Septic tanks are used for the ______________ of the deposited solids?
Correct answer: B. Anaerobic decomposition
- A. Separation
- B. Anaerobic decomposition
- C. Aerobic decomposition
- D. None of these
Explanation
A septic tank retains solids and provides oxygen-free conditions in which microorganisms anaerobically decompose the settled organic matter. Aerobic decomposition requires an external oxygen supply, which a septic tank does not normally provide.
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