Clarke Energy commissions its maiden biogas project in India

Rehlko owned subsidiary Clarke Energy has announced the commissioning of its first membrane-based biogas upgrading plant in India. The biogas plant is located at a municipal solid waste anaerobic digestion site operated by Srinivas Waste Management Services Private Limited (SWMS) in Chetpet, Chennai, Tamil Nadu.

The announcement comes in parallel with this week’s UK-India trade delegation. Clarke Energy has operated in India for 30 years, having installed almost 2GW of low carbon, renewable and resilient power across India and Bangladesh and is a success story in UK-India business collaboration.

The SWMS site processes biodegradable organic food waste from the surrounding region, converting it into biogas and soil improver—delivering meaningful sustainability benefits to the local community.

This project supports SATAT Scheme, which aims to establish 5,000 bio-CNG plants nationwide. Clarke Energy says that the membrane-based upgrader offers a scalable, efficient, and locally manufactured solution to meet these ambitious targets.

Building on the company’s 30-year presence in the Indian biogas sector, the new system replaces a pressure swing adsorption (PSA) unit with a membrane-based purification system capable of upgrading 600 Nm³/hr of raw biogas into high-purity biomethane.

The integrated solution includes a biogas dryer, scrubber, low-pressure compressor, two-stage membrane separation system, and complete instrumentation and interconnection piping. Key components were sourced locally, ensuring competitive delivery timelines and sustainability benefits. Initial commissioning results confirm the system is meeting guaranteed performance levels at part load, with methane purity exceeding 97.4%, while minimizing methane losses.

“This project marks the first biogas upgrader system fully designed, developed, and manufactured in India by Clarke Energy. It’s a significant milestone for our Indian operations by demonstrating how we’re combining international expertise with local execution to deliver state-of-the-art renewable gas solutions that support India’s clean energy future,” said Kyle Quinn, President, Clarke Energy.

Unlike conventional PSA systems, Clarke Energy’s membrane-based upgrader offers higher methane recovery, potentially lower operational costs, and modular scalability – making it ideal for urban waste-to-energy applications.

As a strategic platform for sustainable infrastructure, Rehlko drives the development of high-impact, regionally tailored solutions through its portfolio companies. This project reflects Rehlko’s strategic focus on scalable clean energy systems, local manufacturing ecosystems, and community-centered sustainability outcomes.