During the aeration step, the bacteria break down the suspended organic semisolids. What are these bacteria known as?
A
Aerobic bacteria
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B
Autotrophs
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C
Heterotrophs
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D
Decomposers
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Solution
The correct option is D Decomposers Since the organic semisolids present in the wastewater are broken down, or literally eaten up by the bacteria, the semisolids get decomposed. This process is carried out by the bacteria which feed on dead and decaying organic matter. Therefore they are also known as decomposers.