New drying process for lactic bacteria based on their dehydration behavior in liquid medium

Biotechnology and Bioengineering
Yannick MillePatrick Gervais

Abstract

This study describes the different stages of optimization in an original drying process for lactic acid bacteria that allows the retrieval of dried samples of Lactobacillus plantarum with maximum viability. The process involves the addition of casein powder to bacterial pellets, followed by mixing and then air-drying in a fluidized bed dryer. The effects on bacterial viability of the a(w) of the casein powder and the kinetics of a(w) variation in the fluidized bed dryer are considered. These parameters were first studied in a water-glycerol solution and the results were then applied to the drying process. Data from the study in liquid medium were reliable in the fluidized drying stage, insofar as optimal viability was achieved for similar dehydration times (16-50 min in liquid medium, and 30 min in the fluidized bed dryer). However, when the powder was mixed rapidly with bacteria, the level of destruction differed from that observed in liquid medium. Viability was up to 70% when the a(w) of water-glycerol was 0.55, whereas it was only 2.1% when the a(w) of the casein-bacterial mix was 0.64. The predictive capacity of dehydration in liquid medium is discussed with regard to the permeability of cells to external solutes. The new ...Continue Reading

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Dec 19, 2002·Biochimica Et Biophysica Acta·Yannick MillePatrick Gervais
Jun 27, 2003·Biotechnology and Bioengineering·Yannick MillePatrick Gervais

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Citations

Nov 19, 2009·Applied Microbiology and Biotechnology·Rajesh LallooNeil Gardiner
Nov 26, 2011·Journal of Biosciences·Armando Hernández García
Sep 13, 2013·BioMed Research International·Himanshu K SolankiPrachi M Thakar
Mar 4, 2014·Applied Microbiology and Biotechnology·Gerald BenschChristiana Cordes
Jun 12, 2014·Journal of Pharmaceutical Sciences·Robert H WaltersSatoshi Ohtake
Aug 2, 2011·International Journal of Food Microbiology·Claude P ChampagneDimitris Charalampopoulos
Apr 27, 2010·Current Opinion in Biotechnology·I JankovicA Mercenier
Sep 2, 2015·Journal of Biotechnology·Cyril IaconelliLaurent Beney
Feb 13, 2008·Journal of Applied Microbiology·C SantivarangknaP Foerst
Dec 2, 2006·Research in Social & Administrative Pharmacy : RSAP·Brian J IsettsMargaret B Artz
Apr 7, 2016·International Journal of Pharmaceutics·Géraldine BroeckxFilip Kiekens
Feb 2, 2010·Biochimica Et Biophysica Acta·Sebastien DupontPatrick Gervais
Nov 6, 2013·Critical Reviews in Food Science and Nutrition·Bruno EbelPatrick Gervais
Feb 2, 2018·Biotechnology Research International·Tika B KarkiKatyayanee Neupane
Jan 11, 2019·FEMS Microbiology Letters·Martín Sebastián Marcial-CobaDennis Sandris Nielsen
Aug 24, 2005·Biotechnology and Bioengineering·Yannick MillePatrick Gervais
Dec 7, 2019·FEMS Microbiology Letters·Martín Sebastián Marcial-CobaDennis Sandris Nielsen

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