DESALINATION BY DISTILLATION: EVAPORATION AND CONDENSATION OF WATER
FIGURE 6.31 Distillation is the oldest method of desalination. The basic technology is well developed and dependable. Its major shortcoming is that the process requires a lot of energy. Lowering the atmospheric pressure in distillation chambers reduces energy costs for distillation. To increase water yield, several distillation chambers may be connected in series, each with a lower atmospheric pressure.