Our  vision

We aim to realise the potential of biochar to facilitate the transition to a Net Zero economy. We will achieve this by creating a pyrolysis-based Greentech industry that ensures waste biomass is processed in ways that are affordable, readily available – and acceptable to the public and the regulatory authorities.

The first significant milestone in the achievement of that ambition will be to build 100 pyrolysis-based energy hubs over the next decade. As an interim step, we have set ourselves the following targets by 2025. By ensuring the sustainable management of waste biomass, we will be helping to deliver on what the world needs most - substantial and scalable carbon removal.

Our targets

We deliver clean energy, while capturing carbon, manufacturing biochar and investing in local circular economies.

By 2025 we aim to be annually delivering:

10MW

of clean, affordable
energy generated

25kt

of waste
diverted

7kt

biochar
manufactured

10kt CO2

of carbon
removed

Our Story

Our story

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.

Green energy

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.

Our team

Giles Welch
CEO
Giles Welch
CEO
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Seb Burn
Head of Engineering and Product Development
Seb Burn
Head of Engineering and Product Development
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Hélèna Theseira
Chief Operating Officer
Hélèna Theseira
Chief Operating Officer
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Michael Douglas
Chief Revenue Officer
Michael Douglas
Chief Revenue Officer
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Dinara Dassanayake
Sustainability Consultant
Dinara Dassanayake
Sustainability Consultant
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Tejas Rajput
Sustainability Consultant
Tejas Rajput
Sustainability Consultant
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Ciaran Nestor
Sustainability Consultant
Ciaran Nestor
Sustainability Consultant
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Oliver Lewis
Business Development Manager
Oliver Lewis
Business Development Manager
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Stuart Caley
Head of Biomass Sourcing
Stuart Caley
Head of Biomass Sourcing
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Sarah Copland
Finance Manager
Sarah Copland
Finance Manager
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Paul Stewart
Land Acquisition Specialist
Paul Stewart
Land Acquisition Specialist
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Jon Lee
Advisor
Jon Lee
Advisor
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Glynn Chambers
Non-Executive Director
Glynn Chambers
Non-Executive Director
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Iain Halpin
Head of Communications
Iain Halpin
Head of Communications
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We're hiring

Our locations

Maidenhead picture

Head Office

Address

York House, York Road,
Maidenhead, SL6 1SF,
United Kingdom

Map featuring engineering location.

Engineering

Address

Caebardd, Guilsfield,
Welshpool, Powys,
SY21 9DJ

Malaysia

Address

A-29-8, Menara UOA Bangsar, Jalan Bangsar Utama 1, Bangsar 59000, Kuala Lumpur

Latest insights

Characteristics of good feedstocks for pyrolysis

Characteristics of good feedstocks for pyrolysis

Feedstocks

Biomass pyrolysis delivers remarkable environmental benefits in terms of carbon sequestration, green energy and of course the biochar it produces. However, as with most things in life, what you get out depends on what you put in, and the choice of feedstock is crucial to ensure these benefits are delivered.

Read more
Characteristics of good feedstocks for pyrolysis
Onnu Biochar open for business!

Onnu Biochar open for business!

Biochar
Company

Announcing the launch of our biochar marketplace, Onnu Biochar for trade and commercial sales of our growing biochar supply.

Read more
Onnu Biochar open for business!
Onnu opens Kuala Lumpur office

Onnu opens Kuala Lumpur office

Company

We are delighted to announce that we are opening an office in Kuala Lumpur! After working on a number of exciting projects in Malaysia and SE Asia, it's time to build our local presence as we move to implementation mode.

Read more
Onnu opens Kuala Lumpur office

Let's talk