can be quite obnoxious.

Vapors and or solutions may be corrosive; exotic metals may be required. hope dis helpz uh..! cheerrzz..!! :) :)