UPSC Prelims Marathon Quiz

Both the statements are correct.

• Statement 1 is correct. Low-temperature thermal desalination (LTTD) is a technique for desalination. It works on the notion that; water evaporates at lower temperatures, at low pressures. It utilizes vacuum pumps for creating a low pressure and low-temperature environment, resulting into evaporation of water at a temperature gradient of 8 °C. Cooling water is supplied from deep sea depths, which is pumped up to condense evaporated water vapor. We get purified water from the resulting condensate.
• Statement 2 is Correct. 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.

Source) https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1843523