Biogas is produced from bio-matter by :

Options

A. anaerobic fermentation
B. destructive distillation
C. fractional distillation
D. mixing petrol in bio-matter

Answer

**Step-by-Step Solution:**

1. **Understanding Biogas**: Biogas is a renewable energy source that is produced from organic materials. It primarily consists of methane and carbon dioxide.

2. **Identifying the Process**: The question asks about the process through which biogas is produced from bio-matter.

3. **Evaluating the Options**:
- **Option 1: Anaerobic fermentation**: This process occurs in the absence of oxygen and involves the breakdown of organic matter by microorganisms. This is the primary method for producing biogas.
- **Option 2: Destructive distillation**: This is a process of heating organic material in the absence of air to produce charcoal, tar, and gases, but it does not produce biogas.
- **Option 3: Fractional distillation**: This is a method used to separate mixtures based on differences in boiling points, typically used for liquids, not for producing biogas.
- **Option 4: Mixing petrol in biomatter**: This does not relate to biogas production and is not a valid method.

4. **Conclusion**: Based on the evaluation, the correct answer is **anaerobic fermentation**, as it is the process through which biogas is produced from biodegradable materials like biomass, manure, sewage, and municipal waste.

**Final Answer**: Biogas is produced from bio-matter by **anaerobic fermentation**.

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