Affordable biochar plants to
make projects a reality
Every aspect of our pyrolysis plants are designed to maximize ROI
while delivering the highest standards of quality and reliability.
3 years
typical payback time
for our clients
850kg/hr
high capacity to
increase returns
4 months
time from purchase to biochar production


CarboFlow -
A new approach for the biochar industry
Capitalizing on our experiences as a project developer, we have first-hand experience of what is required to make pyrolysis projects truly viable. High CAPEX, low capacity and long lead times can all stop projects getting off the ground.
Innovations in design, manufacturing and installation have all kept costs down so we can offer high quality plants at a price our new and important industry can afford.
The result is a lower cost, high-capacity, end-to-end pyrolysis plant that delivers increased environmental and financial returns.
Plant packages
Focusing solely on a pyrolysis unit is only a part of what will make your plant successful. Fit-for-purpose feeding, energy management and discharge, and can be a major part of your total costs.
We offer standard, proven equipment to keep costs down while ensuring smooth operation and reliability.

Self assembly
Many developers have their own competent teams or local partners who can assemble and install the various equipment, saving costs on engaging overseas suppliers to do everything.
We can deliver our equipment with all the parts and clear guidance on the remaining activities to empower clients to deliver their plant in the most efficient method for them.

Business model
Our Green Hub carbonization plants all operate on a simple yet highly effective business model:
Inputs
Biomass
Feedstock can come from many organic sources.
Pyrolysis

CarboFlow
Feedstock is thermally decomposed into biochar and syngas, which is combusted for energy to maintain the process and power any required drying process.
Outputs
Heat & electricity
Excess energy can be delivered as hot air, water or steam, and co-generation of electricity.
Biochar
Biochar can be used as a soil amendment, storing carbon for thousands of years.
Carbon credits
Carbon removal credits can be sold for income, or retired to reduce your own emissions.


Pyrolysis for
global deployment
Onnu began as pyrolysis project developers, and across many regions of the world found that access to finance and commercial requirements were a significant barrier to widespread deployment.
In 2024 we created our engineering division with a single goal - to create an offering that would be affordable and commercially viable to those wanting to scale carbon removal.
How have we done this? Simplicity of design, standardization of parts, Asian manufacturing partner and options for self-assembly.
This means more commercially viable projects without impacting reliability and quality.
Working with the leading carbon registries
We have ongoing relationships with the world's leading carbon registries, including Isometric, Puro.earth and Rainbow, including the ability to feed required production data to ensure smooth issuance of credits.
This means full compliance with whichever registry you choose.

