Rotary Kiln for Biochar Production: Carbon Locked in the Soil
Rotary Kiln Biochar
Biochar is biomass heated in the absence of oxygen until only a stable, carbon-rich solid remains, and a rotary kiln is one of the best-proven ways to make it. The kiln pyrolyses wood or agricultural waste into biochar that can lock carbon in soil for centuries, while producing combustible gases that can be recovered for energy.
How Biochar Is Made
Biomass is fed into an indirectly heated rotary kiln and raised to pyrolysis temperature without oxygen. Volatile gases are driven off and can be burned to heat the kiln or generate power, while the solid that remains in the drum is biochar. The kiln’s controlled temperature and residence time set the biochar’s quality, surface area and carbon content.
Why Biochar Matters
Biochar has a dual value. Added to soil, it improves water and nutrient retention and holds carbon that would otherwise return to the atmosphere as the biomass decomposed. Burned as a fuel, it provides renewable heat and power. That combination of carbon removal and energy production is what has made biochar a fast-growing part of the carbon-credit and regenerative-agriculture markets.
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Make Carbon Work for the Soil
Klean Industries delivers biochar systems producing carbon removal and renewable power together, including a Japan plant producing roughly 1,000 tonnes of biochar a year.
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