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dc.contributor.authorRomanens, Edwina-
dc.contributor.authorNäf, Rebecca-
dc.contributor.authorLobmaier, Tobias-
dc.contributor.authorPedan, Vasilisa-
dc.contributor.authorFreimüller Leischtfeld, Susette-
dc.contributor.authorMeile, Leo-
dc.contributor.authorMiescher Schwenninger, Susanne-
dc.descriptionOnline First Article (not assigned to an issue)de_CH
dc.description.abstractLab-scale systems modelling the spontaneous cocoa bean fermentation process are useful tools to research the influence of process parameters on the fermentation and the final bean quality. In this study in Honduras, a 1-kg lab-scale fermentation (LS-F) was compared to a 300-kg on-farm fermentation (OF-F) in a multiphasic approach, analysing microbial counts, microbial species diversity, physico-chemical parameters, and final dried bean quality. Yeast and total aerobic counts of up to 8 log CFU/g during the LS-F were comparable to the OF-F, while counts for lactic acid bacteria and acetic acid bacteria were up to 3 log CFU/g lower during the LS-F than during the OF-F. While species of the genera Hansenia, Saccharomyces, and Acetobacter dominated most of the fermentation processes, the genera dominating the drying phases were Pichia, Trichosporon, Pediococcus, and Acetobacter. Dried beans resulting from the LS-F, compared to the OF-F, were similar in contents of acetic acid, 6 times lower in lactic acid, up to 4 times higher in residual sugars, and 3–12 times higher in polyphenols. Dried beans processed at LS showed a similar flavour profile in terms of astringency, bitterness, acidity, and brown, fine, and cocoa flavours, but 2 units higher off-flavours than OF processed beans. With 81%, the share of well-fermented beans from the LS-F complied with industrial standards, whereas 7% over-fermented beans were above the threshold. Conclusively, the 5-day model fermentation and subsequent drying successfully mimicked the on-farm process, providing a high-throughput method to screen microbial strains to be used as starter cultures.de_CH
dc.relation.ispartofApplied Microbiology and Biotechnologyde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subject.ddc630: Landwirtschaftde_CH
dc.subject.ddc664: Lebensmitteltechnologiede_CH
dc.titleA lab-scale model system for cocoa bean fermentationde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
zhaw.departementLife Sciences und Facility Managementde_CH
zhaw.organisationalunitInstitut für Lebensmittel- und Getränkeinnovation (ILGI)de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
Appears in Collections:Publikationen Life Sciences und Facility Management

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