Healthy Soil, Healthier Planet

biochar

carbon removal

The carbon contained in all biomass was at one time absorbed from the atmosphere as plants.

If the biomass is left to decay or burned, the CO2 returns to the atmosphere. By heating it in the absence of oxygen, pyrolysis interrupts this cycle and securely sequesters the carbon in a substance called biochar, which itself has many environmental benefits.

And the process generates heat, making the reaction self-sustaining, and the excess energy is available as a source of green energy.The process is therefore an engineered carbon removal technology.

Innovating for a

Sustainable Future

We emphasise innovation and sustainability in creating high-quality biochar products that improve soil health and plant growth.

Our approach goes beyond manufacturing, as we collaborate with various environmental specialists to optimise biochar's use. By increasing capacity ourselves, and encouraging others in various sectors to adopt the technology, we can significantly contribute to a more sustainable, carbon-neutral future.

Our mission is to foster a greener, more sustainable world, with every biochar delivery bringing us closer to this goal.

Is biochar

Sustainable?

Yes! Biochar is considered a sustainable product for the following reasons:

1) Carbon Sequestration – Biochar locks away carbon in a stable form for hundreds to thousands of years, preventing it from re-entering the atmosphere as CO₂. Through pyrolysis, roughly 50% of the carbon that would otherwise be emitted is saved and stored.

2) Soil Improvement – Biochar enhances soil fertility, improves water retention, and supports microbial life, reducing the need to produce and apply chemical fertilisers.

3) Waste Reduction – Biochar is made from biomass waste (feedstocks include arboricultural waste, AD Digestate and poultry litter), turning waste into a valuable and environmentally responsible resource.

4) Renewable Production – If produced using sustainable biomass sources and self-sustaining pyrolysis (low-oxygen heating), producing biochar can be carbon-negative.

Biochar as part of a

Peat-free solution

Emissions produced by peat extraction in the UK since 1990 are equivalent to 15 million return flights from London to New York (based on emissions from a return flight amounting to 2 tonnes CO2e).

Peat extraction releases stored carbon into the atmosphere, contributing to climate change. It also contributes to the destruction of unique ecosystems, threatening biodiversity and displacing species that depend on these habitats. These adverse effects have driven the call for sustainable, peat-free solutions. Biochar, with its moisture and nutrient retention capabilities, as well as its ability to sequester carbon, is being increasingly turned to as part of the peat-free solution.

Our

Commitments

Onnu's commitment to environmental restoration is reflected from our alignment with key Sustainable Development Goals (SDGs). Our operations are optimised for environmental outcomes: