Enzyme recovery is the downstream segment of bioprocessing in which an enzyme is separated from the fermentation broth and brought to a defined purity and stability ^[1]. It begins once the fermentation has achieved peak yield, when the enzyme-containing culture is harvested and processed through a succession of discrete unit operations ^[2]. Extracellular enzymes are recovered from the cell-free supernatant after biomass removal by centrifugation or filtration, whereas intracellular enzymes require cell disruption to release the product before debris removal ^[2][3]. Subsequent operations concentrate and fractionate the crude extract, typically by ultrafiltration and chromatographic separation ^[4]. A defining quantitative feature is that overall recovery yield is the product of the yields of the individual steps, so that even a credible per-step yield of 90% across a multistage process substantially reduces final output, an effect compounded by activity loss at each manipulation owing to the labile nature of most enzymes ^[2]. The term encompasses this entire succession of operations together with the yield and purity metrics that characterize its performance ^[1].