How the man-made wetlands act as a viable alternative to treat waste water coming from a point source of pollution? Explain (200 Words)
Refer - The Indian Express
Enrich the answer from other sources, if the question demands.
IAS Parliament 6 years
KEY POINTS
To reduce some load of untreated sewage that flows into the Yamuna, authorities in Delhi are planning a method to naturally treat around 1,500 million litres per day (MLD) of wastewater that goes into the river.
A unique experiment
· These constructed wetland systems will use boulders and a variety of plants to naturally treat sewage from drains, before it enters the river.
How treatment works
· The method involves a three-step process, which does not require electricity.
· The drain opens into an oxidation pond. Here the solid material in the waste is removed from a wire mesh and atmospheric oxygen dissolves in the water.
· The water then travels further and passes through channels and small ridges made from boulders, which creates turbulence and causes aeration.
· Aeration brings water and air in close contact, introducing small bubbles of air which rise through the water and remove dissolved gases in it.
· The final step in the treatment process happens when water passes through 25 species of plants including typha, cyprus which are effective in the treatment of heavy metals.
SAVITA SINGH 6 years
Please review..
IAS Parliament 6 years
Usefulness of wetland is not required. Keep Writing.
aswin 6 years
Please review
IAS Parliament 6 years
Try to cut short the introduction part. Keep Writing.
Priya sabalkar 6 years
Please Check . Thank You !
IAS Parliament 6 years
Good attempt. Keep Writing.
Venkateshwaran R 6 years
Kindly provide feedback. Thank you mam/sir
IAS Parliament 6 years
Good attempt. Keep Writing.
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