Alcoholic fermentation of beet molasses: effects of lactic acid on yeast fermentation parameters

1989 ◽  
Vol 31 (2) ◽  
pp. 125-128 ◽  
Author(s):  
J. J. Essia Ngang ◽  
F. Letourneau ◽  
P. Villa
Keyword(s):  
Lactic Acid ◽  
Alcoholic Fermentation ◽  
Yeast Fermentation ◽  
Beet Molasses ◽  
Fermentation Parameters

scholarly journals Saccharomyces cerevisiae Fermentation of 28 Barley and 12 Oat Cultivars

Fermentation ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 59
Author(s):  
Timothy J. Tse ◽  
Daniel J. Wiens ◽  
Jianheng Shen ◽  
Aaron D. Beattie ◽  
Martin J. T. Reaney
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Succinic Acid ◽  
Alcoholic Fermentation ◽  
Ethanol Yield ◽  
Cereal Crops ◽  
Fermentation Products ◽  
Barley Cultivars ◽  
Oat Cultivars

As barley and oat production have recently increased in Canada, it has become prudent to investigate these cereal crops as potential feedstocks for alcoholic fermentation. Ethanol and other coproduct yields can vary substantially among fermented feedstocks, which currently consist primarily of wheat and corn. In this study, the liquified mash of milled grains from 28 barley (hulled and hull-less) and 12 oat cultivars were fermented with Saccharomyces cerevisiae to determine concentrations of fermentation products (ethanol, isopropanol, acetic acid, lactic acid, succinic acid, α-glycerylphosphorylcholine (α-GPC), and glycerol). On average, the fermentation of barley produced significantly higher amounts of ethanol, isopropanol, acetic acid, succinic acid, α-GPC, and glycerol than that of oats. The best performing barley cultivars were able to produce up to 78.48 g/L (CDC Clear) ethanol and 1.81 g/L α-GPC (CDC Cowboy). Furthermore, the presence of milled hulls did not impact ethanol yield amongst barley cultivars. Due to its superior ethanol yield compared to oats, barley is a suitable feedstock for ethanol production. In addition, the accumulation of α-GPC could add considerable value to the fermentation of these cereal crops.

scholarly journals Dynamics of Fermentation Parameters and Bacterial Community in High-Moisture Alfalfa Silage with or without Lactic Acid Bacteria

2021 ◽  
Vol 9 (6) ◽  
pp. 1225
Author(s):  
Shanshan Zhao ◽  
Fengyuan Yang ◽  
Yuan Wang ◽  
Xiaomiao Fan ◽  
Changsong Feng ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Bacterial Community ◽  
Ph Value ◽  
Ammoniacal Nitrogen ◽  
High Concentration ◽  
High Moisture ◽  
Acid Accumulation ◽  
Alfalfa Silage ◽  
Fermentation Parameters

The aim of this study was to gain deeper insights into the dynamics of fermentation parameters and the bacterial community during the ensiling of high-moisture alfalfa. A commercial lactic acid bacteria (YX) inoculant was used as an additive. After 15 and 30 days of ensiling, the control silage (CK) exhibited a high pH and a high concentration of ammoniacal nitrogen (NH3-N); Enterobacter and Hafnia-Obesumbacterium were the dominant genera. At 60 d, the pH value and the concentration of NH3-N in CK silage increased compared with 15 and 30 d, propionic acid and butyric acid (BA) were detected, and Garciella had the highest abundance in the bacterial community. Compared with CK silage, inoculation of YX significantly promoted lactic acid and acetic acid accumulation and reduced pH and BA formation, did not significantly reduce the concentration of NH3-N except at 60 d, and significantly promoted the abundance of Lactobacillus and decreased the abundance of Garciella and Anaerosporobacter, but did not significantly inhibit the growth of Enterobacter and Hafnia-Obesumbacterium. In conclusion, high-moisture alfalfa naturally ensiled is prone to rot. Adding YX can delay the process of silage spoilage by inhibiting the growth of undesirable microorganisms to a certain extent.

