6533b86cfe1ef96bd12c8307
RESEARCH PRODUCT
Valorisation of Dairy Wastes Through Kefir Grain Production
Raimondo GaglioLuca SettanniGiancarlo MoschettiVincenzo La CarrubbaRosa GuarcelloMargherita CruciataNicola Francescasubject
0106 biological sciencesEnvironmental Engineering020209 energyDairy wastes Kefir grains Lactic acid bacteria Milk Whey YeastsPasteurizationTitratable acid02 engineering and technology01 natural scienceslaw.inventionchemistry.chemical_compoundSettore AGR/17 - Zootecnica Generale E Miglioramento Geneticofluids and secretionsKluyveromyces marxianuslaw010608 biotechnology0202 electrical engineering electronic engineering information engineeringFood scienceSheep milkWaste Management and DisposalbiologyRenewable Energy Sustainability and the EnvironmentLactococcus lactisfood and beveragesbiology.organism_classificationLactic acidchemistryLeuconostoc mesenteroidesFermentationSettore AGR/16 - Microbiologia Agrariadescription
The main aim of this work was to investigate on kefir grains (KGs) increase using different dairy by-products. To this purpose, whey and deproteinized whey from cow, goat and sheep milk were compared to the pasteurized milk of the corresponding animal species. Each substrate was inoculated with 3% (w/v) of KGs cultivated in ultra-high temperature cow milk and evalu- ated for pH decrease, total titratable acidity increase and development of lactic acid bacteria (LAB) and yeasts released in the matrices after 24 h incubation at three different temperatures (20, 25 and 30 °C). The genotypic characterization of the dominating microbial populations resulted in the identification of two LAB belonging to the species Lactococcus lactis and Leuconostoc mesenteroides and one yeast strain within the species Kluyveromyces marxianus. Among whey based fermenta- tion media deproteinized sheep whey allowed the highest KGs increase (almost 50%). Results of the present investigations reveal the potential of the dairy wastes for KGs production at industrial level.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-06 |