Which given statements are incorrect for bioreactors?

Options

A. Larger biomass is produced in a batch culture system w.r.l continous culture in a bioreator
B. The most commonly used bioreactors are stirred type
C. Stirrer facilitates even mixing of oxygen and nutrients
D. Bioreactor is a type of fermenter in which raw materials are biologically converted into specific products

Answer

To determine which statements about bioreactors are incorrect, let's analyze the information step by step.

### Step 1: Understand the Function of Bioreactors
Bioreactors are large tanks or vessels where biological processes occur. They are designed to provide an optimal environment for the growth of microorganisms or cells, allowing for the conversion of raw materials into specific products.

### Step 2: Analyze the Statements
1. **Statement 1**: "Larger biomass is produced in a batch culture system with respect to continuous culture in a bioreactor."
- This statement is incorrect. In a continuous culture system, biomass can be produced more efficiently and in larger quantities over time compared to a batch culture system, where the process is limited to the initial amount of raw material.

2. **Statement 2**: "The most commonly used bioreactors are Stirred type."
- This statement is correct. Stirred tank bioreactors are widely used due to their effective mixing capabilities.

3. **Statement 3**: "Stirrers facilitate even mixing of oxygen and nutrients, which is the main function of a bioreactor."
- This statement is correct. Stirrers are essential for ensuring that oxygen and nutrients are evenly distributed throughout the culture.

4. **Statement 4**: "A bioreactor is a type of fermenter in which raw materials are biologically converted into specific products."
- This statement is correct. Bioreactors are indeed a type of fermenter used for biological conversions.

### Step 3: Identify the Incorrect Statement
From the analysis, the first statement is the only incorrect statement regarding bioreactors.

### Conclusion
The incorrect statement about bioreactors is: "Larger biomass is produced in a batch culture system with respect to continuous culture in a bioreactor."

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