Effect of Temperature-Dependent Bacterial Growth during Milk Protein Fractionation by Means of 0.1 µM Microfiltration on the Length of Possible Production Cycle Times.

摘要: This study determined the maximum possible filtration time per cycle and cumulated number of operational hours year as a function processing temperature during milk protein fractionation by 0.1 µm microfiltration (MF) pasteurized skim milk. The main stopping criteria were microbial count (max. 105 cfu/mL) slope pH change time. A membrane system in feed bleed configuration with partial recirculation retentate was installed, resembling an industrial plants’ mode. Filtration temperatures 10, 14, 16, 20, 55 °C investigated to determine flux, pH, bacterial count. While limited 420 min at temperature, it could exceed 1440 10 °C. These data can help minimize use cleaning agents or mixing phase losses reducing frequency cycles, thus maximizing active production environmental impact.