Batch fermentation techniques are procedures for carrying out a discrete cultivation run from inoculation to harvest without a continuous replacement of culture broth [1]. A defined volume of medium is charged before inoculation, and the culture then progresses through lag, growth, production, and decline phases as nutrients are consumed and metabolites accumulate [1][2]. The technique includes preparation and sterilization of the medium, inoculum transfer, regulation of temperature and pH, control of aeration and agitation when required, sampling, and selection of a harvest criterion [2]. In a strict batch, no feed is added after inoculation, although pH-control reagents, antifoam, or gases may still enter the vessel. The resulting time trajectory reflects the starting composition, inoculum physiology, vessel environment, and organism-specific responses to nutrient depletion and product inhibition [1][3]. Batch operation is widely used for screening, seed-train development, food and beverage fermentations, and processes in which a reproducible finite run is preferable to long-term steady-state operation [4].
Fermentation and Sensory Analysis·Food Science·Agricultural and Biological Sciences·Life Sciences