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Science & Tech.
Pradeep Kumar

20/06/21 11:00 AM IST

Sea water desalination

In news

Seawater desalination through solar thermal forward osmosis brings relief to drought-prone Tamil Nadu village

Significance
  • It will benefit from 20,000 liters per day of freshwater produced from seawater.
  • The customized demand-driven convergent water solution through FO will supply two liters of good quality drinking water per person per day for 10,000 people in the village, successfully overcoming a major drinking water shortage in the village.
  • The produced water will be supplied to the local people with the support of villagers and panchayat.
  • This initiative of DST can pave way for scaling up the emerging technology in various coastal rural areas of the country to address drinking water shortage.
Technology
  • The FO system facilitates high recovery, low energy consumption, the potential for resource recovery, especially in solutions of high osmotic pressure, less fouling of the membrane because of low-pressure operation, easier and more effective cleaning of the membrane, longer membrane life, and lower operating costs.
  • The sea water FO technology operates at near 2 bar pressure unlike sea water RO that operates at 50 bar pressure. 
  • It is versatile, has high energy efficiency and low operation and maintenance costs compared to other technologies.
Source: PIB

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