CarboFlow - Onnu's propriatory pyrolysis technology
The development and launch of our own pyrolysis technology brings us closer to our goal - scalable biochar carbon removal.
Key Features
CarboFlow sets a new standard in carbonization technology, delivering unmatched value and performance for every project. Deploying several key innovations, it has been designed to maximize biochar production and increase automation to make sites more successful.
Affordable
Projects using CarboFlow achieve payback in half the time of other projects.
Versatile
CarboFlow is able to pyrolyze a broad range of feedstocks.
High-capacity
Throughput of up to 850 kg/hr, and easily scaled up or down.
How it works
Dried biomass feedstock enters the CarboFlow carbonization unit via a dual feed auger system. Rotary valves release measured quantities of the feedstock into the lower chamber. Here, in a high temperature, low-oxygen environment, the feedstock undergoes continuous pyrolysis and is transformed into biochar and syngas.
While the biochar is quenched and discharged into bunkers, the released syngas is passed into the upper chamber where it is combusted. The green energy from the hot flue gases is captured and can power heat applications or electricity generation through ORCs. The spent flue gases are then passed through a scrubbing system to ensure no harmful emissions are released into the atmosphere.
High-Capacity Feedstock Drive
Our unique feedstock drive handles a wide range of inputs, from woodchip and forestry residues to low‑density materials like AD digestate. This versatility comes from 20 individual auger drives that agitate the feedstock for consistent flow and uniform heating. The result is a flexible system that reliably produces clean energy and high‑carbon outputs.
Green Energy Capture
Our system combusts syngas above the carbonization chamber to generate green energy with minimal losses. Wrapped in water jackets, the chamber’s excess heat is also captured as hot water. With our large pyrolysis area, we increase syngas production, closing the loop on waste and transforming every bit of biomass into valuable outputs.
Data & Automation
Designed to simplify complex industrial operations, CarboFlow combines automation, usability, and intelligent monitoring into a unified control system that enhances reliability, efficiency, and operator confidence.
A central touchscreen provides full visibility and instant control, with remote access for convenience. All process data is stored and analyzed in the cloud, enabling continuous optimization and seamless integration with your chosen MRV platform.
Monitoring, Reporting, Verification
By unifying live dashboards, AI-driven optimization, and MRV-ready data infrastructure, BioSource, Onnu's proprietary data analysis and visualization platform, transforms raw machine signals into actionable intelligence and audit-ready records. This enables our Green Hubs to run more efficiently and consistently with transparency and confidence.
Minimize footprint, maximize throughput
Designed in a rectangular chamber with two side feeders, CarboFlow is modular with all components designed to fit into two standard containers. On-site assembly is straightforward, allowing for efficient delivery and commissioning, getting projects up and running sooner.
Our Projects
Green Hub Asia
Green Hub UK
Sustainable development goals
Pyrolysis operations contribute to 8 of the 17 sustainable development goals (SDGs).
Partner with Onnu
Do you have a suitable site or feedstock for us to work with?
Are you interested in purchasing carbon credits?