In Southeast Asia, where agriculture drives much of the region’s economy, a silent problem often goes unnoticed: what happens to the mountains of agricultural waste left behind after every harvest? Most of it is burned or left to rot, releasing carbon into the atmosphere and polluting the air. But a new generation of climate-tech innovators is turning this problem into a powerful climate solution.
Among them is WasteX, a young startup founded in 2022 with a bold goal to help farmers turn waste into wealth through biochar technology. Operating mainly in Indonesia and the Philippines, WasteX offers a full-service model that converts agricultural residues such as rice husks, corn cobs, and sawdust into biochar, a carbon-rich material that improves soil health and stores carbon for centuries.
From Waste to Biochar
At the heart of WasteX’s solution is a compact carbonizer unit that can be deployed directly at farms or mills. Farmers feed their leftover biomass into the system, which heats the material in a low-oxygen environment to produce biochar. The resulting black, porous substance can then be applied to soils, boosting fertility and water retention while reducing the need for chemical fertilisers.
In pilot projects across East Java, farmers saw crop yields jump by up to 69 percent, while fertiliser use dropped significantly. These results are not just agricultural wins; they show how circular economy thinking can directly enhance livelihoods and climate resilience.
Climate Tech Meets Carbon Markets
Beyond improving soil health, WasteX’s model also contributes to climate mitigation. The biochar produced effectively locks away carbon that would otherwise be released through open burning. Because this process can be verified and measured, WasteX is able to generate carbon credits under the Global Artisan C-Sink standard, creating an additional revenue stream for farmers.
This approach, blending hardware, digital monitoring, and climate finance, reflects a new kind of sustainability innovation emerging across the region. By providing both the technology and the operational know-how, WasteX lowers the barriers for smallholders to participate in the carbon economy.
In 2024, WasteX produced 500 kilograms of biochar in a single day and secured US $450,000 in funding from the P4G Partnerships initiative to expand across Southeast Asia. With a vision to help one million farmers raise their income and remove 10 million tonnes of CO₂ by 2035, the company shows how sustainability can be both practical and profitable. By turning agricultural waste into value, WasteX demonstrates how innovation rooted in local needs can create lasting climate impact.
Image courtesy of WasteX.
