Considering the importance of fresh water for islands, Low Temperature Thermal Desalination (LTTD) plants of 100 m3/day capacities were established in the Kavaratti, Minicoy and Agatti Islands in the Union Territory of Lakshadweep, for conversion of seawater into potable water, suitable for installation in the island territories and near the coastal Power Plants. The LTTD is a process under which the warm surface sea water is flash evaporated at low pressure and the vapour is condensed with cold deep sea water. The LTTD technology does not require any chemical pre and post-treatment of seawater and thus the pollution problems are minimal and suitable for island territories. Since no effluent treatment is required, it gives less operational maintenance problems compared to other desalination processes.
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