scholarly journals Brewer’s Spent Yeast (BSY), an Underutilized Brewing By-Product

Fermentation ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 123
Author(s):  
Alice Jaeger ◽  
Elke K. Arendt ◽  
Emanuele Zannini ◽  
Aylin W. Sahin

The repurposing of by-products and the reduction of waste from food processing streams is an ever-increasing area of interest. Brewer’s spent yeast (BSY) is a prevalent by-product of the brewing industry. The spent yeast cells are removed at the end of the bulk fermentation. A small amount of it is used to start the next batch of fermentation; however, the majority of the spent yeast is discarded. This discarded yeast is high in nutrients, in particular proteins, vitamins and minerals, as well as containing functional and biologically active compounds such as polyphenols, antioxidants, β-glucans and mannoproteins. At present, BSY is mainly used in animal feed as a cheap and readily available source of protein. This review explores alternative, value-added applications for brewer’s spent yeast including nutritional ingredients, functional food additives as well as non-food applications. A major challenge in the utilization of BSY in food for human consumption is the high level of RNA. An excess of RNA in the diet can lead to an increase in uric acid in the bloodstream, potentially causing painful health conditions like gout. This issue can be overcome by RNA degradation and removal via additional treatment, namely heat treatment and enzymatic treatment. There is potential for the use of BSY ingredients in various food applications, including meat substitutes, bakery products and savory snacks.

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Reann Garrett ◽  
Danielle Bellmer ◽  
William McGlynn ◽  
Patricia Rayas-Duarte

Brewer’s spent grain (BSG) is a processing waste generated in large quantities by the brewing industry. It is estimated that over 38 million tons of BSG is produced worldwide each year and is usually used as animal feed, composted, or thrown into landfills. BSG contains valuable nutritional components, including protein, fiber, and antioxidants. Due to its brittle texture, strong nutty flavors, and dark color profiles, BSG has seen limited use in food products for human consumption. The objective of this study was to develop a palatable chip product that maximized the level of inclusion of BSG. Chips were produced that contained BSG levels ranging from 8% to 40%, and the physical and sensory properties of the chips were evaluated. Spent grain samples were provided by Iron Monk in Stillwater and were dried at a low temperature and milled into flour for use in the chip formulation. BSG chips were evaluated for water activity, color, and texture (fracture force). An informal sensory evaluation was conducted to evaluate flavor, texture, and probability of purchase using a 5-point hedonic rating scale. Results showed that there were no significant differences in the texture of the chips containing different levels of BSG. The color measurements showed no significant differences between L ∗ and a ∗ values for the chips containing different inclusion levels of BSG, but there were some differences in the b ∗ values. Results from the sensory evaluation showed that consumers preferred the texture of chips with 40% BSG over chips with 8% BSG, and they were also more likely to purchase the 40% BSG chips. There were no significant differences in flavor among the chips containing different inclusion levels of BSG. These results suggest that, for a chip-type product, BSG inclusion levels up to 40% are possible with positive consumer responses. Development of an alternative value-added product represents an opportunity for breweries nationwide to turn a processing waste into a future asset.


2021 ◽  
Vol 2 (6) ◽  
pp. 01-07
Author(s):  
Edward A. Calt

The microbiome of a ruminant animal rapidly converts cellulose into protein that is the true feed for the animal. Managed Ecosystem Fermentation (MEF) has harnessed this productive capacity into an industrial process. The MEF process rapidly converts cellulose, hemicellulose, carbohydrates, and starch into multiple products that have a wide range of applications in agriculture and industry. The protein produced has a complete amino acid profile and can be used as animal feed or for human consumption. Additionally, the protein contains lipids that contain Omega 3, 6 and 9, and other food additives and flavorings. The MEF process can convert approximately one metric ton of cellulosic waste per cubic meter of fermentation vessel per day into protein. This paper describes the process, results from the pilot plant, and compares the protein produced to fishmeal and other protein sources. MEF offers a technology to convert a significant amount of biomass into proteins, lipids, and enzymes in a way that is both economically and environmentally sustainable.


Author(s):  
Usha N. S. ◽  
Sabari Anand J. V. ◽  
Mangaiyarkarasi .

