Upset with LPG shortage? This engineer from Pune is making his own cooking gas at home with kitchen waste

In most Indian homes, the kitchen dustbin quietly fills up each day with vegetable peels, leftover rice, fruit skins and spoiled food. Once thrown away, the waste vanishes from sight, usually ending up in landfills where it slowly rots and releases harmful gases into the air. At a time when fuel supply disruptions and rising LPG dependence have become pressing concerns for kitchens across the country, the search for alternative sources of energy feels increasingly urgent. For Pune-based engineer Priyadarshan Sahasrabuddhe, that urgency began with a simple observation at home and a question that refused to leave him: what if everyday kitchen waste could become cooking fuel? Scroll down to read more... The Pune-based engineer and alumnus of the Indian Institute of Technology Bombay decided to search for an answer inside his own home. A few years ago, while working at his family’s business, he noticed how much leftover food was being discarded after meals. The sight stayed with him. At first, he experimented with composting to reduce the waste, but the solution felt incomplete. The organic waste still held untapped potential. As he researched further, he began exploring the science of biofuels. What he discovered was both simple and powerful: the same organic waste produced in kitchens could be broken down by bacteria to produce methane gas, a clean fuel that can be used for cooking. Instead of sending waste to overflowing landfills, households could turn it into energy. In the year 2017, a groundbreaking idea took form in the shape of Vaayu, which is a compact domestic biogas plant specifically designed to cater to the needs of ordinary households. This innovative system is capable of converting organic kitchen waste into methane gas through a natural process known as anaerobic digestion. As time passed, a growing number of households started to realize the potential benefits of this gas, which could be piped directly to their stoves for cooking. Additionally, the residual slurry produced from this process is not merely waste; it can serve as a nutrient-rich manure that is extremely beneficial for enriching the soil of plants.For Sahasrabuddhe, the journey of his innovative experiment commenced right in the comfort of his own home. By utilizing food scraps that were meticulously collected on a daily basis, his innovative biogas system started generating an impressive amount of around 800 litres of biogas each day. This substantial output was sufficient to satisfy a significant portion of his family's cooking requirements. The outcomes were nothing short of remarkable: the family was able to substantially decrease its dependence on LPG cylinders, resulting in considerable savings of several cylinders over the course of each year. However, it is important to note that the technological aspect was merely one facet of the overall challenge. The more daunting obstacle lay in the task of changing ingrained habits.In the initial phases of his initiative, Sahasrabuddhe took the time to personally visit each neighbor in his apartment complex, taking the opportunity to explain in detail the critical importance of separating organic waste from regular trash. Each morning, he would make his rounds, going door to door to remind residents about the necessity of waste segregation. On particularly challenging days, he even went so far as to collect organic waste himself from nearby trash bins, all in a dedicated effort to keep the waste segregation system operational.Over time, a sense of curiosity gradually began to supplant the initial hesitation that had previously held them back. As residents from neighboring households observed firsthand the astonishing transformation of kitchen scraps into utilizable cooking gas, they felt encouraged to get involved and actively participate. Presently, the local community collectively contributes a remarkable total of nearly 8 to 10 kilograms of organic waste on a daily basis to the system. What began as a personal initiative has quickly evolved into a small but significant movement. Thanks to his innovative startup, Sahasrabuddhe has managed to install over one hundred Vaayu units across multiple cities, including Pune, Nashik, Hyderabad, and Aurangabad. Collectively, these impressive installations possess the capability to process nearly two tonnes of food waste on a daily basis, while concurrently helping to reduce the consumption of hundreds of LPG cylinders each year.Sahasrabuddhe’s vision encompasses much more than just technology alone; it takes on a broader perspective. He has taken the initiative to organize an informal community known as Vaayu Mitra, where like-minded individuals who are passionate about sustainable living and effective waste management can gather and share ideas. This particular group motivates households to embrace biogas solutions as a viable option and provides training for waste collectors to efficiently operate these systems. This effort contributes to transforming them into local sources of energy supply. For Sahasrabuddhe, the underlying message is both straightforward and profoundly impactful. He emphasizes that organic waste should not simply be seen as refuse that needs to be thrown away; rather, it is a valuable resource that is ready and waiting to be acknowledged and utilized.In a country where landfills continue to grow and air pollution remains a pressing concern, small household solutions may not solve the crisis entirely. But they can begin to change the way people think about waste.For Sahasrabuddhe, the pivotal change in mindset that she passionately advocates for signifies the very core of what genuine transformation truly encompasses. Every single kitchen scrap that is skillfully repurposed into a valuable source of fuel serves as a compelling symbol and a moving reminder of a significant truth: the journey towards environmental change does not necessarily demand sweeping policies or revolutionary technologies. In fact, more often than not, it commences in a more subtle and intimate way within the familiar confines of a household kitchen, triggered by an individual who possesses the courage to pose a simple yet profoundly significant question regarding the items we opt to discard.