Our approach
Our patented process leverages iron as a reusable carrier in three simple, yet revolutionary steps to transform biogas into valuable biomethane, all without harsh chemicals or high energy demands.
Iron activation
Naturally occurring microorganisms convert iron into a reactive form under normal conditions. This vital first step requires no chemicals or heat, ensuring an environmentally friendly start to the biogas upgrading process.
CO₂ removal
Raw biogas is efficiently bubbled through our iron-rich liquid. The CO₂ reacts with the iron, temporarily becoming a solid mineral, while the methane passes through unchanged, ready for collection.
Iron regeneration
A small amount of air is introduced to reset the iron back to its original form, ready for reuse. The CO₂ is then released separately, ensuring continuous, efficient operation and a closed-loop system.
Why choose Carbon Hills
Our deep expertise in wastewater treatment is the cornerstone of Carbon Hills' approach. This unique understanding allows us to design and implement biogas upgrading systems that are not only highly effective but also perfectly suited to the specific challenges and opportunities within wastewater plants. Independent testing consistently demonstrates over 90% CO₂ removal, upgrading biogas from approximately 60% methane to over 95% methane.
To customers
Compared with conventional biogas upgrading technologies such as membranes, pressure swing adsorption (PSA), and water scrubbing, Carbon Hills offers a simpler and more cost-effective alternative.
- Lower capital cost (simpler equipment)
- Lower operating cost (low power, no consumables)
- Lower operational risk (fewer failure points)
- Better suited to wastewater plants
To investors
Working with Carbon Hills allows businesses to unlock significant new revenue streams and cost advantages.
- Sale of biomethane (pipeline injection or compressed renewable gas for transport)
- Technology licensing/equipment sales (sale of modular and service and maintenance contracts)
- Carbon and sustainability value (reduced emissions and renewable energy credits)
