The 'sequencing batch reactor' (SBR) for wastewater treatment operates in:
Choose the correct answer
Continuous flow mode like conventional ASP
Time-based cycles (fill, react, settle, decant) in a single tank — no secondary clarifier needed
Only physical settling — no biological treatment
Gravity filtration only
Correct Answer
B. Time-based cycles (fill, react, settle, decant) in a single tank — no secondary clarifier needed
Why is this the answer?
SBR: a fill-and-draw activated sludge system operating in time-sequenced cycles: Fill (influent enters) → React (aeration for BOD removal) → Settle (sludge settles) → Decant (clear effluent withdrawn) → Idle. All in one tank. Advantages: flexible operation, no secondary clarifier needed, can achieve nitrification and denitrification. Used for small flows and intermittent industrial discharges.
Related Environmental Engineering MCQs
More solved Environmental Engineering questions for AE/JE Civil Engineering exams.
- The 'chemical oxygen demand' (COD) test measures:
- The 'Moving Bed Biofilm Reactor' (MBBR) is a biological treatment process where:
- The 'electrostatic precipitator' (ESP) works on the principle of:
- For population 50000 and water demand 135 LPCD, daily water requirement is
- A circular sewer of diameter 0.5 m runs full at velocity 0.6 m/s. Discharge is nearly
- A sedimentation tank receives 10000 m³/day over surface area 250 m². Surface overflow...
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.