York House, York Road,
Maidenhead, SL6 1SF,
We deliver clean energy, while capturing carbon, manufacturing biochar and investing in local circular economies.
By 2025 we aim to be annually delivering:
of clean, affordable
Onnu was founded in the UK In 2021 as a consultancy advising African organisations on how to initiate and structure projects that would qualify for carbon credits. As part of this work, members of the Onnu team spent time onsite in Southern Africa.
Onnu conducted an emissions reduction report for Namid Mills – Namibia’s largest corporation – which identified waste biomass as an area of concern. Exploring the solutions to this problem led to a detailed examination of pyrolysis. This was the point when the Onnu team began to see the potential of biochar – as both a carbon capture technology and a key component of sustainable farming.
Meanwhile, the UK Environment Agency had published a new guidance on land-spreading, which effectively outlawed the practice. This presented a huge problem for UK agriculture for which biochar was the most viable, sustainable solution.
Recognising the value of their expertise in pyrolysis and biochar, the Onnu team then relocated back to the UK and the company began to take its current form – advising on and building pyrolysis-based green energy hubs in a variety of industry sectors.