50 Water conservation initiatives Reducing freshwater consumption & reutilising rain water Our water conservation initiatives such as recycling of RO permeate in cooling towers, introduction of heat exchangers in the vent lines of vacuum pumps, drip irrigation system to conserve water for green belt usage, cleaning of ZLDS equipment with recycled water, installation of spray balls systems for reactors cleaning and HP pumps for descaling, filters and receivers cleaning etc., led to reduction of 12% specific water consumption. In Year 2021 and 2022, at Unit-4, Bidar, the capability to collect, treat and re-use rainwater was 25% to 33% of the potential volume. Actions Taken • Entire rainwater drain network system was cleaned to collect rainwater effectively in the storage tank • Pre-treatment system was installed for treating collected rainwater at a cost of Rs. 8 lacs • A dedicated storage tank was allotted in existing ETP area to collect the pre-treated rainwater before using for Utilities • Existing old Reverse Osmosis plant was revamped for further treatment of pre-treated rainwater Impact Water Resource Conservation: By using treated rainwater for utilities (cooling tower), total fresh water (ground water) consumption was reduced by 39%. • Cost reduction in fresh water: Total 4039 KL of rainwater collected and treated in the last 3 years leading to savings of Rs. 3.35 lacs. • Treatment capacity expansion: After installation ofrainwater pre-treatment system, capacity of treatment expanded from 33% to 66%. • Sustainability Development Goals (SDG): The actions support the organisation’s SDG goal of reduction of fresh water consumption by 10%. It is expected that collected rainwater will be utilised upto 100% by FY 24 at Bidar unit. At Sai, we have recognized the importance of water stress assessment as an integral part of our environment dependencies. In this effort, we have performed the water stress assessment for each company facility and for all key supplier’s locations based on IPCC AR6 scenarios, focusing on the 2030 and 2050 time horizons, enabling us to prepare risk mitigation plans for location(s) in the value chain where water stress is identified critical. Water stress has multiple impacts: a) Loss of sales due to operational disruptions caused by unavailability of water (for water intensive processes) - both internal and for supplier materials b) Higher water costs due to scarcity The water risk assessment has been conducted for the various facilities of Sai and also for few of our suppliers. It is conducted by considering 3 scenarios and between 2030 to 2050 by using WWF Biodiversity Risk filter and WRI Aqueduct. Rain water treated (KL) FY 21 FY 22 FY 23 FY 24 890 1068 2346 5037
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