What is meant by a semi-continuous process?

A semi-continuous process is best described as one that combines elements of both batch and continuous processes. In this type of system, certain aspects are operated continuously while others may be conducted in discrete batches. This setup allows for flexibility in production, as it can optimize certain phases for efficiency while still accommodating variations in demand or production needs.

For instance, a semi-continuous process might involve continuously feeding raw materials into a system while periodically harvesting the output at set intervals. This approach contrasts with a strictly batch process, where the entire process occurs in separate, distinct operations, and a purely continuous process, which runs without interruption. By integrating these methods, semi-continuous processes can offer advantages such as improved efficiency, reduced downtime, and better handling of fluctuations in raw materials or product requirements.