UK Office (HQ)
Address
Onnu Ltd, York House, York Road, Maidenhead, SL6 1SF,
United Kingdom
Our vision
We see biomass pyrolysis and biochar as the most accessible and scalable of all engineered carbon removal processes, thanks to its relative simplicity, and ability to support profitable business models.
To ensure this sector thrives, and can have a game-changing impact in the fight against climate change, Onnu seeks to remove barriers to scaling, both for our own business and others, to expand and grow the market.
By 2030 we will have played our part building a world where no biomass is wasted, pyrolysis routinely generates localised green energy, biochar use is widespread and biochar CDR is removing mega tonnes of CO2 from the atmosphere.
Our targets
We deliver clean energy, while capturing carbon, manufacturing biochar and investing in local circular economies.
By 2030, we aim to be delivering annually:
40 MW
of clean energy generated
40k t
biochar
manufactured
100k tCO2
of carbon
removed
Our Story
Beginnings
Onnu was founded in 2022 with the clear goal of commercialising the biomass pyrolysis industry. The technology and the climate impacts were proven, but the sector seemed dominated by smaller-scale research and grant supported projects which were not profitable or scaling.
We quickly grew the team to include sustainability experts and experienced engineers. We developed our specialism, and spent our first phase examining multiple project settings, feedstocks and engineering methods to match the scientific aspects of pyrolysis, feedstocks and locations to the business conditions necessary to make the projects a success.
Today
Onnu is now a leading project developer for biomass pyrolysis, delivering client projects in Europe and South East Asia, whilst fulfilling our own build-own-operate approach to expand biochar production.
As the industry scales, we have also launched our biochar sales platforms; onnubiochar.com for small B2B and B2C customers in the UK, and onnubioflow.com for industrial scale B2B customers.
We continue to expand in Europe and, in 2025 opened our first office in SE Asia, where we have designed and manufactured our own pyrolysis technology suitable for larger-scale implementations in the region.
Who we are
Onnu is a project developer and technology provider headquartered in the UK. Onnu develops its own pyrolysis plants, whilst also consulting and advising on plants for clients across Europe, North America & SE Asia.
Visit Onnu
Onnu Biochar is the biochar trading arm of Onnu, selling EBC-certified biochar and soil improvement products for retail customers in Europe.
Visit Onnu Biochar
Onnu Bioflow is the renewable commodities trading arm of Onnu, catering to industrial scale customers around the world.
We're hiring
Our locations
Cape Town
Address
21 Dreyer Street, Claremont,
Cape Town 7780,
South Africa
Phone
Engineering
Address
Jalan Tambun, 31150 Tanjung Rambutan, Perak, Malaysia
Malaysia Office
Address
A-29-8, Menara UOA Bangsar, Jalan Bangsar Utama 1, Bangsar 59000, Kuala Lumpur
Latest insights
Onnu Bioflow Live and Manufacturing Biochar
We are delighted to announce that Onnu Bioflow is live and manufacturing biochar and black pellets at our Ipoh site in Malaysia!
Onnu Bioflow Live and Manufacturing Biochar
Onnu Bioflow open for business!
Onnu have been in attendance at the 5th Oil Palm Biomass Conference over the past two days, as we unveiled our entrance into the Asian market with the launch of Onnu Bioflow.
Onnu Bioflow open for business!
Planning application withdrawn for our Green Hub in Herefordshire
We have made the decision to withdraw our planning application for our Green Hub project in Herefordshire, in order to focus on more beneficial projects.
Planning application withdrawn for our Green Hub in Herefordshire