Explanation:

Floating Treatment Wetland was inaugurated on World Wetlands Day (February 2) in Neknampur Lake in Hyderabad to clean and purify the polluted water body. Plants planted on FTW can clean the lake by absorbing nitrates and other pollutants in the water.

FTW’s working is based on soil-less hydroponics technique. Hydroponics permits plants to grow only on sunlight and water. There Is no need of soil. There are small holes at bottom of base which facilitates flow of nutrients from water to plants through biological uptake process.
Micro-organisms growing on FTW and plant root systems of cleaning agents break down and consume organIc matter in water through microbial decomposition. The root systems filter out sediments and pollutants, reduce content of these chemicals from waterbody.