Identify the correct order of events in sewage treatment process. (a) Primary treatment (physical removal of particles) (b) Secondary treatment (biological treatment) (c) Floc formation and sedimentation (d) Anaerobic sludge digestion (e) Aeration and microbial growth
- A(a), (c), (e), (b), (d)
- B(a), (b), (c), (d), (e)
- C(a), (e), (c), (b), (d)
- D(e), (c), (a), (b), (d)
✓ Correct answer: A
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