The Minjur Desalination Plant is a reverse osmosis, water desalination plant at Kattupalli village, a northern suburb of Chennai, India, on the coast of the Bay of Bengal that supplies water to the city of Chennai.

Construction works were carried out by the Indian company IVRCL and the Spanish company Abengoa, under the direction of the Project Manager Fernando Portillo Vallés and the Construction Manager Juan Ignacio Jiménez-Velasco, who returned to Europe after the inauguration of the plant to work on renewable energy projects.

[1] Water from the plant will be utilised chiefly for industrial purposes such as the Ennore Port and North Chennai Thermal Power Station.

[1] To alleviate the freshwater problems, the state government decided to implement desalination of sea water.

[2] Chennai Water Desalination Ltd. (CWDL) is a special purpose vehicle of IVRCL Infrastructure & Projects Ltd. and Befesa Agua of Spain, created in 2005 to design, build, own and operate the seawater desalination plant for the Chennai Metro Water Supply and Sewerage Board (CMWSSB).

[1] With an installed capacity to produce 100 million liters of drinking water per day, it is the largest such plant in India.

[4] Reverse osmosis (RO) technology is employed at the plant to desalinate the sea water, which contains up to 6.4 ppm aluminium and about 50 NTU of turbidity.

The filtered water is then pumped to the plant where it undergoes various preliminary treatments before being passed through the RO trains.

[1] A reinforced concrete cylindrical intake well of 5 m diameter and 4 m height has been installed nearly 600 m from the shore at a depth of 9 m. A stainless steel screen sits atop the well.