Civil Engineering MCQAE Level Civil Engineering
In a trickling filter, recirculation of treated effluent is commonly used to:
Environmental EngineeringWastewater TreatmentMEDIUM
Choose the correct answer
A
improve wetting and dilute high-strength influent
B
stop all biological growth on the media
C
remove the need for primary treatment in every case
D
convert the unit into a rapid sand filter
Correct Answer
A. improve wetting and dilute high-strength influent
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Recirculation dilutes strong influent, improves wetting of the media, and helps maintain stable biological treatment.
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