What are the components of Bio-gas

Options

A. `50-70% ` methane + 30 - 40 % `CO_(2) +H_(2) +N_(2) +H_(2)S`
B. `50-70 % CO_2 + 30 %` methane `+O_2 +N_2 +H_2S`
C. `50-70 % ` butane `+ 30 % ` methane ` +H_2 +O_2 +H_(2) S`
D. `90% ` methane `+10 % H_2 S+CO_2+O_(2)+N_2`

Answer

### Step-by-Step Solution:

1. **Definition of Biogas**: Biogas is a renewable energy source that is produced through the degradation of organic matter. This process occurs in the absence of oxygen, known as anaerobic conditions.

2. **Main Component - Methane**: The primary component of biogas is methane (CH₄). It typically constitutes about 50% to 70% of the total composition of biogas.

3. **Secondary Component - Carbon Dioxide**: The second most abundant component in biogas is carbon dioxide (CO₂), which makes up approximately 30% to 40% of the gas mixture.

4. **Trace Gases**: In addition to methane and carbon dioxide, biogas contains trace amounts of other gases. These include hydrogen (H₂), nitrogen (N₂), and hydrogen sulfide (H₂S).

5. **Conclusion**: Therefore, the main components of biogas are:
- Methane (50-70%)
- Carbon Dioxide (30-40%)
- Trace gases (Hydrogen, Nitrogen, Hydrogen Sulfide)