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Water Treatment

Water treatment plant in Red Hills to get a new lease of life

Wednesday, 06 June 2012 07:08 administrator
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The Hindu             06.06.2012

Water treatment plant in Red Hills to get a new lease of life

K. Lakshmi

Residents of northern and western parts of the city may soon have better access to drinking water. The water treatment plant in Red Hills, from where many parts of Chennai are supplied and in dire need of repair, is all set to be revamped.

After 16 years of its inception, the plant that has a capacity to treat 300 million litres a day (mld) would undergo a revamp. Chennai Metrowater has awarded the contract to VA Tech Wabag, which is currently constructing the desalination plant at Nemmeli on East Coast Road for the water agency, to take up the project.

Rs. 10 crore alloted

It has allocated Rs.10 crore towards the overhauling of the plant. Sources in the VA Tech Wabag said that besides replacing the mechanical and electrical equipments that have worn out over the years, the filter bed and the facility that carries raw water drawn from the Red Hills reservoir to the plant would also be revamped.

“We are able to treat and transport only 150-200 mld because of the damages in the various units of the plant. Once the improvement works are completed by February next year, we will be able to operate the plant to its full capacity,” the sources said.

VA Tech Wabag would also continue to operate and maintain for the next five years. It has been operating the facility for the past one decade. Sources in Metrowater said that the volume of water transported through pipeline has to be treated again at the Kilpauk Water Works to ensure quality. The treated water is supplied to residents in Vyasarpadi, Patel Nagar, Valluvar Kottam and parts of Anna Nagar.

When the project is completed, water could be directly supplied to northern and western parts of the city and the extended areas such as Manali, Madhavaram and Ambattur. Moreover, 5- 10 per cent of water loss during transmission could also be prevented after the revamp of the plant.

 

 

Corporation looks forward to State grant

Wednesday, 29 June 2011 05:25 administrator
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The Hindu        29.06.2011

Corporation looks forward to State grant

Staff Reporter

To revive Rs. 234-crore solid waste management project under JNNURMMONEY PROBLEM:Corporation Commissioner S. Sebastine and Chief Engineer K. Sakthivel inspecting the sewage treatment plant at Sakkimangalam near Madurai on Tuesday.—Photo:S.James
MONEY PROBLEM:Corporation Commissioner S. Sebastine and Chief Engineer K. Sakthivel inspecting the sewage treatment plant at Sakkimangalam near Madurai on Tuesday.—Photo:S.James

Two sewage treatment plants (STPs) at Vellaikkal and Sakkimangalam are ready. But the Rs. 108-crore projects could not be put to good use for the work of laying of underground pipelines were stalled due to lack of funds.

The Corporation had got sanction for Solid Waste Management plan worth Rs. 234 crore under the Jawaharlal Nehru National Urban Renewal Mission. Works like construction of STPs and procurement of vehicles were done. Construction of waste processing unit was nearing completion. But the remaining works of laying underground pipelines for 46 km in leftover areas and renovation of wornout pipelines for 116 km were in initial stage.

“Works worth Rs. 114 crore have been completed. The Corporation could not raise its contribution of nearly Rs. 70 crore (30 per cent of Rs. 234 crore). We have sought grants from the State Government and it is expected soon,” Corporation Commissioner S. Sebastine told reporters during an inspection of the STP at Sakkimangalam. He said replacement of wornout pipelines had to be done in the busy roads and streets around the Sri Meenakshi Sundareswarar Temple. “The roads dug for replacing underground pipelines have to be restored immediately for which we need funds. Hence the works are going slowly,” he said.

The STPs have been designed to treat 170.7 million litres of sewage a day, which would take care of the city's sewage treatment for the next 30 years. The project is scheduled for completion by March 2012. “On completion of the project, no sewage will be let into the storm water drainages and the Vaigai river,” he said. Around 90 MLD of treated sewage could be used for agricultural and industrial purposes, Corporation Chief Engineer K. Sakthivel said. “We can even store the water in the irrigation tanks after getting Tamil Nadu Pollution Control Board clearance,” he said.

 

Corporation sewage treatment plant inaugurated at Ukkadam

Wednesday, 02 March 2011 05:38 administrator
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The Hindu         02.03.2011

Corporation sewage treatment plant inaugurated at Ukkadam

Staff Reporter

Built under Jawaharlal Nehru National Urban Renewal Mission scheme

For cleaner environs: Rural Industries Minister Pongalur N. Palanisamy (third right) inaugurating the sewage treatment plant at Ukkadam in Coimbatore recently. Collector P. Umanath (fourth right), Mayor R. Venkatachalam (left) and Corporation Commissioner Anshul Mishra (second left) are in the picture. - Photo: M. Periasamy
For cleaner environs: Rural Industries Minister Pongalur N. Palanisamy (third right) inaugurating the sewage treatment plant at Ukkadam in Coimbatore recently. Collector P. Umanath (fourth right), Mayor R. Venkatachalam (left) and Corporation Commissioner Anshul Mishra (second left) are in the picture. - Photo: M. Periasamy

The Coimbatore Corporation's sewage treatment plant at Ukkadam, which was inaugurated on Saturday, has achieved standards that are much higher than those prescribed by the Tamil Nadu Pollution Control Board, according to Commissioner Anshul Mishra.

State Minister for Animal Husbandry and Rural Industries Pongalur N. Palanisamy inaugurated the plant in the presence of Collector P. Umanath, Mayor R. Venkatachalam, Mr. Mishra, Superintending Engineer K. Boopathy, Chairman, South Zone, Pynthamil Pari, Assistant Commissioner, South Zone, Lakshmanan among others.

The plant, built at Rs. 55 crore under the Jawaharlal Nehru National Urban Renewal Mission scheme, has a capacity to treat 70 mld (million litres a day) sewage.

At present, the plant treats only about 20 mld of waste water which flows into it from the areas that already have underground drainage system.

Mr. Mishra said the sewage treatment plant had been constructed based on the ‘Sequential Batch Reactor' (SBR) process, which was the most advanced method for sewage treatment. The technology required very less land vis-à-vis other technologies. And, the treated sewage had very low fecal Coliform and turbidity levels, meeting very stringent quality standards.

Mr. Boopathy said compared to conventional sewage treatment technology, the plant would treat sewage to a very high degree.

Gharpure Engineering and Construction Private Limited, Pune, had built the plant with technological input by SFC Environmental Technologies Private Limited.

M. Kumaraguru of SFC Environmental Technologies Private Limited said the sewage that flowed beneath the ground into the plant was first filtered using a 20-mm screen, pumped to ground, and then filtered using a 6-mm screen for removing grit. The filtered water was then pumped simultaneously in to four C-Tech basins for aeration.

Bacteria, during the process, would break down the compounds for about an hour-and-a-half. The treated sewage was then allowed to settle down for 45 minutes, by which time the heavy waste would settle down at the bottom of the tank and the fresh, treated water rose to the top. The water was then decanted and pumped to another tank.

The sludge from the bottom was then taken to centrifuges for removing water and turning it into cakes, which could be used as manure. The water could be used for non-drinking purposes – agriculture, gardening, construction, washing, etc.

The Coimbatore Corporation has designed the tank for 70 mld, for lasting up to 15 years. It has decided to adopt the very same technology at the Nanjundapuram sewage treatment plant, yet to become operational.

 
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