Sterlite Industries India Limited, Silvassa, undertakes water conservation efforts as a corporate initiative (2007)

This presentation describes the efforts undertaken by Sterlite Industries India Limited, Silvaasa at water conservation and management. Sterlite, a subsidiary of the London-listed metals and mining major Vedanta Resources Group is a leading producer of electrolytic grade copper in India.

Their water conservation documentation is particularly interesting because it provides a lot of specific details of savings brought about by individual process modifications and presents results in terms of both physical and financial savings.

Initiatives include:

• Modification in the thermosyphon cooling water arrangement,
• Condensate recovery of RVD for filter press backwashing
• Process modification in the leaching section to reduce steam consumption
• Modification of nozzles in ASWM for better drying & reduction in water consumption
• Reuse of collected condensate water generated by anode casting cooled water
• Rainwater harvesting
• Conversion of gland packing pumps into mechanical seal
• Provision of electrolytic cell covers in the refinery and the use of a lube cooled heat exchanger for compressors with recirculation.

An interesting statistic that highlights the good business sense of these measures is that for a total of Rs.1.55 million spent on them, no less than Rs. 1.15 million, or in other words nearly 75% of the investment is recovered in the form of savings.

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