The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?

Chemical Engineering Mcqs

The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?

(A)  Biological oxygen pond

(B)  Aerated lagoons

(C)  Trickling filters

(D)  Gravity separator having oil skimming devices

Submitted By :Ali Uppal

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