Continous addition of sugars in 'fed batch' fermentation is done to

Options

A. produce methane
B. obtain antibiotics
C. purify enzymes
D. degrade sewage

Explanation

To solve the question regarding the continuous addition of sugars in 'fed batch' fermentation, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fed Batch Fermentation**:
- Fed batch fermentation is a bioprocess where nutrients are added to the bioreactor during the fermentation process. This allows for better control over the growth conditions and can enhance the production of desired products.

2. **Purpose of Continuous Sugar Addition**:
- The continuous addition of sugars (or other nutrients) serves to maintain optimal growth conditions for the microorganisms or cells involved in the fermentation. This helps to prevent nutrient depletion and supports sustained metabolic activity.

3. **Identifying the Products**:
- In the context of fed batch fermentation, various products can be produced, including methane, antibiotics, enzymes, and others. However, the method is particularly effective for the production of certain biochemicals.

4. **Analyzing the Options**:
- The options provided are:
- Produce methane
- Obtain antibiotics
- Purify enzymes
- Degrade sewage
- Among these options, the continuous addition of sugars is most commonly associated with the production of enzymes, particularly in industrial biotechnology.

5. **Conclusion**:
- Therefore, the continuous addition of sugars in fed batch fermentation is primarily done to **purify enzymes**.

### Final Answer:
The correct option is: **purify enzymes**.

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