Coconut shells often end up as the last element remaining after extracting water and flesh, and are usually discarded or burned. However, several startups in India approach such residues differently.
Agricultural waste, such as coconut shells and husks, rice husks, and ash from its burning, is being transformed into everything from kitchenware and gardening supplies to furniture panels and industrial materials. The main idea is to use farm waste as raw material for useful things instead of viewing it as trash.
Below are four Indian startups that are finding innovative ways to give agricultural waste a second life.
In Kerala, where coconuts are part of daily life, Maria Kuriyakose noticed the potential in what most people were simply throwing away. In 2019, she founded Thenga Coco as a small backyard experiment to turn discarded coconut shells into useful handicrafts.
Today, this women-led startup receives shells from local oil mills and temples, transforming them into bowls, spoons, soap dishes, teacups, salad bowls, smoothie bowls, plant pots, and candle holders. To maintain naturalness and suitability for daily use, the shells are polished with coconut oil instead of chemical lacquers.
Furthermore, behind these products is a story of providing livelihoods. Thenga Coco collaborates with local artisans, especially women in rural Kerala, many of whom can work flexibly from home. Thus, what starts as a discarded coconut shell can become a kitchen item, a home accessory, and a source of income.
Not only can coconut shells be utilized. After extracting fiber from the coconut husk, a fine material called coir filler or coconut sand remains. Instead of considering this residue waste, Global Green Coir from Chennai transforms it into products used by farmers and gardeners.
The company, founded by biotechnologist Aneesh Ahmed in 2014, recycles coconut husk into blocks, bricks, discs, growing bags, and pots made from coconut fiber. Coconut sand can serve as a soil-free growing medium and is used in greenhouses, hydroponics, nurseries, landscape design, and home gardening. The company has production facilities in the coconut-growing regions of Tamil Nadu and exports its products to global markets. Simply put, the material that once remained after processing coconuts can now help grow the next harvest.
What if agricultural waste didn't return to the soil but ended up in our homes? Indowud NFC uses agricultural waste, such as rice husks, to produce natural fiber composite panels that can serve as an alternative to traditional wood boards.
These panels are made from crushed agricultural husks, minerals, and polymer binders, without using wood fibers obtained through logging. They can be used for furniture, kitchen cabinets, wall cladding, doors, frames, flooring, and decorative screens. The material is designed to be waterproof, termite-resistant, and weather-resistant, making it suitable for both indoor and outdoor use. It can also be cut, drilled, screwed, and processed on CNC machines using standard carpentry tools. Thus, instead of rice husks ending their journey as agricultural waste, they can become part of a cabinet, a wall, or a piece of furniture.
Even after rice husks are used as fuel, there can be value left. Brisil Technologies from Vadodara, founded by Tamnaim Pandya and Rashmi Pandya in 2016, works with rice husk ash—the residue formed during its burning. The startup has developed a process to extract high-purity silica from this ash. This material can then be used in various industries, including tires, rubber products, footwear, paints, and coatings.
Brisil claims that its process can recover up to 70% of the silica from rice husk ash. Its commercial units are also designed to process about 50 tons of biomass waste per day. One application is in tire manufacturing, where silica can improve tire performance and reduce rolling resistance. From coconut shells turning into bowls to rice husks becoming building panels, these startups demonstrate that agricultural waste does not necessarily have to be the final destination for a material; sometimes it can be the beginning of something entirely new.