Aspects of the desalination of mineralized water in arid
and water-deficient territories

Summary

Supplying drinking water in coastal arid and water-deficient regions has been an urgent problem due to the population growth and progressive pollution of natural waters. To desalinate seawater, evaporation (distillation) or a membrane separation process – reverse osmosis – is usually used. The justification for choosing a seawater desalination method and the productivity of desalination plants is based on the solution of a number of closely related engineering, economic and environmental tasks. Water desalination involves relatively high energy costs; therefore, reducing the costs can be provided by increasing the fuel heat-availability factor, that is, by using cogeneration (cogeneration of heat and electricity). This determines the comprehensive technology of desalination using membrane methods of demineralization followed by the evaporation of the reject water. Herewith, the balance of the reverse osmosis and evaporator plant performance is determined by the ratio of the generated thermal and electrical energy.

Key words

potable water , reverse osmosis , desalination , desalination , evaporation , sea water

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