Air is pumped into clarified water to help which bacteria grow and eat remaining waste?
ACholera
BTyphoid
CAerobic
DAnaerobic
Answer & Solution
Correct answer: C. Aerobic
1. They consume human waste, food and soap.
2. Aerobic bacteria need oxygen.
3. They settle later as activated sludge.
_Source: syllabus Science, Chapter 18, Wastewater Story._
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