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Thursday, Oct 13, 2005
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DEALING WITH ASH: Tiruvallur Collector Pankaj Kumar Bansal (centre) confers with North Chennai Thermal Power Station and other department officials recently on using fly ash generated by the station.
CHENNAI: The Thiruvallur District Collectorate has asked all construction companies in the district to use fly ash available with the North Chennai Thermal Power Station for its building blocks.
An NCTPS press release said the District Collector held a meeting at the power station last week to impress upon construction companies to use fly ash in small percentages in building blocks, including bricks and tiles.
Fly ash, one of the by-products of the thermal power stations, often ends up in garbage disposal sites.
Its potential as an ingredient for building material was realised in 1999 when the Central Government issued a notification for using fly ash and bottom ash in making building material. In 2003, an amendment was issued making it compulsory for construction companies within a radius of 100 km from coal or lignite-based thermal power stations to use a certain percentage of the fly ash.
The North Chennai Thermal Power Station has three power generating units, each with a capacity of 210 MW. The ash deposit at the station's ash pond is to the tune of 10 million tonnes.
Each of the thermal units use up to 9,500 tonnes of coal every day with an ash content of 42 per cent.
The three units produce about 3,400 tonnes of dry fly ash from its electrostatic precipitators and the boiler units contribute another 800 tonnes.
The ash is discharged to the ash ponds, situated about seven km from the powerhouse. Cement industries and some small-scale industries use up to 1,000 tonnes.
Thiruvallur Collector Pankaj Kumar Bansal spoke at the meeting convened by the Fly Ash Implementation Committee.
Representatives of the Public Works Department, Highways Department, Industries Department, Geological and Mines Department, Tamil Nadu Pollution Control Board and Tamil Nadu Electricity Board participated.
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