Which bioprocess involves growing cells with nutrients added and products removed continuously?

Which bioprocess involves growing cells with nutrients added and products removed continuously?

• A. Static Culture
• B. Fed-Batch Process
• C. Batch Process
• D. Continuous Flow Process

Answer: (D)

Continuous culture is the process where fresh nutrients are added continuously and culture broth is removed at the same rate, keeping the system in a steady state. This setup, often called a chemostat, maintains a constant environment so cells can keep growing and products are constantly removed with the outflow. Because the medium is continually replenished and the culture is continuously withdrawn, nutrients stay available and wastes don’t build up, enabling ongoing growth and steady production. The alternative approaches don’t fit the description. Static culture has no flow or exchange of medium, so nutrients aren’t replenished and wastes accumulate. In a batch process you start with a fixed amount of nutrients and do not add more or remove product until the end, so the culture evolves as nutrients are depleted. A fed-batch process adds nutrients over time but doesn’t remove product continuously, so there isn’t a constant outflow to keep the system in steady state.

Continuous culture is the process where fresh nutrients are added continuously and culture broth is removed at the same rate, keeping the system in a steady state. This setup, often called a chemostat, maintains a constant environment so cells can keep growing and products are constantly removed with the outflow. Because the medium is continually replenished and the culture is continuously withdrawn, nutrients stay available and wastes don’t build up, enabling ongoing growth and steady production.

The alternative approaches don’t fit the description. Static culture has no flow or exchange of medium, so nutrients aren’t replenished and wastes accumulate. In a batch process you start with a fixed amount of nutrients and do not add more or remove product until the end, so the culture evolves as nutrients are depleted. A fed-batch process adds nutrients over time but doesn’t remove product continuously, so there isn’t a constant outflow to keep the system in steady state.