Q. Stirred tank bioreactors have been designed for

1. Availability of oxygen
2. Ensuring anaerobic condition in the culture vessel
3. Purification of the product
4. Addition of preservatives to product

Hello Student,
Please find answer to your question below:

Correct answer is 1. availability of oxygen
The most common type of aerobic bioreactors in use today is the stirred tank reactors, which may feature a specific internal configuration designed to provide a specific circulation pattern. The stirred tank bioreactors have been disigned for availability of oxygen throughout the process.