Water conservation efforts (2007) ITC Limited PSPD Unit, Kovai (Tamil Nadu)

A water balance approach has been adopted within the mill and specific water consumption as well as per capita domestic consumption have also been lowered

This presentation describes the water conservation efforts made by ITC Limited,  PSPD unit, Kovai, Tamil Nadu. ITC's Kovai unit manufactures paperboard and specialty papers (PSPD). Investments of Rs 30 million in water conservation, Rs.500 million on energy conservation and Rs.150 million on waste utilization have helped this plant achieve many breakthroughs, among them zero effluent discharge and zero solid waste output. 100% of the fly ash from the boiler, sludge from the ETP & plastics from waste is recycled.

The use of waste biomass as the main fuel for the boiler has reduced CO2 emissions by 96,000 tonnes per annum. Under the green belt development activities, vegetation has gone up from 20,000 trees in 2004-'05 to 80,500 in 2006-'07. Sunflowers and sugarcane are being cultivated over 206 acres of land using treated effluent with decomposed sugarcane trash as manure, and there is a tie-up with the Tamil Nadu Agricultural University to monitor and study the impact of the treated effluent on soil and ground water quality. Aquaculture too uses treated effluent.

Petax filters from Kadant (France) have been found to be particularly useful in recycling process water, the first instance of the use of this particular technology in India. Documentation includes samples of real time MIS reports, area-wise water consumption reports and the like. Knowledge sharing includes sharing within the plant, in the community and online sharing across industries through Bhadra Net.

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