Background: Seaweeds since ages are excellent source of biologically active ingredients. Several Asian countries have a strong tradition of using various seaweeds in herbal medicines preparations. These plants contain various phytochemical constituents having biological activities. Seaweeds are the source of phytochemicals namely agar-agar, carrageenan and algin, which are extensively used in various industries such as food, confectionary, textiles, pharmaceuticals, dairy and paper industries mostly as gelling, stabilizing and thickening agents. They are also used for human consumption, animal feed and as manure in several countries. Several Asian countries are using various seaweeds in traditional medicines.Methods: In the present study, the shade dried and methanolic extract of Cladophora glomerata, a marine green algae was subjected to preliminary phytochemical and gas chromatography-mass spectrometry analysis(GC-MS) to identify the various bioactive components.Results: The methanolic extract of Cladophora glomerata revealed the presence of alkaloids, glycosides, flavonoids, saponins, diterpenes and carbohydrates. The GC-MS analysis of the methanolic extract of Cladophora glomerata showed the presence of 42 different compounds. The major compounds were dibutyl phthalate (27.07%), hexadecanoic acid, methyl ester (9.58%), 1,2-benzene-di-carboxylic acid (8.11%), octatriacontyl trifluoroacetate (6.81%), cholesterol (6.66%).Conclusions: Thus, in the present study of Cladophora glomerata, phytochemical and GC-MS analysis provides an important novel information to support further ongoing studies to evaluate structure of bioactive compound and its pharmacological activities.


Author(s):  
M.T. SABITOV ◽  
A.R. FARKHUTDINOVA ◽  
M.G. MALIKOVA ◽  
N.G. FENCHENKO ◽  
N.I. KHAIRULLINA ◽  
...  

Изучена целесообразность использования в рационах телят черно-пестрой породы комплексной минерально-витаминной кормовой добавки (КМВКД). Установлено пониженное содержание в кормах таких элементов, как кальций, фосфор, магний, сера, марганец, медь, цинк и кобальт. Соотношение питательных и минеральных веществ, степень их доступности для усвоения организмом не обеспечивают их потребность. Использование КМВКД способствовало улучшению всех гематологических показателей. Все испытываемые рецепты, имеющие в своем составе разные варианты макро-, микроэлементов и витаминов положительно влияют на обменные про- цессы в организме животных. У молодняка опытной группы, получавшей подкормку по рецепту 1, количество эритроцитов в сравнении с животными контрольной группы увеличилось на 6,6, гемоглобина на 6,93 соответственно, по рецепту 2 11,05 и 11,39 по рецепту 3 16,75 и 15,27, то есть соотношение макро- и микроэлементов, имеющихся в составе КМВКД и взаимодействие между собой меди, железа и кобальта сыграли особую роль на концентрацию форменных элементов. У молодняка, получавшего подкормку по рецепту 1 количество общего белка в сравнении с животными контрольной группы увеличилось на 1,99, кальция на 16,02, каротина на 10,92 соответственно, по рецепту 2 4,91, 25,96 и 19,12 по рецепту 3 на 3,58, 27,07 и 20,21. Значительное повышение содержания белка, кальция, фосфора и каротина по сравнению с животными контрольной группы объясняется тем, что недостаток их в рационах восполнялся за счет используемой подкормки, в результате их содержание увеличилось в сыворотке, но не выходило за пределы нормативных данных и соответствовало физиологическим нормам.Practicability of using a complex mineral and vitamin feed additive (CMVFA) in the ration of black-and-white calf breed was studied. Decreased content of such elements as calcium, phosphorus, magnesium, sulfur, manganese, copper, zinc, and cobalt was registered. The correlation of nutritive and mineral substances, and the level of their availability for digestion did not provide for their need. CMVFA use facilitated the increase of all hematologic parameters. Tested recipes which had different content of sapropel and zeolite, as well as various types of macronutrients, microelements, and vitamins, positively influenced the digestive processes in animal bodies. Young stock from the test group that was receiving food additives according to recipe No. 1 showed 6.6 increase in the quantity of red blood cells compared to control group animals, and 6.93 increase in hemoglobin quantity the ones who were fed according to recipe No. 2 demonstrated the increase by 11.05 and 11.39 recipe No. 3 showed 16.75 and 15.27 increase, which means that the ratio of macronutrients and microelements present in CMVFA and the mutual interaction of copper, iron, and cobalt played a special role in the concentration of formed elements due to the fact that they are integral elements of blood. Total protein of young stock that was receiving food additives according to recipe No. 1 was 1.99 higher than in test group animals calcium 16.02 higher carotene 10.92 as for recipe No. 2 the values were increased by 4.91, 25.96, and 19.12 recipe No. 3 3.58, 27.07, and 20.21. Substantial increase in the content of protein, calcium, phosphorus, and carotene compared to control group animals can be explained by the fact that their insufficiency in animal feed was replenished due to the use of feed additives, and as a result their content increased in the serum but did not go beyond the norm and corresponded to physiological norms.


