Question

Following process is primarily employed for the aerobic stabilization of liquid waste

• A. Anaerobic digester
• B. Activated sludge process
• C. Septic tank
• D. Methanogenesis

Hint:

Wastewater treatment: \[ \boxed{ \begin{aligned} \text{Activated sludge process} &\rightarrow \text{Aerobic treatment} \text{Septic tank} &\rightarrow \text{Anaerobic treatment} \text{Methanogenesis} &\rightarrow \text{Biogas production under anaerobic conditions} \end{aligned} } \]

Answer 1

The Correct Option is B

Step 1: Recall the wastewater treatment methods. Wastewater treatment includes:
• Aerobic treatment using oxygen and aerobic microbes.
• Anaerobic treatment without oxygen.

Step 2: Identify the aerobic process. The \[ \boxed{\text{Activated sludge process}} \] uses aerobic microorganisms to oxidize organic matter in sewage and stabilize liquid waste. The remaining options are anaerobic processes. Hence, \[ \boxed{\text{Activated sludge process}} \] is the correct answer. Therefore, \[ \boxed{(B)} \] is the correct answer.