Grey water recycling

Jaya Rayaprolu's Bengaluru home harvests 1.3 lakh litres of rainwater, recycles 800 litres of grey water daily, and uses solar power, creating a self-sufficient and zero-waste living space.

Ajit Gokhale's reed bed system can be installed anywhere, from housing societies and educational institutions to companies and villages. Its capacity to treat water? From as low as 500 litres/day to 15,00,000 litres and even more!

The project was selected in the first phase of a Smart India Hackathon--Hardware edition--where more than 600 teams participated. The students also won a cash prize of Rs 50,000.

When T. Siva Ramalingam had moved to the city sometime in the early 2000s, he found that not only was Chennai sweltering hot; there were also very few trees and plants in the surrounding areas that further aggravated the heat.