Supply of oxygen to the biogas plant will have

Options

A. Positive effect
B. Negative effect
C. No effect
D. None of these

Answer

### Step-by-Step Solution:

1. **Understanding the Biogas Plant**: A biogas plant is designed to decompose organic materials anaerobically (without oxygen). It typically consists of a well-like structure that is deep and made of concrete.

2. **Raw Materials Used**: The primary raw material for biogas production is cow dung, which is rich in cellulose. Other organic materials, such as paper and plant matter, can also be used.

3. **Role of Methanogens**: The decomposition process in the biogas plant is facilitated by methanogens, which are anaerobic bacteria. These bacteria thrive in environments devoid of oxygen and are responsible for breaking down the cellulose in the organic matter.

4. **Gas Production**: The metabolic activity of methanogens leads to the production of biogas, which primarily consists of methane, along with carbon dioxide, hydrogen sulfide, and hydrogen.

5. **Effect of Oxygen Supply**: Introducing oxygen into the biogas plant would disrupt the anaerobic conditions required for methanogens to function. Since these bacteria are adapted to an anaerobic environment, the presence of oxygen would inhibit their metabolic processes.

6. **Conclusion**: Therefore, supplying oxygen to the biogas plant would have a negative effect on the biogas production process, as it would hinder the activity of methanogens and slow down or stop the metabolism of cellulose.

7. **Correct Answer**: The correct option is that the supply of oxygen to the biogas plant will have a negative effect.