Question

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

Bar screening is used to separate solid wastes from liquid wastes.
Chlorine is added to disinfect wastewater before it is released.
Specialized bacteria are used to breakdown harmful substances.
Primary clarifiers allow solids to settle at the bottom of tanks.

Answer 1

am i right with C?

Answer 2

@alexis1415

Answer 3

Yeah you are.

Answer 4

i js guessed it

Answer 5

Yeah

Answer 6

i need an explanation or sum

Answer 7

@jhonyy9

Answer 8

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