CarboFlow
CarboFlow is Onnu's proprietary carbonization machine - designed and engineered with the aim to make pyrolysis commercially viable for more projects.

Why choose CarboFlow?
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.
Pyrolysis with ambition
CarboFlow uses an upright design where airflow keeps the lower carbonization chamber oxygen-free while syngas is combusted above, radiating heat downwards.
As an experienced project developer, Onnu understands that pyrolysis operations need to stack up financially. By increasing throughput, harnessing advanced automation and capturing green energy, plants using our technology can run efficiently and reliably which all leads to a financially sustainable operation.

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.
Typical process flow

CarboFlow's features
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 CarboFlow installs
Whole plant solutions
Onnu can design and deliver the entire plant from feedstock in, to biochar out, adhering to the highest standards throughout.
This can include walking floors, conveyors, dryers, feed systems, heat exchangers, ORCs, scrubbers, cyclones and bagging systems as your project requires.
Extended Service Agreement
We have designed CarboFlow to ensure simplicity and practicality for clients to manage themselves. If you want to extend our involvement, beyond a standard warranty, our service package includes:
- All spares and fitting
- Pre-planned maintenance visits
- Remote monitoring
- Support hotline
- Performance guarantees

Sustainable development goals
Pyrolysis operations contribute to 8 of the 17 sustainable development goals (SDGs).








Want to discuss your pyrolysis project?
Our team can advise on site layout, feedstock viability, and how CarboFlow can help you
achieve your commercial and sustainability goals.








