Use of microfiltration to improve fluid milk quality

Journal of Dairy Science
M W Elwell, D M Barbano

Abstract

The objectives of the research were to determine the growth characteristics of bacteria in commercially pasteurized skim milk as a function of storage temperature; to determine the efficacy of a microfiltration and pasteurization process in reducing the number of total bacteria, spores, and coliforms in skim milk; and to estimate the shelf life of pasteurized microfiltered skim milk as a function of storage temperature. For the first objective, commercially pasteurized skim milk was stored at 0.1, 2.0, 4.2, and 6.1 degrees C. A total bacterial count >20,000 cfu/mL was considered the end of shelf life. Shelf life ranged from 16 d at 6.1 degrees C to 66 d at 0.1 degrees C. Decreasing storage temperature increased lag time and reduced logarithmic growth rate of a mixed microbial population. The increased lag time for the mixed microbial population at a lower storage temperature was the biggest contributor to longer shelf life. For the second objective, raw skim milk was microfiltered at 50 degrees C using a Tetra Alcross M7 Pilot Plant equipped with a ceramic Membralox membrane (pore diameter of 1.4 microm). The 50 degrees C permeate was pasteurized at 72 degrees C for 15 s, and cooled to 6 degrees C. Bacterial counts of raw skim ...Continue Reading

References

Feb 1, 1988·Journal of Dairy Science·A I SaemanD M Barbano
Apr 20, 2000·Journal of Food Protection·S A DouglasK J Boor
Feb 24, 2001·Journal of Dairy Science·K J Boor
May 16, 2001·Journal of Dairy Science·K W Chapman, K J Boor
Jun 5, 2003·Journal of Dairy Science·M V SantosD M Barbano

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Citations

Apr 5, 2012·The Journal of Dairy Research·Nawfal A AlhelfiA Prysor Williams
Sep 8, 2016·The Journal of Dairy Research·Jayani Chandrapala, Bogdan Zisu
Nov 21, 2017·Journal of Dairy Science·David M Barbano
Nov 22, 2012·Journal of the Science of Food and Agriculture·Leticia Fernández GarcíaFrancisco A Riera Rodríguez
Oct 22, 2013·Journal of Dairy Science·Z Caplan, D M Barbano
Oct 20, 2015·Journal of Dairy Science·Rachel A MillerMartin Wiedmann
Jun 22, 2019·Journal of Food Protection·Lei YuanGuoqing He
Dec 15, 2020·Journal of Dairy Science·N H MartinM Wiedmann
Nov 23, 2006·Journal of Agricultural and Food Chemistry·Pedro A Vazquez-LandaverdeMichael C Qian

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