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Question

Why is biogas considered superior to dry animal dung as a fuel ? Draw a neat labelled diagram of a biogas plant.


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Solution

Biogas: Biogas is a type of sustainable energy that is created using organic waste and materials by the process of anaerobic digestion.

It is considered superior to dry animal dung because:

  1. The combustion of animal excrement pollutes the atmosphere, whereas biogas is a smokeless fuel.
  2. Animal dung which is used as fuel has a lower calorific value than biogas.
  3. Animal dung leaves a residue after burning, whereas biogas doesn't leave any residue after burning.

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