Open AccessCRECIMIENTO Y CARACTERÍSTICAS FERMENTATIVAS DE Kluyveromyces marxianus EN MATRICES DERIVADAS DE LACTOSUERO
Author(s) -
García Gómez
Publication year - 2021
Publication title -
fave. sección ciencias veterinarias
Language(s) - English
Resource type - Journals
eISSN - 2362-5589
pISSN - 1666-938X
DOI - 10.14409/favecv.v19isuplemento.10941
Subject(s) - kluyveromyces marxianus , lactose , food science , chemistry , fermentation , distilled water , ethanol , yeast , biomass (ecology) , biology , chromatography , biochemistry , agronomy , saccharomyces cerevisiae
Milk whey has a high content of organic matter; therefore, uncontrolled discharge can cause environmental problems. An alternative for whey utilization is the production of fermented alcoholic beverages by means of the yeast Kluyveromyces marxianus, able to use lactose as a carbon source. Four different liquid growth media were prepared: whey powder (SP) and demineralized whey powder (SPD) (65 g/L) dissolved in sterilized distilled water; SPCal, similar to SP in composition, but sterilized and centrifuged to remove proteins, and milk permeate (PER). All media were fermented by 24 hours at 30°C. Samples were taken every 8 hours, for pH, biomass, ethanol and lactose determination. K. marxianus (LFIQK1 strain) growth was similar in SP, SPD and SP Cal (biomass between 2 – 3 g/L) and lower in PER. Moderate pH decline was observed, final values being between 4,7 and 5,4. Significant lactose consumption was observed in every growth media, with final values around 12 g/L and good ethanol production, especially for SP, SPD, and PER mediums (17,0±0,7; 17,6±0,5; 16,3±0,2 g/L respectively). These results are encouraging for the production of alcoholic beverages from the studied media using K. marxianus as the fermentation agent.