Inhibition of spoilage lactic acid bacteria by lysozyme during wine alcoholic fermentation

2002 ◽  
Vol 8 (1) ◽  
pp. 76-83 ◽  
Author(s):  
YUN CAI GAO ◽  
GUOPENG ZHANG ◽  
SHERI KRENTZ ◽  
SUE DARIUS ◽  
JENNIFER POWER ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Alcoholic Fermentation

scholarly journals Bacterial inoculant effect on quality of alfalfa silage and haylage

2019 ◽  
Vol 35 (1) ◽  
pp. 85-96
Author(s):  
Snezana Djordjevic ◽  
Violeta Mandic ◽  
Nikola Djordjevic ◽  
Biljana Pavlovic
Keyword(s):  
Lactic Acid ◽  
Nutritive Value ◽  
Starter Culture ◽  
Livestock Production ◽  
Forage Legumes ◽  
Acid Fermentation ◽  
Cattle Farm ◽  
Fermentation Parameters ◽  
High Level

Using of silage and haylage of forage legumes in ruminant nutrition and promotion of promoting proper forage conservation techniques should be an important strategy in livestock production in our country. Forage legumes are difficult to ensile, so it is necessary to apply the starter culture of selected strains of lactic acid bacteria that support the ensiling process and prevent bacterial butyric fermentation and thus contribute to the preservation and improvement of silage and haylage quality. In this paper, the influence of bacterial inoculant ?Silko for alfalfa? on the quality of silage and haylage of alfalfa in two separate trials is presented. The inoculant is a combination of homofermentative lactic bacteria Lactobacillus plantarum and Pediococcus spp. The first-cut alfalfa in the second year was used for silage and haylage. The silage was examined in mini-silos in the laboratory, and the haylage at the cattle farm where the plant material was cuts were collected in experimental silo bags. The treatments were control (untreated silage, i.e. haylage) and silage, i.e. haylage treated with inoculant ?Silko for alfalfa? (rate of 5 ml t-1 fresh material). The silages were analyzed after 90 days, and haylage after 40. The inoculant ?Silko for alfalfa? has been found to maintain the nutritive value of silage and haylage and to improve their chemical, energy and fermentation parameters relative to the control. Since ?Silko for alfalfa? positively affects the correct lactic acid fermentation of silage and haylage and contributes to a lesser loss of nutritional value and energy it is expected that it can promote a high level of productivity of ruminants, and thus contribute to the growth of profit in livestock production.

Effect of cereal and pea monocultures and combinations and silage additives on whole-crop cereal silage nutritive and fermentation characteristics

2013 ◽  
Vol 53 (5) ◽  
pp. 427 ◽  
Author(s):  
J. L. Jacobs ◽  
G. N. Ward
Keyword(s):  
Lactic Acid ◽  
Dry Matter ◽  
Nutritive Value ◽  
Matter Content ◽  
Efficient Production ◽  
Dry Matter Content ◽  
Total N ◽  
Winter Cereals ◽  
Fermentation Parameters ◽  
Silage Additives

The efficient production and utilisation of home-grown feed is considered one of the key factors that underpins the profitability of dairy systems in southern Australia. The use of winter forage cereals for grazing and silage provides an opportunity to achieve high dry matter yields over the winter and spring period. However, questions remain on the nutritive value of whole-crop cereal silage and its subsequent use as a production feed in livestock systems. This experiment examined the nutritive characteristics of winter wheat, triticale, forage peas and bi-crops of cereals and peas sown at different proportions, cut for silage at the soft dough growth stage of the cereals and their subsequent silage nutritive characteristics and fermentation patterns when ensiled with and without bacterial inoculant additives over 2 consecutive years. The estimated metabolisable energy (ME) (Year 1) and crude protein (CP) (Years 1 and 2) concentrations of the forage pea before and after ensiling were higher (P < 0.05) than all other forages in both years. The cereal–pea mixes had similar estimated ME values to the cereal monocultures both before harvesting and as silage, although there were significant improvements in CP concentration at the higher rates of pea inclusion. All resultant silages were well fermented as indicated by low pH, low proportions of total N as ammonia-N and high lactic acid concentrations. There were marked differences in the proportions of lactic acid and acetic acid in the pea silages between years and this is likely a result of dry matter content differences at ensiling. There was no effect of silage additives on resultant silage nutritive characteristics or fermentation parameters indicating that well fermented silage can be achieved without the additional cost of using a silage additive. This study has indicated that forage peas can be ensiled with winter cereals and produce silages that have higher CP concentrations than cereal silage but with similar fermentation parameters. Furthermore, this experiment has highlighted the potential of growing a monoculture of forage peas for ensiling with the resulting silage having higher estimated ME and CP concentrations.

