A pioneering project is taking shape in the heart of Kerala’s capital, where a new facility will soon transform sewage sludge into electricity, marking a major step forward in sustainable waste management.
Local Self-Government Department (LSGD) Minister M. B. Rajesh inaugurated the construction of the ₹36-crore Omni Processor at the Muttathara sewage treatment facility. The project is being fully funded by the Bill & Melinda Gates Foundation, established by Microsoft founder Bill Gates and Melinda French Gates.
Tackling a Long-Standing Sludge Management Challenge
Thiruvananthapuram houses Kerala’s only extensive sewer system, channelling wastewater from residential and commercial areas to the 107 million litres per day (MLD) Muttathara treatment facility. Around 90–100 trucks deliver faecal sludge daily, but despite its scale, the plant has long grappled with a critical challenge: sludge disposal.
Currently, the facility uses the Activated Sludge Process (ASP) — a system involving screening, aeration tanks, clarifiers, sludge thickeners, drying beds, and chlorination units — to treat 55–65 MLD of sewage, including faecal sludge. However, 5–8 tonnes of sludge accumulate every day, often dumped on-site due to limited demand, creating significant environmental and operational issues.
Omni Processor: A Sustainable Solution
The newly launched Omni Processor aims to solve this persistent problem. A decentralised thermal waste treatment system, it destroys pathogens while recovering valuable resources from faecal sludge, biosolids, and other waste streams. In the process, the plant generates electricity to power its own operations, while also producing treated water, distilled water, and ash as useful by-products.
The Muttathara plant will treat 10.7 million litres of sewage daily, continue processing wastewater through the ASP system, and divert solid sludge to the Omni Processor to convert it into electricity. “This means the plant will not only generate all the electricity it needs to operate but will also eliminate the remaining sludge completely,” the minister said.
A Leap Forward for Kerala’s Waste Management
Officials and experts are hailing the project as a significant milestone in Kerala’s waste management journey. Construction is expected to be completed by March next year, after which the facility will begin operations.
As reported by money.rediff.com, the minister credited the active intervention of the state government and the Swachh Bharat Mission for bringing this groundbreaking project to Kerala. The WASH Institute, which provides technical assistance to the Swachh Bharat Mission, helped shift the initiative from Hyderabad to Thiruvananthapuram.
