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Wiley
2025
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| Online-Zugang: | https://scijournals.onlinelibrary.wiley.com/doi/10.1002/jctb.7828 |
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- Lactic acid production by direct fermentation of agave fructans Nayeli Martha‐Lucero Alma Cruz‐Guerrero Ernesto Favela‐Torres Gustavo Viniegra‐González Luis Alberto Cira‐Chávez María Isabel Estrada‐Alvarado Journal of Chemical Technology & Biotechnology AbstractBACKGROUNDLactic acid (LA) is used in various industries and is produced mainly through lactic acid fermentation (LAF). The high cost of glucose, a common substrate, is a major challenge for LA production. Alternatives like fructans from agave are being explored for this purpose, including the production of probiotic beverages using the sap of agave leaves wasted in the field. This study aims to compare the kinetics of LA fermentation using agave fructans and glucose to identify the kinetic factors to be optimize for future use of this process.RESULTSThe study found that direct fructan fermentation by Lactobacillus bulgaricus delbrueckii (LDF) and Lactobacillus casei (LCF) achieved approximately half the productivity (P = 0.50, 0.59 gL−1/h) as compared to glucose fermentation with the same strains (P = 0.92, 1.33 gL−1/h) apparently because of the delay of fructan hydrolysis. The number of Colony Forming Units (CFU) increased following a logistic function, with a rapid decay observed for pH < 4, following first‐order kinetics. Despite the decay, CFU levels remained above 1E7 CFU/mL. This finding could be useful to produce probiotic beverages using agave leaves as a fermentation broth.CONCLUSIONThe LAB strains, Lacticaseibacillus casei NRRL B‐441 (LC) and Lactobacillus delbrueckii bulgaricus NRRL B‐763 (LD), efficiently utilize commercial agave fructans as the primary carbon source, converting them into LA without prior hydrolysis. Fermentation productivity using fructans was approximately half of that obtained with glucose. This supports using agave fructans and sap for innovative lactic acid fermentations, including probiotic beverages. © 2025 Society of Chemical Industry (SCI). 10.1002/jctb.7828 http://onlinelibrary.wiley.com/termsAndConditions#vor