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Wastewater Treatment Operator Certification Test
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Question Number 19
A minimum dissolved oxygen (D.O.) level of _____ mg/L is recommended in the aeration tank for most basic types of activated sludge processes.
A minimum dissolved oxygen (D.O.) level of 1.0 mg/L is recommended in the aeration tank for most basic types of activated sludge processes. Maintaining > 1.0 mg/L of D.O. contributes to establishing a favorable environment for the organisms, which produces the desired type of organism and the desired level of activity. (New Mexico Wastewater Systems Operator Certification Study Manual)
✔ Correct Answer:
A minimum dissolved oxygen (D.O.) level of 1.0 mg/L is recommended in the aeration tank for most basic types of activated sludge processes. Maintaining > 1.0 mg/L of D.O. contributes to establishing a favorable environment for the organisms, which produces the desired type of organism and the desired level of activity. (New Mexico Wastewater Systems Operator Certification Study Manual)
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