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Water Treatment

Treatment plants planned at 56 locations

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The Hindu      14.02.2017

Treatment plants planned at 56 locations

A proposal for establishment of wastewater treatment plants at 56 locations has been forwarded to the State Government. The treatment plants are estimated to cost about Rs. 142 crore, official sources said.

Based on success of a model plant coming up at Soolai adopting advanced FPSTAR technology developed by a Bengaluru-based laboratory, treatment facilities will be established at the identified points along canals and rivers where sewage and industrial effluent was being let in. The plants are envisaged at vulnerable points along the Perumpallam and Pichakaranpallam canals, besides embankments of Bhavani and Cauvery rivers, the sources said.

The model plant featuring two units with capacity to treat 1.2 lakh litres each per day using Aquatron Boomtube Resonator is touted to be the first plant in the State to convert sewage wastes and industrial effluent into foodgrade water. The facility is slated for commissioning during April.

In the meantime, the Pollution Control Board, which has been testing water samples in the rivers every month to check the extent of Total Dissolved Solids, is learnt to be urging the 30 tannery units in and around Erode town to adopt waterless chrome tanning technology advocated by Central Leather Research Institute.

A Memorandum of Understanding was signed between Erode Tannery Owners’ Association and Central Leather Research Institute (CLRI) for deploying the technology-infusion to contain pollution.

The new technology has already been trial tested successfully in a few industries in Erode district.

The CLRI had promised to establish a common facility centre for the units with aid from the Ministry of Mirco, Small and Medium Enterprises. The technology, CLRI scientists have assured, will lead to enormous saving of water.


Metrowater to sell treated waste water for construction

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The Hindu       23.09.2014 

Metrowater to sell treated waste water for construction

In these days, when freshwater resources are becoming scarce, Chennai Metrowater has come up with the idea of supplying treated waste water to the construction industry.

The industry needs close to 20 lakh litres of water daily for various construction activities. Of this, nearly 6 lakh litres are estimated to be required for major construction sites along the IT corridor. In a bid to ease the burden on groundwater, Metrowater has proposed to build another treatment plant to once again treat the water from the treatment plant in Perungudi.

The water agency is already supplying about 30 million litres a day of recycled water to industries, the Chennai Corporation, and the Tamil Nadu Road Development Company. The Rs. 56.6-lakh plant will treat six lakh litres per day, which will be provided to the industry.

Though the treated waste water is good enough to be used directly, the water agency will treat it again to ensure quality production of concrete and safe handling.

With Metrowater planning to complete the construction of the additional plant in November, the recycled water will be available for Rs. 20 per kilo litre. Besides saving freshwater sources, the project also aims at meeting the expenditure towards treating sewage. Construction contractors may register themselves to get the service, the release said.

A Rs. 56.6-lakh plant will treat six lakh litres per day, which will be provided to the industry

The industry needs close to 20 lakh litres of water daily


CRZ clearance for Adyar creek eco-restoration

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The Hindu               18.02.2014

CRZ clearance for Adyar creek eco-restoration

B. Aravind Kumar

Sewage outfall into river to be diverted to existing network before opening of sand bar

Eco-restoration of Adyar creek and estuary, on 300 acres, is likely to take off soon.

Stipulating four conditions, the Union ministry of environment and forests (MoEF) has recommended coastal regulation zone (CRZ) clearance for the project.

According to officials, the expert appraisal committee had instructed the government to trap all the sewage outfalls presently connected to Adyar river/creek and divert it to the existing sewage network before opening the sand bar.

The committee has also directed that all sewage networks should be eventually diverted to the sewerage treatment plant for final treatment.

MoEF has stipulated no sewage effluent or industrial effluent should be allowed to enter Adyar creek/river within the project area as committed, said an official.

MoEF has also told the authorities there should not be construction of any permanent structure within the project area and only activities permissible under CRZ Notification, 2011, should be carried out.

Besides, the project proponent — Chennai Rivers Restoration Trust — has been asked to obtain approval from the Chennai Corporation for accepting the excavated soil and debris from the choked Adyar creek.

The clearance has been granted keeping with the spirit of the Tamil Nadu State CZMA recommendation and the MoEF has a word of praise for the good work done in Phase-1 of the project, said the official.

The project proponent had argued they wanted the project to be taken up and completed in one go but the expert appraisal committee was clearly not for opening the sand bar and letting any untreated effluent into the sea. At present, Adyar river and creek receive a large quantity of untreated effluent, said the official.

Adyar river and creek receive a large quantity of untreated effluent.


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