Question

Which of the following steps in wastewater treatment is an example of biotechnology?

I. Microorganisms are added to feed on solids in wastewater
II. Bar screening is used to separate solid wastes from liquid wastes
III. Primary clarifiers separate solids and liquid wastewater

I only
I and III
III only
I, II, and III

Answer 1

A. I only

Step-by-step explanation:

Microorganisms living in groundwater are constantly consuming dangerous chemicals and lots of organic materials. This process is called bioremediation, which is known to break down pollutants that could be useful in the treatment of wastewater.

Answer 2

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