Low-Temperature Thermal Desalination (LTTD)


    In News

    • National Institute of Ocean Technology (NIOT) is working at making the Low-Temperature Thermal Desalination technology process free of emissions.


    • Desalination is a process that takes away mineral components from saline water. It is  used in places where freshwater supplies are scarce and seawater is readily available.
    • Desalination is easily scalable and can be used irrespective of weather conditions.
    • LTTD which stands for Low-Temperature Thermal Desalination  exploits the difference in temperature (nearly 15°C) in the ocean water at the surface and at depths of about 600 feet. 
    •  This cold water is used to condense water at the surface.
    • The water at the surface  is warmer and is maintained at low pressure using vacuum pumps.
    • water evaporates  at ambient temperatures at such low pressures and this resulting vapour when condensed with the help of cold water from the depth is free of salts and contaminants and is fit to consume.


    National Institute of Ocean Technology (NIOT)

    • The National Institute of Ocean Technology(NIOT) was established in 1993 as an autonomous society under the Ministry of Earth Sciences in India.
    • NIOT aims to develop reliable indigenous technologies to solve various engineering problems associated with the harvesting of non-living and living resources in India’s exclusive economic zone, which is about two-thirds of the land area of India.
    • NIOT is the nodal institution for the Deep Ocean Mission, which encompasses all the areas of ocean technology like the development of manned submersible, offshore large-scale desalination, ocean thermal energy conversion, etc.

    Source: TH