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Water Treatment

Nemmeli to get 2nd desalination plant at Rs 1,000cr

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The Times of India                  17.04.2013 

Nemmeli to get 2nd desalination plant at Rs 1,000cr

CHENNAI: The day is not far when all of the city's water needs will be met by mega plants that desalinate seawater — or so successive governments would have us believe.

But the latest such project is meant to meet the needs of long neglected areas that are now part of the extended city limits. Chief minister J Jayalalithaa said in the assembly on Tuesday that her government would set up an additional desalination plant in Nemmeli at a cost of Rs 1,000 crore.

The city receives 200 million litres a day (mld) from the two existing desalination plants at Minjur and Nemmeli. However, experts question the feasibility of desalination because of the high costs involved. "The desalination plant will augment the city's water supply by another 150 MLD," Jayalalithaa said. The project will come up on a 10.5-acre site abutting the recently commissioned first Nemmeli unit off East Coast Road.

Jayalalithaa had in March launched the first plant with a capacity of 100mld. The chief minister said the water will be supplied to 6.46 lakh residents of Alandur, Perungudi, Kottivakkam, Puzhuthivakkam, Pallikaranai, Madipakkam, Sholinganallur, Karapakkam, Neelankarai, Injambakkam, Semmanchery, Uthandi and Okkiyam Thoraipakkam.

The government has also decided to complete its ambitious desalination plant at Pattipulam off ECR within four years. The Pattipulam plant will have an initial capacity of 200mld. This will be expanded to 400mld at a later stage. The AIADMK chief took credit for the Veeranam water supply scheme commissioned in 2004 during her previous regime.

"It was my government that launched the Veeranam scheme to end the water crisis at the time with a supply of 180mld," she said. "We also came up with the Minjur desalination plant in north Chennai," she said.

In what should cheer residents of areas recently added to the city, the government will take up at least nine drinking water schemes for these localities at a cost of 192.2 crore. In the current fiscal, at least 14 additional areas with a total of 3.47 lakh people will be covered at a cost of 303.78 crore.

The growing water demand and depleting storage in reservoirs, however, have alarmed the city's water managers. "The situation is getting bad. If we don't come up with alternatives right now, the future appears to be grim," a senior official said.

While the Nemmeli plant provides some degree of relief, supply from Veeranam remains unsatisfactory.
Last Updated on Wednesday, 17 April 2013 12:14

TN Govt to set up Rs 1,000-cr desalination plant in Chennai

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Business Line               16.04.2013

TN Govt to set up Rs 1,000-cr desalination plant in Chennai

The plant would come up over 10.5 acres, currently lying vacant adjacent to the existing desalination plant in Nemmeli along the East Coast Road, Chief Minister, J. Jayalalithaa, said today.

The plant would come up over 10.5 acres, currently lying vacant adjacent to the existing desalination plant in Nemmeli along the East Coast Road, Chief Minister, J. Jayalalithaa, said today.
A 150-million-litre-a-day desalination plant to convert sea water to drinking water is to come up adjacent to the Nemmeli desalination plant, Chief Minister J. Jayalalithaa announced in the Assembly today.

The additional capacity will come up at a cost of about Rs 1,000 crore on the 10.5-acre vacant plot next to the existing desalination plant which was formally inaugurated in February.

The plant, which is in operation, about 45 km South of Chennai on the East Coast Road, now supplies about 100 million litres of fresh water daily.

The additional capacity will supply drinking water to over 6.46 lakh residents in the suburbs to the South of Chennai which were added to the City Corporation limits.

A 200-million-litre-a-day desalination plant will also be established at Pattipulam to the South of Chennai with provision to expand to 400 million litres. This unit will be set up within four years, she said.

The expanded portions of the city will also get over 225 km length of integrated roads at a cost of Rs 290 crore, 1.10 lakh energy efficient street lights at a cost of Rs 300 crore, and sewerage treatment plants at a cost Rs 121 crore.


New technology to prevent sewage outflow

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The New Indian Express                      09.04.2013

New technology to prevent sewage outflow

Chennai Metro Water is now adopting qa new technology to prevent sewage outflow onto the street.   Metro Water officials said that Municipal Administration and Water Supply Minister K P Munusamy had asked them to implement a `3.60-crore project so that sewage outflow is minimised in the city.

Accordingly,  Metro Water would install ultrasonic level detectors in sewage collection wells to automatically pump sewage. Sources said the technology would be implemented in 218 pumping stations across the city and would bring in efficiency and better monitoring of sewage pumping stations. A pumping station is an integral part of a sewage network. Its primary role is to collect waste water and pump it from one location to another.

The official said that so far the pumping stations had been operated manually but now, with the technology, the whole process would be automatically controlled. A level detector will determine the height of waste water in the well and send a signal to a controlling system. The controlling system will start and stop large pumps, which empty the well and transfer the waste water on its journey towards a sewage treatment plant.

The whole procedure will be completed without human intervention, and will prevent sewage overflow on the streets. The project will be taken up at a cost of Rs 3.60 crore, the official said.

Metro Water is also going to introduce automated an inline water quality monitoring system to constantly monitor the quality of water supplied to residents.

Officials told City Express that the `1.80-crore project would be implemented with the setting up of monitoring devices at 50 spots across the city.

Currently, water samples are collected manually every day from water distribution stations to monitor quality. Officials said the devices would be attached to pipelines and would test water quality during the hourly flow of water. The sensors in the device will transmit the data to a central control room to be set up in the head office. Turbidity, residual chlorine and PH levels will be monitored.


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