2015 ◽  
Vol 72 (4) ◽  
pp. 579-584 ◽  
Author(s):  
A. Muramatsu ◽  
H. Ito ◽  
A. Sasaki ◽  
A. Kajihara ◽  
T. Watanabe

To achieve enhanced nitrogen removal, we modified a cultivation system with circulated irrigation of treated municipal wastewater by using rice for animal feed instead of human consumption. The performance of this modified system was evaluated through a bench-scale experiment by comparing the direction of circulated irrigation (i.e. passing through paddy soil upward and downward). The modified system achieved more than three times higher nitrogen removal (3.2 g) than the system in which rice for human consumption was cultivated. The removal efficiency was higher than 99.5%, regardless of the direction of circulated irrigation. Nitrogen in the treated municipal wastewater was adsorbed by the rice plant in this cultivation system as effectively as chemical fertilizer used in normal paddy fields. Circulated irrigation increased the nitrogen released to the atmosphere, probably due to enhanced denitrification. Neither the circulation of irrigation water nor its direction affected the growth of the rice plant and the yield and quality of harvested rice. The yield of rice harvested in this system did not reach the target value in normal paddy fields. To increase this yield, a larger amount of treated wastewater should be applied to the system, considering the significant amount of nitrogen released to the atmosphere.


1998 ◽  
Vol 8 (4) ◽  
pp. 415-422 ◽  
Author(s):  
Brenda Winkel Shirley

AbstractFlavonoids are secondary metabolites that are present at high levels in most plant seeds and grains. These compounds appear to play vital roles in defence against pathogens and predators and contribute to physiological functions such as seed maturation and dormancy. At the same time, particular subclasses of flavonoids, such as the proanthocyanidins (condensed tannins), negatively impact the use of seeds and grains in animal feed and can add undesirable qualities to food products for human consumption. This article presents an overview of investigations into the physiological and agronomic aspects of seed and grain flavonoids as well as a review of molecular genetic studies, particularly in maize,Arabidopsisand soybean, where mutants deficient in flavonoid biosynthesis provide useful tools for stydying the metabolic machinery underlying the accumulation of these compounds in reproductive structures.


2021 ◽  
Vol 15 (1) ◽  
Author(s):  
L. Osipova ◽  
O. Radionova ◽  
L. Tkachenko ◽  
T. Abramova

The analysis of the current state of processing of secondary raw materials of wine-making in Ukraine is given. It is proved that the latter is a rich source of biologically active compounds, including phenolic ones, which makes it possible to use it for the production of a wide range of products (raccoon, polyphenol extracts, tartaric acid, beverages, fertilizers, grape oil, cake, vitamin D, animal feed, food powder, abrasives) with high consumer value for various industries: food, pharmaceutical, perfume and cosmetics, chemical, feed, etc. In the light of modern research, the role of phenolic compounds as essential nutrition factors that cannot remain out of the field of view of physiologists, pharmacologists, and food hygiene specialists is shown. However, currently in Ukraine there are no specialized enterprises for complex processing of secondary raw materials of winemaking; traditional technologies are not effective from a technological, economic and environmental point of view, which indicates not rational use of resources and loss of material resources; there are no systematic studies on physical and chemical, microbiological, Toxicological composition in order to determine the optimal direction of its use. A limiting factor is also the lack of comparative analysis of innovative domestic and foreign technologies for processing secondary raw materials of winemaking. In the vast majority of cases, in particular, combs and pomace are taken out of control to agricultural land without special treatment, which leads to acid soil erosion and pollution of the environment with metabolites of micromycetes, increasing one of the global problems of mankind-environmental. At the present stage of technological development, there are a number of innovative developments in the field of processing secondary raw materials, in particular grape pomace, in order to obtain biologically active additives, the limiting factor for the introduction of which is the lack of domestic and expensive imported equipment. A promising way to solve the existing problems is to create a mechanism that will unite the interests of wineries (producers of secondary raw materials of winemaking), processing enterprises (producers of products from secondary raw materials of winemaking), scientists and potential consumers of innovative products. Consolidation of the above-mentioned institutions and enterprises is possible by creating clusters for the development and implementation of innovative technologies and equipment


