Question

In the aeration tank of wastewater treatment plant , aerobic bacteria help in getting rid of some contaminants. Name some of these contaminants .how do the bacteria help to remove these contaminants

Answer 1

In aeration tank contaminants like human waste,food waste,soaps and other unwanted or harmful product is removed out by aerobic bacteria.
when the watery waste is passed through aeration tank then it already contains aerobic bacteria in it. compressed air is bubbled through the watery waste in the aeration tank to provide oxygen to activate aerobic bacteria and make them grow rapidly in this water.The large number of aerobic bacteria is produced in this way and these bacteria digest all the waste or contaminants present in water.