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treatment wetland systemsWired
•84% Informative
Soni Pradhanang , a hydrologist at the University of Rhode Island , has spent the past seven years working on her trash-based contraptions.
Called floating treatment wetland systems, these are 4-foot by 6-foot buoyant platforms topped with plants.
When their roots are submerged in contaminated water, the plants suck pollutants into their stems and leaves as they grow.
Nepal , India , and Bangladesh are testing floating wetlands in Nagdaha , Nepal .
The floating wetlands were created using trash mix that could be fashioned into a platform and resist breaking down with age.
Tests showed a 99 percent reduction in nitrate, phosphates, iron, and ammonia.
Geese and ducks flock to the floating wetlands, pooping phosphorus-rich excrement into the water.
The Kathmandu Valley Water Supply Board has shown interest in implementing the FTWS at other sites.
Pradhanang is traveling to Nepal this month to discuss next steps.
She has shared the methods of her trash-based FTWS experiments with a university in Banjarmasin , Indonesia , which is hoping to try these systems.
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