2021 ◽  
Vol 67 (4) ◽  
pp. 3634-3648
Author(s):  
Erika Koppányné Szabó ◽  
Krisztina Takács

By 2050, 9.8 billion people are projected to live on Earth, which means that we need to double our current food production to keep pace with such a large population increase. In addition, rising greenhouse gas emissions and the associated climate change are placing a significant strain on the planet’s ability to sustain itself. However, in order to increase the quantity of proteins of plant origin, it is necessary to increase crop production areas, harvesting frequencies and the quantity of crops produced. Unfortunately, the optimization of these factors is already very close to the available maximum in the current situation. The developed cultivation systems and maximum utilization of the soil power leads to very serious environmental problems, soil destruction, loss of biodiversity and serious environmental pollution through the transport of the produced plant raw materials. This poses a serious challenge to food security and further increases the risk of hunger. There is therefore a need for agricultural practices that can lead to the cultivation of food and feed crops that have better sustainability indicators and are more resilient to climate change, which can be used to safely produce health-promoting feeds, as well as novel and value-added foods. Within this group, a particular problem is presented by the protein supply of the population, as currently about one billion people do not have adequate protein intake. However, conventional protein sources are not sufficient to meet growing protein needs. As mentioned above, food and feed proteins are based on plant proteins. In recent years, a prominent role has been played by the research into alternative proteins and the mapping of their positive and negative properties. Among alternative proteins, special attention has been paid to various yeasts, fungi, bacteria, algae, singe cell proteins (SCPs) and insects. In this paper, we focus on the presentation of algae, particularly microalgae, which are of paramount importance not only because of their significant protein content and favorable amino acid composition, but also because they are also sources of many valuable molecules, such as polyunsaturated fatty acids, pigments, antioxidants, drugs and other biologically active compounds. It is important to learn about microalgae biomass in order to be able to develop innovative health food products.


2021 ◽  
Vol 37 (6) ◽  
pp. 14-24
Author(s):  
N.N. Gessler ◽  
E.P. Isakova ◽  
Yu.I. Deryabina

Using the extremophilic yeast of Yarrowia lipolytica, a new model has been proposed to study the protective properties of stilbene polyphenols, namely resveratrol and pinosylvin, under heat shock. It was shown that a short-term thermal exposure of yeast cells (55 C, 25 min) led to a 40% decrease in the colony-forming ability of the population, a fivefold decrease in the respiration rate, and a growth of cyanide resistance and catalase activity, which indicated the adaptive yeast response to heat stress. Under these conditions, natural biologically active stilbenes, resveratrol and pinosylvin, at a concentration of 10 μM each increased yeast survival by 28% and 13%, respectively. In heat shock, resveratrol additionally raised catalase activity, while pinosylvin increased the cell respiration rate and decreased cyanide resistance and catalase activity. The results obtained indicate that resveratrol acts as a mild pro-oxidant inducing antioxidant protection during the adaptive response of the yeast to heat shock. Unlike resveratrol, pinosylvin increases cell survival stabilizing mitochondrial function and preserving the ATP-generating component of respiration. Yarrowia lipolytica yeast, polyphenols, stilbenoids, resveratrol, pinosylvin, cellular respiratory activity, heat shock, superoxide dismutase, catalase


2021 ◽  
Vol 59 (2) ◽  
Author(s):  
Elizabeta Zandona ◽  
Marijana Blažić ◽  
Anet Režek Jambrak

The dairy industry produces large amounts of whey as a by- product or co-product, which has led to considerable environmental problems due to its high organic matter content. Over the past decades, possibilities of more environmentally and economically efficient whey utilisation have been studied, primarily to convert unwanted end products into a valuable raw material. Sustainable whey management is mostly oriented to biotechnological and food applications for the development of value-added products such as whey powders, whey proteins, functional food and beverages, edible films and coatings, lactic acid and other biochemicals, bioplastic, biofuels and similar valuable bioproducts. This paper provides an overview of the sustainable utilization of whey and its constituents, considering new refining approaches and integrated processes to covert whey, or lactose and whey proteins to high value-added whey-based products.


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