Multiple choice

Passage of effluents into oxidation tank is for

  1. Primary treatment

  2. Secondary treatment

  3. Tertiary treatment

  4. All three
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Primary treatment involves physical removal of particles. Secondary treatment is a biological process where microorganisms in an oxidation tank or aeration tank break down organic matter in the effluent.

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