Multiple choice

Which of the following sewage treatment methods has inherent problem of odour, ponding, and fly nuisance?

  1. UASB system

  2. Activated sludge process

  3. Trickling filters

  4. Stabilisation ponds

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Ponding due to logging of the filter (trickling filter), odour due to anaerobic decomposition and fly nuisance takes place in trickling filters.