scholarly journals The Role of Yeasts and Lactic Acid Bacteria on the Metabolism of Organic Acids during Winemaking

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1231 ◽  
Author(s):  
Ana Mendes Ferreira ◽  
Arlete Mendes-Faia
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Alcoholic Fermentation ◽  
Main Role ◽  
Wine Yeasts ◽  
Grape Berries ◽  
Multiple Reactions ◽  
Wine Composition ◽  
Microbial Stability

The main role of acidity and pH is to confer microbial stability to wines. No less relevant, they also preserve the color and sensory properties of wines. Tartaric and malic acids are generally the most prominent acids in wines, while others such as succinic, citric, lactic, and pyruvic can exist in minor concentrations. Multiple reactions occur during winemaking and processing, resulting in changes in the concentration of these acids in wines. Two major groups of microorganisms are involved in such modifications: the wine yeasts, particularly strains of Saccharomyces cerevisiae, which carry out alcoholic fermentation; and lactic acid bacteria, which commonly conduct malolactic fermentation. This review examines various such modifications that occur in the pre-existing acids of grape berries and in others that result from this microbial activity as a means to elucidate the link between microbial diversity and wine composition.

Effect of mixed species alcoholic fermentation on growth and malolactic activity of lactic acid bacteria

2019 ◽  
Vol 103 (18) ◽  
pp. 7687-7702 ◽  
Author(s):  
Vasileios Englezos ◽  
David Castrillo Cachón ◽  
Kalliopi Rantsiou ◽  
Pilar Blanco ◽  
Maurizio Petrozziello ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Alcoholic Fermentation ◽  
Mixed Species

Subsequent improvement of lactic acid production from beet molasses by Enterococcus hirae ds10 using different fermentation strategies

2021 ◽  
Vol 13 ◽  
pp. 100617
Author(s):  
Mohamed Ali Abdel-Rahman ◽  
Saad El-Din Hassan ◽  
Hassan M.A. Alrefaey ◽  
Ehab F. El-Belely ◽  
Tamer Elsakhawy ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Enterococcus Hirae ◽  
Beet Molasses ◽  
Subsequent Improvement

ATR-MIR spectroscopy and multivariate analysis in alcoholic fermentation monitoring and lactic acid bacteria spoilage detection

Food Control ◽  
2020 ◽  
Vol 109 ◽  
pp. 106947 ◽  
Author(s):  
Julieta Cavaglia ◽  
Daniel Schorn-García ◽  
Barbara Giussani ◽  
Joan Ferré ◽  
Olga Busto ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Alcoholic Fermentation ◽  
Mir Spectroscopy ◽  
Fermentation Monitoring

Biometric Study on the Ability of Wine Yeasts to Produce and/or Degrade DL-Lactic Acid during Alcoholic Fermentation

2002 ◽  
Vol 13 (2) ◽  
pp. 101-115
Author(s):  
Claudio Delfini ◽  
Raffaella Schellino ◽  
Marta Minetto ◽  
Piero Gaia ◽  
Adolfo Pagliara ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Alcoholic Fermentation ◽  
Wine Yeasts
Sign in / Sign up

Export Citation Format

Share Document