In a gobar gas plant , methanogens convert

Options

A. Complex insoluble polymers into methane
B. complex soluble polymers into methane
C. acetic acid into methane
D. simple insoluble polymers into methane

Answer

To solve the question regarding what methanogens convert in a gobar gas plant, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process**:
- A gobar gas plant operates through a series of biochemical processes that involve various microorganisms. The main goal of these processes is to convert organic matter into biogas, primarily methane.

2. **Identifying the Stages of Biogas Production**:
- The biogas production process consists of four main stages: Hydrolysis, Acidogenesis, Acetogenesis, and Methanogenesis.

3. **Stage 1 - Hydrolysis**:
- In this initial stage, complex organic materials (polymers) are broken down into simpler monomers (like glucose and amino acids) by hydrolytic bacteria. This process does not involve methanogens.

4. **Stage 2 - Acidogenesis**:
- In this stage, the monomers produced in hydrolysis are further fermented into volatile fatty acids (VFAs) by acidogenic bacteria. This includes the production of acids like propionic acid and butyric acid.

5. **Stage 3 - Acetogenesis**:
- Here, the volatile fatty acids are converted into acetic acid, along with hydrogen and carbon dioxide, by acetogenic bacteria. This stage prepares the substrate for the final conversion to methane.

6. **Stage 4 - Methanogenesis**:
- This is the final stage where methanogenic bacteria (methanogens) convert acetic acid (produced in the previous stage) into methane (CH4) and carbon dioxide. This is the key process that we are interested in.

7. **Final Answer**:
- Therefore, in a gobar gas plant, methanogens convert acetic acid into methane.