Absorbing oxygen from the air and pollutants from the wastewater can b – McqOptions

MCQOPTIONS

1.	Absorbing oxygen from the air and pollutants from the wastewater can be decomposed aerobic microorganisms by which of the following methods?
A.	High rate bio filters
B.	Conventional bio filters
C.	Percolating filter
D.	Rotating biological contractors
Answer» E.

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