The steps wastewater treatment that can also be attributed to biotechnology from the question are:
I.Microorganisms are added to feed on solids in wastewater
III. Primary clarifiers separate solids and liquid wastewater.
- Biotechnology can be regarded as biological systems found in organisms. It is a process involving the use of living organisms themselves to make technological advances as well as adapting those technologies to various fields.
- All these process too are used in wastewater, whereby some microorganisms are used in treatment of wastewater so as to render it harmless before releasing it to water body.
Therefore, option C is correct.
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