The University of Mumbai (MU) has launched an earthworm-based sewage treatment project at its Vidyanagari complex in Kalina. The project aims to treat 1,200 litres of sewage per hour as part of the Mumbai Climate Action Plan.
The earthworm-based treatment method shows impressive removal rates. This method's biochemical oxygen demand (BOD) and chemical oxygen demand (COD) removal rates range from 80–90% and 70–80%, respectively.
Earthworms play a crucial role in this treatment process. They act as biofilters, enhancing the population and metabolism of microorganisms by chopping, crushing, grinding, and aerating substances. This results in an effluent that is nutrient-rich and suitable for reuse.
This concept was developed by Absolute Water Private Limited. It was selected from a start-up competition held six months ago. The competition aimed to find natural solutions to complex problems and involved 11 young participants.
The World Resources Institute (WRI) played a significant role in the project's development. It also selected the Vidyanagari Complex as the pilot location for the plan.
The project recycles 10,000 to 12,000 litres of treated wastewater daily for university irrigation needs. Similar upgrades are being planned for other university complexes.
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