Abstract
ABSTRACTEnergy requirements for processing milk using a free falling film steam infusion ultra‐high temperature (UHT) sterilization process and a high temperature‐short time (HTST) pasteurization process were determined and compared. Product flow rate was 2500 kg/hr. Milk to milk regeneration was used with both processes. UHT process temperatures were 138, 143, 149, and 154°C. The energy requirements for the UHT and HTST processes ranged between 573 and 667 kJ/kg milk and 217 and 228 kJ/kg milk, respectively. Although the UHT process consumed between 345 and 450 W/kg milk additional energy in the plant, the UHT sterilization of milk has been estimated to result in a net energy savings of 547 ‐ 652 kJ/kg milk because the product does not require post‐processing refrigeration.
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