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Ahuja V, Chauhan S, Purewal SS, Mehariya S, Patel AK, Kumar G, Megharaj M, Yang YH, Bhatia SK. Microbial alchemy: upcycling of brewery spent grains into high-value products through fermentation. Crit Rev Biotechnol 2024:1-19. [PMID: 38163946 DOI: 10.1080/07388551.2023.2286430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/02/2023] [Indexed: 01/03/2024]
Abstract
Spent grains are one of the lignocellulosic biomasses available in abundance, discarded by breweries as waste. The brewing process generates around 25-30% of waste in different forms and spent grains alone account for 80-85% of that waste, resulting in a significant global waste volume. Despite containing essential nutrients, i.e., carbohydrates, fibers, proteins, fatty acids, lipids, minerals, and vitamins, efficient and economically viable valorization of these grains is lacking. Microbial fermentation enables the valorization of spent grain biomass into numerous commercially valuable products used in energy, food, healthcare, and biomaterials. However, the process still needs more investigation to overcome challenges, such as transportation, cost-effective pretreatment, and fermentation strategy. to lower the product cost and to achieve market feasibility and customer affordability. This review summarizes the potential of spent grains valorization via microbial fermentation and associated challenges.
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Affiliation(s)
- Vishal Ahuja
- University Institute of Biotechnology, Chandigarh University, Mohali, India
- University Centre for Research and Development, Chandigarh University, Mohali, India
| | - Shikha Chauhan
- University Institute of Biotechnology, Chandigarh University, Mohali, India
| | - Sukhvinder Singh Purewal
- University Institute of Biotechnology, Chandigarh University, Mohali, India
- University Centre for Research and Development, Chandigarh University, Mohali, India
| | | | - Anil Kumar Patel
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Gopalakrishnan Kumar
- Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Norway
| | - Mallavarapu Megharaj
- Global Centre for Environmental remediation, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, Australia
| | - Yung-Hun Yang
- Institute for Ubiquitous Information Technology and Applications, Seoul, Republic of Korea
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Shashi Kant Bhatia
- Institute for Ubiquitous Information Technology and Applications, Seoul, Republic of Korea
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
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2
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Gänzle MG, Qiao N, Bechtner J. The quest for the perfect loaf of sourdough bread continues: Novel developments for selection of sourdough starter cultures. Int J Food Microbiol 2023; 407:110421. [PMID: 37806010 DOI: 10.1016/j.ijfoodmicro.2023.110421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/17/2023] [Accepted: 09/26/2023] [Indexed: 10/10/2023]
Abstract
Sourdough fermentation, one of the oldest unit operations in food production, is currently experiencing a revival in bread production at the household, artisanal, and the industrial level. The expanding use of sourdough fermentation in bread production and the adaptation of fermentation to large scale industrial bread production also necessitate the development of novel starter cultures. Developments in the last years also have expanded the tools that are used to assess the metabolic potential of specific strains, species or genera of the Lactobacillaceae and have identified multiple ecological and metabolic traits as clade-specific. This review aims to provide an overview on the clade-specific metabolic potential of members of the Lactobacillaceae for use in sourdough baking, and the impact of these clade-specific traits on bread quality. Emphasis is placed on carbohydrate metabolism, including the conversion of sucrose and starch to soluble polysaccharides, conversion of amino acids, and the metabolism of organic acids. The current state of knowledge to compose multi-strain starter cultures (synthetic microbial communities) that are suitable for back-slopping will also be discussed. Taken together, the communication outlines the current tools for selection of microbes for use in sourdough baking.
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Affiliation(s)
- Michael G Gänzle
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada.
| | - Nanzhen Qiao
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada
| | - Julia Bechtner
- University of Alberta, Dept. of Agricultural, Food and Nutritional Science, Edmonton, Canada
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3
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Ramu Ganesan A, Hoellrigl P, Mayr H, Martini Loesch D, Tocci N, Venir E, Conterno L. The Rheology and Textural Properties of Bakery Products Upcycling Brewers' Spent Grain. Foods 2023; 12:3524. [PMID: 37835177 PMCID: PMC10572393 DOI: 10.3390/foods12193524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 10/15/2023] Open
Abstract
This study aimed to evaluate the rheological properties of doughs with 50% brewers' spent grain (BSG) derived from a rye-based (RBSG) and barley-based (BBSG) beer added, and the textural profile of the related baked products. Simple model systems using BSG flour mixed with water were studied. Two bakery products, focaccia and cookies, were made as food systems using BSG in a 1:1 ratio with wheat flour (WF). Their rheological properties and texture after baking were characterized. BSG-added dough exhibited viscoelastic properties with a solid gel-like behavior. The addition of BSG increased G' > G″ and decreased the dough flexibility. BSG addition in baked RBSG focaccia increased the hardness, gumminess, and chewiness by 10%, 9%, and 12%, respectively. BBSG cookies had a 20% increase in fracturability. A positive correlation was found between the rheological metrics of the dough and the textural parameters of BBSG-added cookies. PCA analysis revealed that complex viscosity, G', G″, and cohesiveness separated BBSG focaccia from RBSG focaccia and the control. Therefore, the rheological properties of BSG dough will have industrial relevance for 3D-printed customized food products with fiber. Adding RBSG and BBSG to selected foods will increase the up-cycling potential by combining techno-functional properties.
