New Delhi has installed India’s first microalgae-based PureAir Tower along the Aerocity highway corridor, introducing a biotechnology-driven approach to tackle urban air pollution. Positioned on a busy road median, the tower transforms conventional road infrastructure into an active air purification system. This pilot initiative targets vehicular emissions along one of the city’s busiest traffic corridors.
How the Microalgae Air Tower Works
Unlike traditional smog towers that rely on mechanical filters, this system uses photosynthetic microalgae to absorb pollutants directly from the surrounding air. It captures carbon dioxide, nitrogen oxides, and particulate matter at street level. Through natural biological processes, these pollutants are converted into oxygen and algal biomass. The tower operates with minimal energy use and generates no secondary filter waste, making it a sustainable solution for urban air quality.
Organizations Behind the Project
The Delhi PureAir Tower was developed through collaboration among multiple organizations. The project was executed by C P Arora Private Limited in partnership with Carbelim Pvt Ltd, a climate tech start-up incubated at IIT Madras and supported by IIM Lucknow’s Enterprise Incubation Centre.From Road Divider to Carbon Sink
The PureAir Tower converts passive road infrastructure into an active environmental tool. Each tower provides an air purification effect equivalent to over 15 mature trees, continuously treating emissions from passing vehicles. The project also plans to introduce BioDivider panels, which turn road dividers into continuous green corridors, further enhancing the city’s air quality.
