The State government has decided to provide the city with an extra supply of around 500 mcft of Cauvery water, a portion of which was released from the Mettur dam on Sunday night, and is expected to reach Veeranam tank in Cuddalore in 10-12 days.
CHENNAI: The technology behind desalination plants may appear simple extract seawater, remove salt, make freshwater but operating such plant is a power intensive and can also pollute the environment through toxic brine (salts) effluents.
After it was realized that the solution to tackling water scarcity lay in seawater and the Sun, a team has now set up the country’s first solar-powered desalination plant, with a capacity to generate 10,000 litres of freshwater a day, on 120sqm near Vivekananda Memorial at Kanyakumari.
The solar-powered lo- temperature flash desalination system is locally available, time-tested and marries both technologies. The ministry of earth sciences-funded Rs 1.22 crore experimental project will be soon inaugurated.
Unpredictable rainfall patterns because of climate change, depleting water resources because of extreme groundwater extraction, contamination of available surface/groundwater resources due to discharge of untreated sewage, and/or industry effluents have had an impact on water quantity and quality.
Per capita water availability is expected to reach 1,140 cubic meters by 2050 from 1,820 cubic meters in 2001. As India’s water problems are self-inflicted, the need to adopt sustainable water management practices is crucial.
With thermal power plants being the largest industrial users of water and exceedingly contributing to water-stress, Chennai-based National Institute of Ocean Technology (NIOT) has come out with a novel concept of using coolant water discharge from power plants to produce fresh water.
Thoothukudi Thermal Power Station will be the first in the country to have an in-house 2 MLD (million litres per day) desalination plant based on Low Temperature Thermal Desalination (LTTD) technology.
The Expert Appraisal Committee for Projects related to Coastal Regulation Zone (CRZ) of the Union Ministry of Environment, Forest and Climate Change has recommended CRZ clearance to the State’s first reverse osmosis-based seawater desalination plant proposed by Mangalore Refinery and Petrochemicals Ltd. (MRPL).
Headed by Deepak Arun Apte, the committee in its 207th meeting on January 25 said that the clearance was subject to MRPL ensuring temporary structures installed for laying pipelines for the 70 million litre per day (MLD)-capacity plant are removed within one month of completing the work.
The fast-rising number of desalination plants worldwide – now almost 16,000, with capacity concentrated in the Middle East and North Africa – quench a growing thirst for freshwater but create a salty dilemma as well – how to deal with all the chemical – laden leftover brine
In a UN – backed study made public on Monday, experts estimate the freshwater output capacity of desalination plants over 95 million cubic meters per day – comparable to 40 percent of the high season flow over Niagara Falls.