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In 2019, we completed the implementation of a very significant Zero
Liquid Discharge (ZLD) system at our largest site in India at Ambasamudram,
This site consumes approximately 3,500 tonnes of water per day, which
previously was treated and discharged into the environment. To achieve zero
liquid discharge, the existing wastewater treatment plant was modified to
incorporate new cutting-edge technology, including ultrafiltration, reverse
osmosis and multi-effect evaporators. As a result around 95% of the water
entering the treatment plant is returned for reuse in the factory and the
remaining 5% is evaporated to leave a solid waste, which is used as a
cement additive by a local cement company. The steam required for the
new evaporators is generated using biomass, ensuring carbon neutrality
for this process.
In February 2019, we successfully closed down our treated wastewater
discharge channel in a ceremony witnessed by the Tamil Nadu Pollution
Coats Ambas - One of our largest, most advanced and most sustainable sites