World Environment Day: Indian Oil showcases green sewage treatment technology at Haldia Refinery

New Delhi: State-run Indian Oil Corporation Limited (Indian Oil) on Friday showcased the successful operation of a first-of-its-kind Green Sewage Treatment Plant (STP) based on Integrated Wetland Technology (IWT) at its Haldia Refinery, highlighting the initiative as a key milestone in its sustainability journey.

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The plant, which has been operational since January 26, was featured through an audio-visual presentation released by Arvind Kumar at Indian Oil's Refineries Headquarters in New Delhi on the occasion of World Environment Day.

Developed in collaboration with Society for Innovation & Entrepreneurship and Indian Institute of Technology Bombay, the Green STP uses wetland vegetation, natural filtration media and microbial processes to treat sewage, eliminating the need for energy-intensive conventional treatment systems.

According to the company, the facility has demonstrated strong performance over more than four months of operation, delivering lower power consumption, significantly reduced greenhouse gas emissions and near-zero maintenance requirements. The treated water generated by the plant is being reused for horticultural purposes.

Indian Oil said the successful implementation of the project has established the viability of the technology and opened avenues for its replication across the company's refinery network. The Refineries Division plans to expand the model to other refineries, enabling environmental benefits to be scaled up across multiple locations.

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In another sustainability-focused initiative, the Refineries Division announced a pilot programme for recycling end-of-life Inherently Flame Retardant (IFR) suits used by refinery personnel. The programme aims to promote circular economy principles by recycling used protective apparel instead of disposing of it as waste.

As part of the World Environment Day celebrations, Arvind Kumar also unveiled specially designed theme posters aimed at reinforcing environmental responsibility and sustainability awareness among employees and stakeholders.

The initiatives underscore Indian Oil's efforts to integrate innovative and nature-based solutions into its operations while advancing resource efficiency, waste reduction and environmental stewardship across its refining business.

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