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Question

Integrated wastewater treatment utilises a mix of both artificial and natural processes.

A
Nagapuri, Haryana, Ongole, Sidhi
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B
Surti, Mehsana, Murrah, Nagapuri
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Solution

The correct option is A Nagapuri, Haryana, Ongole, Sidhi

Wastewater including sewage can be treated in an integrated manner, by utilising a mix of artificial and natural processes. An example of such an initiative is the town of Arcata, situated along the northern coast of California. Collaborating with biologists from the Humboldt State University, the townspeople created an integrated wastewater treatment process within a natural system. A citizens' group called Friends of the Arcata Marsh (FOAM) is responsible for the upkeep and safeguarding of this wonderful project.
The cleaning occurs in two stages – (a) the conventional sedimentation, filtering and chlorine treatments are given. After this stage, lots of dangerous pollutants like dissolved heavy metals still remain. To combat this, an innovative approach was taken and (b) the biologists developed a series of six connected marshes over 60 hectares of marshland. Appropriate plants, algae, fungi and bacteria were seeded into this area, which neutralize, absorb and assimilate the pollutants. Hence, as the water flows through the marshes, it gets purified naturally.


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