The Maha Kumbh Mela, held every 12 years in Prayagraj, India, is renowned as the world's largest religious gathering. In 2025, this monumental event attracted an estimated 663 million devotees between January 1 and February 6, culminating in a significant environmental challenge: the generation of approximately 20,000 tons of waste.
Scale of Waste Generation
During the peak of the festival, over 15 million pilgrims visited daily, leading to the production of nearly 16 million liters of faecal sludge and 240 million liters of greywater each day. This massive influx necessitated the development and implementation of advanced waste management strategies to maintain environmental sanctity and public health.
Innovative Waste Management Strategies
To address this unprecedented waste generation, authorities employed a combination of traditional practices and cutting-edge technologies:
Hybrid Granular Sequencing Batch Reactor (HGSBR): Developed collaboratively by the Indian Space Research Organisation (ISRO) and the Bhabha Atomic Research Centre (BARC), the HGSBR is a compact biological treatment system that utilizes natural microbes to effectively remove contaminants from wastewater. This technology was deployed in three prefabricated faecal sludge treatment plants, ensuring efficient processing of human waste.
Geotube Technology: Analogous to a giant tea bag, Geotubes are containers filled with a slurry mix of sand and water. The hydraulic pressure facilitates the separation of water through the permeable fabric, leaving contaminants contained. This method was instrumental in treating large volumes of liquid waste, ensuring that only clean water was reintroduced into the environment.
Bioremediation: This traditional technique employs beneficial microorganisms to break down pollutants in wastewater. At the Maha Kumbh, approximately 75 large ponds were utilized for bioremediation, allowing bacteria to decompose waste into nutrients and organic matter, thereby facilitating the recycling of polluted water.
Comprehensive Sanitation Measures
Beyond technological interventions, extensive sanitation measures were implemented:
Portable Sanitation Facilities: Over 150,000 portable toilets, equipped with jet spray cleaning and scientific odor neutralizers, were strategically placed across the 4,000-hectare festival area. These facilities were regularly cleaned to ensure accessibility and hygiene for all visitors.
Waste Collection and Disposal: A fleet of 1,000 vehicles, including 120 GPS-enabled tipper trucks and 40 compactors, operated around the clock to collect and transport waste. Daily, approximately 400 metric tonnes of trash were collected and processed, amounting to over 11,000 tonnes throughout the festival.
River Cleanliness Initiatives: Specialized trash skimmers were deployed to remove floating waste from the rivers, collecting 10-15 tonnes daily and up to 20-25 tonnes on peak days. This effort resulted in the collection of 600 tons of floating waste, maintaining the sanctity of the water bodies.
Community Engagement and Sustainability Efforts
Public participation played a crucial role in maintaining cleanliness:
Awareness Campaigns: Authorities conducted widespread publicity and educational initiatives to promote sanitation-conscious behavior among devotees and locals.
Volunteer Involvement: A workforce of 15,000 sanitation workers, supported by volunteers, ensured continuous cleaning and waste management across the festival grounds.
Ban on Plastics: To reduce environmental impact, a total ban on plastic bags, utensils, and bottles was enforced, promoting the use of biodegradable alternatives such as dona-pattal (leaf plates) and earthen cups.
Conclusion
The successful management of approximately 20,000 tons of waste during the Maha Kumbh 2025 exemplifies a harmonious blend of faith, technology, and environmental responsibility. The integration of advanced waste treatment technologies, comprehensive sanitation measures, and active community engagement set a new benchmark for sustainable practices in large-scale events, ensuring the preservation of natural resources for future generations.
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