Which of the following processes is involved in the biochemical treatment of sewage effluents ?
Correct answer: A. Oxidation
- A. Oxidation
- B. Reduction
- C. Dehydration
- D. Fermentation
Explanation
In aerobic biological sewage treatment, microorganisms oxidise biodegradable organic matter, reducing its oxygen demand. Reduction and fermentation can occur in anaerobic systems, but oxidation is the standard general answer.
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