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Title

Assessing the Challenges in the Application of Potential Probiotic Lactic Acid Bacteria in the Large-Scale Fermentation of Spanish-Style Table Olives

AuthorsRodríguez-Gómez, Francisco J. ; Romero-Gil, Verónica; Arroyo López, Francisco Noé ; Roldán-Reyes, Juan C.; Torres-Gallardo, Rosa; Bautista-Gallego, J. ; García García, Pedro ; Garrido Fernández, A.
Issue Date17-May-2017
PublisherFrontiers Media
CitationFrontiers in Microbiology 8: 915 (2017)
AbstractThis work studies the inoculation conditions for allowing the survival/predominance of a potential probiotic strain (Lactobacillus pentosus TOMC-LAB2) when used as a starter culture in large-scale fermentations of green Spanish-style olives. The study was performed in two successive seasons (2011/2012 and 2012/2013), using about 150 tons of olives. Inoculation immediately after brining (to prevent wild initial microbiota growth) followed by re-inoculation 24 h later (to improve competitiveness) was essential for inoculum predominance. Processing early in the season (September) showed a favorable effect on fermentation and strain predominance on olives (particularly when using acidified brines containing 25 L HCl/vessel) but caused the disappearance of the target strain from both brines and olives during the storage phase. On the contrary, processing in October slightly reduced the target strain predominance on olives (70–90%) but allowed longer survival. The type of inoculum used (laboratory vs. industry pre-adapted) never had significant effects. Thus, this investigation discloses key issues for the survival and predominance of starter cultures in large-scale industrial fermentations of green Spanish-style olives. Results can be of interest for producing probiotic table olives and open new research challenges on the causes of inoculum vanishing during the storage phase.
Publisher version (URL)http://dx.doi.org/10.3389/fmicb.2017.00915
URIhttp://hdl.handle.net/10261/153106
DOI10.3389/fmicb.2017.00915
ISSN1664-302X
Appears in Collections:(IG) Artículos
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