The correct sequence in biogas production is

Options

A. Acidogenesis `rarr` Solublisation `rarr` Methanogenesis
B. Solublisation `rarr` Acidogenesis `rarr` Methanogenesis
C. Methanogenesis `rarr` Solublisation `rarr` Acidogenesis
D. Acidogenesis `rarr` Methanogenesis `rarr` Solublisation

Answer

To determine the correct sequence in biogas production, we need to understand the processes involved in the anaerobic digestion of organic matter. The production of biogas typically involves three main stages: solubilization, acidogenesis, and methanogenesis. Here’s a step-by-step breakdown of the correct sequence:

### Step-by-Step Solution:

1. **Solubilization**:
- In the first step, complex organic materials (like carbohydrates, fats, and proteins) are broken down into simpler soluble compounds. This process is facilitated by the action of microorganisms that produce enzymes to help solubilize these compounds.

2. **Acidogenesis**:
- Following solubilization, the soluble compounds undergo acidogenesis, also known as acid fermentation. During this stage, the soluble compounds are converted into volatile fatty acids, hydrogen, and carbon dioxide by fermentative bacteria. This process is crucial as it prepares the substrates for the next step.

3. **Methanogenesis**:
- The final step is methanogenesis, where methanogenic archaea convert the volatile fatty acids and hydrogen produced in the previous step into methane (CH4) and carbon dioxide (CO2). This is the stage where biogas is primarily produced, which is a mixture of methane and carbon dioxide.

### Conclusion:
Based on the above steps, the correct sequence in biogas production is:
- **Solubilization → Acidogenesis → Methanogenesis**

Thus, the correct answer is the second option: **Solubilization, Acidogenesis, and Methanogenesis**.