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Wastewater Treatment Operator Certification Test

Question Number 54


✔ Correct Answer:
D. Primary treatment units(Operation of Wastewater Treatment Plants, Volume 1, comprehensive review questions #2by Kenneth D. Kerri)
Which treatment units in a wastewater treament plant are designed and operated to remove sludge and scum? A. Headworks basinsB. Pre-aeration treatment unitsC. Preliminary treatment unitsD. Primary treatment units