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Current Affairs

Smog tower

Date: 06 January 2020 Tags: Miscellaneous

Issue

Gautam Gambhir, former cricketer and  MP from East Delhi,  inaugurated a prototype air purifier at Lajpat Nagar in the national capital.

 

Background

In November, the Supreme Court had directed the Centre and the Delhi government to prepare a plan to install ‘smog towers’ across the capital to deal with air pollution.

 

Details

  • Smog towers are structures designed to work as large-scale air purifiers. They are usually fitted with multiple layers of air filters, which clean the air of pollutants as it passes through them.

  • The smog tower is capable of treating 6,00,000 cubic metres of air per day and can collect more than 75 per cent of particulate matters (PM) 2.5 and 10. After the cleaning, the tower releases clean air.

  • Large-scale air filters shall draw in the air through fans installed at the top before passing it through the filters and releasing it near the ground.

  • The filters installed in the tower will use carbon nanofibres as a major component and will be fitted along its peripheries. The tower will focus on reducing particulate matter load.

  • The project is a collaboration between the Indian Institute of Technology (IIT) Bombay, IIT-Delhi and the University of Minnesota, the latter having helped design a similar tower of over 100 metres in China’s Xi’an city. 

Other similar installations

  • China, which has been battling air pollution for years, has two smog towers,  in its capital Beijing and in the northern city of Xi’an.

  • The Xi’an tower is dubbed the world’s largest, and has reportedly brought down PM 2.5 by 19% in an area of around 6 sq km in its vicinity.

  • The tower has produced 10 million cubic metres of clean air every day since its launch, and on severely polluted days, is able to bring down smog close to moderate levels.

  • The tower in Beijing, has been able to compress the carbon waste generated during purification to produce gemstones.