International Journal of Chemical Studies
Vol. 6, Issue 1 (2018)
Performance evaluation of helical triple tube ultra-high-temperature milk sterilizer
Author(s): Md. IA Ansari
Abstract: Ultra high temperature (UHT) sterilization of milk is a continuous process in which milk is heated to kill all type of microbes to get shelf stable packed product at ambient temperature with a minimum change in organoleptic qualities. In this study, a helical triple tube UHT milk sterilizer having capacity of 135 l/h was used for sterilization of milk for its performance evaluation. The sterilizer consists of heating section, holding section and cooling section. In heating section, the preheated milk at 90 °C was heated to sterilization temperature of 145 °C, then in holding section kept for 2 s at sterilization temperature of 145 °C to achieve 8 log cycle reduction of B. stearothermophilus as index microorganism followed by cooling in cooling section from 145 °C to 90 °C. Sterilized milk was packed aseptically in glass bottle for standard plate count, color measurement and viscosity measurement at 15 days interval up to two months. The performance of the helical triple tube UHT milk sterilizer was found satisfactory, since the UHT milk was microbiolocally safe, free from drastic colour change and gelation after two months under ambient storage condition.
Pages: 338-340 | 790 Views 8 Downloads
How to cite this article:
Md. IA Ansari. Performance evaluation of helical triple tube ultra-high-temperature milk sterilizer. Int J Chem Stud 2018;6(1):338-340.