Next Article in Journal
A Control Alternative for the Hidden Enemy in the Wine Cellar
Previous Article in Journal
Pesticide Residues and Stuck Fermentation in Wine: New Evidences Indicate the Urgent Need of Tailored Regulations
Previous Article in Special Issue
Free Amino Nitrogen in Brewing
Open AccessArticle

Effects of Ultradisperse Humic Sapropel Suspension on Microbial Growth and Fermentation Parameters of Barley Distillate

1
Department of Food Biotechnology for Plant Origin Products, Faculty of Food Biotechnologies and Engineering, St. Petersburg National Research University of Information Technologies, Mechanic, and Optics (ITMO University), 9 Lomonosova street, St. Petersburg 191002, Russia
2
International Laboratory “Solution Chemistry of Advanced Materials and Technologies” (SCAMT), St. Petersburg National Research University of Information Technologies, Mechanic, and Optics (ITMO University), 9 Lomonosova street, St. Petersburg 191002, Russia
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Present address: Department of Food Science, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand.
Fermentation 2019, 5(1), 24; https://doi.org/10.3390/fermentation5010024
Received: 4 February 2019 / Revised: 20 February 2019 / Accepted: 20 February 2019 / Published: 26 February 2019
(This article belongs to the Special Issue Brewing & Distilling)
Barley and other cereal grains can be used in the production of ethanol. The quality and safety of the grains utilized have enormous effects on the overall yield and quality of the final product (ethanol). Therefore, the present paper seeks to elucidate the antimicrobial activities of ultradisperse humic sapropel suspensions (UDHSS) on barley, wort, fermentation, and the quality of the final product. A standard microbiological method was used to assess the biocidal activities. Physicochemical parameters and volatile compounds were determined. Treated samples exhibited least microbial growth (for grain: 1.145 ± 0.120 × 104 cfu/g) when compared to the control (3.425 ± 0.33 × 105 cfu/g). Mash from the treated sample had less Free Amino Nitrogen (35.14 ± 0.02 mg/L) than the control experiment (41.42 ± 0.01). However, the levels of °Brix and Free Amino Nitrogen (FAN) were unaffected by the UDHSS treatments. After the chromatographic analysis, it was revealed that the barley distillate obtained from treated grains had high volatiles concentration when compared to the control experiment. The volume of the methanol quantified in the distillate was low, and hence safe, and might find applications in the food industries or in domestic consumption after rectification. View Full-Text
Keywords: antimicrobial effects; mashing; distillation; volatile compounds; gas chromatography; reactive oxygen species antimicrobial effects; mashing; distillation; volatile compounds; gas chromatography; reactive oxygen species
Show Figures

Figure 1

MDPI and ACS Style

Nsengumuremyi, D.; Adadi, P.; Ukolova, M.V.; Barakova, N.V. Effects of Ultradisperse Humic Sapropel Suspension on Microbial Growth and Fermentation Parameters of Barley Distillate. Fermentation 2019, 5, 24.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop