Water management is a top priority in the materiality matrix of STL and is also one of its UN SDG goals of ‘Water Positivity by 2030’.
October 20, 2022
STL has announced that all of its Indian manufacturing facilities are now Zero Liquid Discharge (ZLD) certified by the leading ISO certification body Deutsch Quality Systems (DQS India). This is a great milestone for STL in its UN SDG goal of – ‘Water Positivity by 2030’.
It has been calculated that India presently has only 4 percent of the world’s freshwater reserves while the demand is expected to grow by over 70 percent by 2025. At STL, water management is a top priority in its materiality matrix which has led to developing water-resilient communities, and undertaking rainwater harvesting & technology interventions to optimise water demand as per ZLD protocols, according to the press release.
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The water management process is carried out through Sewage (STP), Effluent Treatment (ETP), and Multi-effective Evaporator (MEE) plants, at the Company. The ZLD process also includes an in-depth understanding of the liquid waste profiles and in-plant modifications to minimise water usage. After chemically treating the wastewater to remove chlorine and solid particles, there’s a three-tiered centrifugation performed to remove salt and suspended particles, making it fit for reuse in boilers and scrubbers. The process is digitally monitored using a Supervisory Control and Data Acquisition (SCADA) architecture and shift dashboards.
Commenting on the achievement, Ms. Akanksha Sharma, Global ESG Head, STL, said, “Water conservation and re-usage is top of the agendas of the companies committing to sustainable business practices. The ZLD certification for all our manufacturing locations in India depicts our conviction that with the right technical innovation, intent, and ecological foresight, it is possible to conserve water and put it to re-usage while operating sustainably.”
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STL has implemented this ZLD framework for all six manufacturing plants across Aurangabad and Silvassa, in Maharashtra, India. A combination of relevant initiatives has enabled the Company to recycle over 45,000 m3 of wastewater from manufacturing in FY22 across all its manufacturing facilities.
