IIT Grad Hasn't Bought Cooking Gas in 7 Years Using Waste

For seven years, Priyadarshan Shahastrabuddhe hasn't paid for cooking gas. Instead, he powers his kitchen using fuel made entirely from his neighbor's vegetable peels and food scraps.

The IIT graduate built a biodigester called Vaayu that sits quietly in his kitchen, transforming waste into energy. Each day, it processes 11 kilograms of organic scraps and produces 800 liters of cooking gas.

The system works through natural processes. Kitchen waste goes into the biodigester tank, where bacteria break down the organic matter and release methane gas. That methane flows into a storage balloon, which connects straight to his stove.

Since 2019, Priyadarshan has avoided buying LPG completely. His biodigester has converted over 1,000 tonnes of kitchen waste into usable fuel during that time.

The solution addresses a problem most families never consider. We throw away food scraps, then pay for cooking gas when those same scraps could produce fuel for free.

Priyadarshan designed Vaayu to make this process accessible to everyone. The system requires no special training and works like a regular gas connection once installed.

The potential impact is enormous. Every person in India generates about 55 kilograms of food waste annually. Converting even part of that waste into fuel could reshape how households think about both garbage and energy.

The Ripple Effect

Priyadarshan began sharing his innovation with canteens, hotels, and housing societies across India. Today, more than 350 homes use the Vaayu biodigester system.

Together, these households save an estimated 2,500 LPG cylinders every year. They're cooking meals, boiling water, and preparing tea using fuel that would have otherwise rotted in a landfill.

The system flips a wasteful habit on its head. Instead of paying to throw away food and paying again for cooking fuel, families can solve both problems at once.

What started as one engineer's kitchen experiment has become a practical alternative for hundreds of families seeking energy independence and environmental solutions.

One neighbor's scraps now power another family's meals, proving that waste isn't really waste until we decide to throw it away.