In many Indian homes, kitchen waste is simply thrown away. Vegetable peels, leftover food, and scraps head straight to the bin, while families continue to depend on LPG cylinders for cooking. But one IITian has found a way to turn that everyday waste into something far more useful: free cooking gas.
For the past seven years, Priyadarshan Shahastrabuddhe hasn’t bought a single LPG cylinder. Instead, he cooks using gas generated from food waste collected from his neighbour’s kitchen.
In his kitchen sits a biodigester — a system that converts organic waste into fuel. The unit processes around 11 kilograms of food waste and vegetable peels from his neighbour’s home every day, producing nearly 800 litres of cooking gas.
Since 2019, the system has helped him avoid using LPG altogether. In the process, more than 1,000 tonnes of waste have been converted into usable fuel.
How Vaayu biodigester turns kitchen waste into cooking gas
The technology behind this is a biodigester called Vaayu, which he built to make waste-to-energy solutions simple and accessible.
Using it is straightforward. Kitchen waste is added to the biodigester tank. Inside, natural bacteria break down the organic matter and release methane gas. This methane is then stored in a gas storage balloon, which connects directly to a kitchen stove.
The result is a clean and renewable cooking fuel — one that works as a powerful alternative to LPG.
The idea also addresses a much larger issue. On average, every Indian generates about 55 kilograms of food waste each year. If even a fraction of that waste were converted into fuel, it could transform how households think about energy and waste management.
With this vision in mind, Priyadarshan has begun supplying the Vaayu biodigester to a wider range of users, including canteens, hotels, and housing societies.
Today, more than 350 homes are using the system. Together, they save an estimated 2,500 LPG cylinders every year by turning kitchen waste into cooking gas.
The concept challenges a simple but common habit. Most households throw away waste and then pay for cooking gas.
Priyadarshan has managed to turn one into the other.
Disclaimer : This story is auto aggregated by a computer programme and has not been created or edited by DOWNTHENEWS. Publisher: thebetterindia.com
