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Water Treatment

Metro Water sends crores down the drain

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The New Indian Express 21.12.2009

Metro Water sends crores down the drain


A big well at the New Adyar Pumping Station that needs a parapet wall.

CHENNAI: Several crores worth of incomplete works under the Chennai City River Conservation Project (CCRCP) have been given the go-ahead by Metro Water authorities despite the request of area engineers not to do so.

According to documents available with Express, 39 pe­nding works worth several crores of rupees in New Adyar Pumping Station and LB Road Pumping Station were left unfinished despite several representations to the senior aut­horities in the department.

The area engineers of the two pumping stations had written to the managing director and chief engineer (operation and maintenance) in May last year stating that despite several reminders, the CCRCP wing had not taken up the pending works.

“During the inspection of CCRCP works by the managing director on April 12, 2008 at R K Mutt Road near Adyar Sewage Pumping Station, it was informed that several pending works in the pumping station are yet to be atten­ded by the CCRCP wing. The managing director instructed to take over the operation of the sewage pumping station by the O&M wing and all the pending works to be carried out by the CCRP wing in a phased manner,” the letter of the engineers said.

Yet, the works remain pending. The chief engineer O&M wing brushed aside the note of the area engineers. In his reply on August 27, 2008, he stated that “the liability period expired on March 31, 2007, and the works have been completed as per the Bills of Quantities and the pumpsets have been operated for more than two years and there is no further fund available to attend works beyond the Bills of Quantities package-4 under this project.

“It is also informed that there is no pending works as remarked in the letter and if any rectification works are found, the same may be atte­nded by the O&M Wing as defects liability period expired on March 2007,” the chief engineer stated.

Echoing the chief engineer, the superintending engineer (SE) CCRCP informed that all the works relating to the New Adyar Sewage Pumping Station had been completed by March 31, 2006. He claimed that a trial run had been carried out and the pumpsets had been operated for about two years from the date of commissioning.

CCRCP engineering director G Elangovan denied that there were pending works. “We have completed the work. Supplies were made. Contractors have finished the work. The liability period for electrical works is one year and civil works is five years. If there are any other defects, Metro Water will look into it,” he said.

However, Citizens Guardians chairman V Ravichandran claimed there was ample proof to suggest that there a lot of works were still pending. “How can the waterways be cleaned if the pending projects are not completed? Why did the authorities lie that the project was completed when crores of worth of works are pending?” he wondered.

Ravichandran urged the government to take immediate action against those responsible for the lapses.

Last Updated on Monday, 21 December 2009 10:19
 

Sewage treatment plant in Assembly complex to save water

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The Times of India 20.11.2009

Sewage treatment plant in Assembly complex to save water

CHENNAI: The Sewage Treatment Plant (STP) coming up inside the new Tamil Nadu Assembly complex in the Omandurar Government Estate on Anna Salai will help save more than 2 lakh litres of water a day. The treated effluent will be used to water the gardens spread over nearly three lakh sqft and reduce dependence on Metrowater or groundwater.

The new assembly complex, set to be a landmark, will lead by example in the area of water conservation. The rainwater harvesting structures there will store 1.2 lakh litres while the STP, likely to come up on the Sivananda Salai side, will treat 2,50,000 litres of water everyday.

"For the remaining area (other than the three lakh sqft of gardens), we will depend on rainwater harvesting. Thus, the need to purchase water or use groundwater or Metrowater can be avoided," said K Senthil Manivanan, project coordinator, Archvista Engineering Projects Pvt Ltd, the firm in charge of setting up the STP and rainwater harvesting structures.

The STP, costing nearly Rs 50 lakh, will be approximately 20 m-long, 8m-wide and 4m-deep. "The treated effluent will adhere to the Tamil Nadu Pollution Control Board norms. The water let out after treatment will have a PH value ranging between 6.5 and 5.5, the bacteria level will be 10 milligram per litre, the chlorine level 100 milligram per litre and suspended solids less than 10 milligram," said Senthil.

Sewage water will first enter the collection tank and then a pumping chamber. From there, it will be led to aeration and settling chambers for removal of sludge. The clear water will be then be allowed to flow into disinfection and filtration tanks. Finally, treated effluent will collect in a tank.

"Even the sludge will not be discarded. It will be used as manure for the soil," said Senthil.

With chief minister M Karunanidhi wanting to have the next budget session in the new Legislative Assembly, construction is expected to be completed by March 2010. The assembly complex, spread over an area of 86,000 sq m, is being built at a cost of Rs 425 crore. Adjacent to it will come up the new secretariat complex, covering 69,400 sqm and costing Rs 280 crore. The STP will cater to both buildings.

The secretariat complex will also have chargers for electric vehicles. "This is part of a green building' initiative," said a senior government official.

 

Low capacity chokes drains

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Deccan Chronicle 03.11.2009

Low capacity chokes drains

November 3rd, 2009
By Our Correspondent

Chennai, Nov. 2: Officials of Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) have always been ‘enterprising’ in project application.

The most recent venture they have undertaken is the inclusion of urban local bodies adjoining the metropolis into their sewage net, unmindful that they are already choking.

Even as Metro Water experts struggle to avoid the recurring sewer blocks and overflow in the city and suburbs, works are afoot to develop underground drainage system in Avadi, Ambattur, Tiruvotriyur, Maduravoyil, Madhavaram, Tirumalisai, Ullagaram and Puzhithivakkam municipalities and network them with the board’s existing system.

Some CMWSSB engineers complained that these additions would only worsen the situation here, as seldom a new treatment plant is developed to accommodate the new additions.

The existing plants at Kodungayur, Villivakkam, Koyambedu, Nesapakkam and Perungudi have a joint treatment capacity of 486 mld (million litres per day). Though the board claims that CCRCP (Chennai city river conservation project) had helped increase capacity to 486 mld, against the earlier 222 mld, flawed techniques had made the city vulnerable to frequent sewage overflow and reckless discharge into the Buckingham Canal and Cooum river among other waterways.

Construction of a new 6 mld treatment plant at Navalur, on Rajiv Gandhi Salai, to cater to the needs of the IT corridor is on the cards. However, no plant has been planned to accommodate the local bodies’ addition, Metrowater sources told this paper.

Though the implementation of the proposed UGD in the adjoining local bodies would be a gift in the offing for the taxpayers there, the plans would not serve the purpose until the treatment capacity is increased, the experts observed.

Last Updated on Tuesday, 03 November 2009 06:02
 


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