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Which of the following is not true of aerobic digestion ?
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- It generates most sludge
- It generally incurs higher running cost
- It may generate a usable fuel
- Requires a shorter residence time
Correct Option: C
Organic ingredients intended for composting can alternatively be used to generate biogas through anaerobic digestion. Anaerobic digestion is fast overtaking composting in some parts of the world including central Europe as a primary means of downcycling waste organic matter.
