The aim of C sugar operation in a sugar factory is a high quality C sugar for effective follow-up refining, minimizing
sugar in molasses together with low energy consumption. On the other hand, biotechnology – ethanol fuel production
– can change these targets: either sugar in molasses is increased for fermentation processing (higher sugar content) or
C sugar operation is excluded from the sugar technology at all so that the refinery process can be simplified. To
optimize the effect of cooling crystallization, a new static model was developed. The model involves balance
equations for a horizontal crystallizer or for a part of vertical crystallizer of C-sugar operation and takes in account
the balance of the sucrose ratio in liquid and solid phase. An addition of mixing media, such as syrup or water, into
the crystallizer has been also considered. Molasses is applied in many food or non-food processes because of high
content of nitrogenous compounds, carbohydrates and its sweet taste. Molasses is traditionally used in fermentation
technologies to produce ethanol and for production of animal feed. The further potential applications are given.