In the waste water treatment plant (WWTP) air is pumped into water to:

Support the growth of anaerobic bacteria

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Support the growth of aerobic bacteria

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Disinfect water

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Blow human waste

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Solution

The correct option is B
Support the growth of aerobic bacteria

Wastewater aeration is the process of adding air into wastewater to allow aerobic bio-degradation of the pollutant components. It is an integral part of most biological wastewater treatment systems. It helps the aerobic bacteria grow. The microbes feed on the organic material, forming flocks which can easily settle out.

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