The biochemical treatment applied to sewage effluents is a process of__________________?
Correct answer: C. Oxidation
- A. Dehydration
- B. Reduction
- C. Oxidation
- D. Polymerisation
Explanation
Biological treatment oxidises biodegradable organic matter, mainly through microbial activity, converting it into carbon dioxide, water and new biomass. Reduction and polymerisation do not describe the main sewage-treatment mechanism.
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