These methods also require a high level of pre-treatment . The efficiency and costs of the procedure is reliant on the salinity of feed water (Gold Coast 2004 ) In thermal methods , the water will be subjected to evaporation leaving salt behind in concentrated brine . Then , it will be condensed in to provide roughly pure water . Common processes include heat distillation , multi-stage flash , multi-effect distillation , mechanical vapor compression , and thermo-compression distillation . For example , in heat distillation , large amount of heat is being...











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