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Affiliation(s)
- Abirami Ramu Ganesan
- Division of Food Production and Society, Biomarine Resource Valorisation, Norwegian Institute of Bioeconomy Research, Torggården, Kudalsveien 6, NO-8027 Bodø, Norway;
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
| | - Philipp Hoellrigl
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
| | - Hannah Mayr
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
| | - Demian Martini Loesch
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
| | - Noemi Tocci
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
| | - Elena Venir
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
| | - Lorenza Conterno
- Food Technology Area, Institute for Mountain Agriculture and Food Technology Laimburg Research Centre, Laimburg 6, 39051 Pfatten/Vadena, BZ, Italy; (P.H.); (H.M.); (D.M.L.); (N.T.); (E.V.)
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4
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Neylon E, Nyhan L, Zannini E, Sahin AW, Arendt EK. From Waste to Taste: Application of Fermented Spent Rootlet Ingredients in a Bread System. Foods 2023; 12:foods12071549. [PMID: 37048370 PMCID: PMC10094320 DOI: 10.3390/foods12071549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023] Open
Abstract
The process of upcycling and incorporating food by-products into food systems as functional ingredients has become a central focus of research. Barley rootlets (BR) are a by-product of the malting and brewing industries that can be valorised using lactic acid bacteria fermentation. This research investigates the effects of the inclusion of unfermented (BR-UnF), heat-sterilised (BR-Ster), and five fermented BR ingredients (using Weissella cibaria MG1 (BR-MG1), Leuconostoc citreum TR116 (BR-TR116), Lactiplantibacillus plantarum FST1.7 (BR-FST1.7), Lactobacillus amylovorus FST2.11 (BR-FST2.11), and Limosilactobacillus reuteri R29 (BR-R29) in bread. The antifungal compounds in BR ingredients and the impact of BR on dough rheology, gluten development, and dough mixing properties were analysed. Additionally, their effects on the techno-functional characteristics, in vitro starch digestibility, and sensory quality of bread were determined. BR-UnF showed dough viscoelastic properties and bread quality comparable to the baker's flour (BF). BR-MG1 inclusion ameliorated bread specific volume and reduced crumb hardness. Breads containing BR-TR116 had comparable bread quality to BF, while the inclusion of BR-R29 substantially slowed microbial spoilage. Formulations containing BR-FST2.11 and BR-FST1.7 significantly reduced the amounts of sugar released from breads during a simulated digestion and resulted in a sourdough-like flavour profile. This study highlights how BR fermentation can be tailored to achieve desired bread characteristics.
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Affiliation(s)
- Emma Neylon
- School of Food and Nutritional Science, University College Cork, T12K8AF Cork, Ireland
| | - Laura Nyhan
- School of Food and Nutritional Science, University College Cork, T12K8AF Cork, Ireland
| | - Emanuele Zannini
- School of Food and Nutritional Science, University College Cork, T12K8AF Cork, Ireland
- Department of Environmental Biology, "Sapienza" University of Rome, 00185 Rome, Italy
| | - Aylin W Sahin
- School of Food and Nutritional Science, University College Cork, T12K8AF Cork, Ireland
| | - Elke K Arendt
- School of Food and Nutritional Science, University College Cork, T12K8AF Cork, Ireland
- APC Microbiome Ireland, University College Cork, Western Road, T12K8AF Cork, Ireland
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5
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Borowska M, Ispiryan L, Neylon E, Sahin AW, Murphy CP, Zannini E, Arendt EK, Coffey A. Screening and Application of Novel Homofermentative Lactic Acid Bacteria Results in Low-FODMAP Whole-Wheat Bread. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9040336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
FODMAPs are fermentable oligo-, di-, monosaccharides, and polyols. The application of homofermentative lactic acid bacteria (LAB) has been investigated as a promising approach for producing low-FODMAP whole-wheat bread. The low-FODMAP diet is recommended to treat irritable bowel syndrome (IBS). Wheat flour is staple to many diets and is a significant source of fructans, which are considered FODMAPs. The reduction of fructans via sourdough fermentation, generally associated with heterofermentative lactic acid bacteria (LAB), often leads to the accumulation of other FODMAPs. A collection of 244 wild-type LAB strains was isolated from different environments and their specific FODMAP utilisation profiles established. Three homofermentative strains were selected for production of whole-wheat sourdough bread. These were Lactiplantibacillus plantarum FST1.7 (FST1.7), Lacticaseibacillus paracasei R3 (R3), and Pediococcus pentosaceus RYE106 (RYE106). Carbohydrate levels in flour, sourdoughs (before and after 48 h fermentation), and resulting breads were analysed via HPAEC-PAD and compared with whole-wheat bread leavened with baker’s yeast. While strain R3 was the most efficient in FODMAP reduction, breads produced with all three test strains had FODMAP content below cut-off levels that would trigger IBS symptoms. Results of this study highlighted the potential of homofermentative LAB in producing low-FODMAP whole-wheat bread.
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6
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Martínez-Villaluenga C, Peñas E. Innovative Processing Technologies for Developing Functional Ingredients and Food Products with Health Benefits from Grains. Foods 2023; 12:foods12071356. [PMID: 37048177 PMCID: PMC10093044 DOI: 10.3390/foods12071356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 04/14/2023] Open
Abstract
Grains are dry seeds belonging to diverse crops, including cereals, pseudocereals and pulses [...].
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Affiliation(s)
| | - Elena Peñas
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), José Antonio Novais 6, 28040 Madrid, Spain
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7
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Baiano A, la Gatta B, Rutigliano M, Fiore A. Functional Bread Produced in a Circular Economy Perspective: The Use of Brewers' Spent Grain. Foods 2023; 12:foods12040834. [PMID: 36832911 PMCID: PMC9957138 DOI: 10.3390/foods12040834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/11/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
Brewers' spent grain (BSG) is the main by-product of the brewing industry, corresponding to ~85% of its solid residues. The attention of food technologists towards BSG is due to its content in nutraceutical compounds and its suitability to be dried, ground, and used for bakery products. This work was aimed to investigate the use of BSG as a functional ingredient in bread-making. BSGs were characterised for formulation (three mixtures of malted barley and unmalted durum (Da), soft (Ri), or emmer (Em) wheats) and origin (two cereal cultivation places). The breads enriched with two different percentages of each BSG flour and gluten were analysed to evaluate the effects of replacements on their overall quality and functional characteristics. Principal Component Analysis homogeneously grouped BSGs by type and origin and breads into three sets: the control bread, with high values of crumb development, a specific volume, a minimum and maximum height, and cohesiveness; Em breads, with high values of IDF, TPC, crispiness, porosity, fibrousness, and wheat smell; and the group of Ri and Da breads, which have high values of overall smell intensity, toasty smell, pore size, crust thickness, overall quality, a darker crumb colour, and intermediate TPC. Based on these results, Em breads had the highest concentrations of nutraceuticals but the lowest overall quality. Ri and Da breads were the best choice (intermediate phenolic and fibre contents and overall quality comparable to that of control bread). Practical applications: the transformation of breweries into biorefineries capable of turning BSG into high-value, low-perishable ingredients; the extensive use of BSGs to increase the production of food commodities; and the study of food formulations marketable with health claims.
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8
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Jahn LJ, Rekdal VM, Sommer MOA. Microbial foods for improving human and planetary health. Cell 2023; 186:469-478. [PMID: 36657442 DOI: 10.1016/j.cell.2022.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/18/2022] [Accepted: 12/01/2022] [Indexed: 01/19/2023]
Abstract
The current food production system is negatively impacting planetary and human health. A transition to a sustainable and fair food system is urgently needed. Microorganisms are likely enablers of this process, as they can produce delicious and healthy microbial foods with low environmental footprints. We review traditional and current approaches to microbial foods, such as fermented foods, microbial biomass, and food ingredients derived from microbial fermentations. We discuss how future advances in science-driven fermentation, synthetic biology, and sustainable feedstocks enable a new generation of microbial foods, potentially impacting the sustainability, resilience, and health effects of our food system.
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Affiliation(s)
- Leonie J Jahn
- Novo Nordisk Foundation Center for Biosustainability, DTU Biosustain, Kgs. Lyngby, Denmark
| | - Vayu M Rekdal
- Novo Nordisk Foundation Center for Biosustainability, DTU Biosustain, Kgs. Lyngby, Denmark; Joint BioEnergy Institute, Emeryville, CA 94608, USA; Department of Bioengineering, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Morten O A Sommer
- Novo Nordisk Foundation Center for Biosustainability, DTU Biosustain, Kgs. Lyngby, Denmark.
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Škrobot D, Dapčević-Hadnađev T, Tomić J, Maravić N, Popović N, Jovanov P, Hadnađev M. Techno-Functional Performance of Emmer, Spelt and Khorasan in Spontaneously Fermented Sourdough Bread. Foods 2022; 11:foods11233927. [PMID: 36496735 PMCID: PMC9741205 DOI: 10.3390/foods11233927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/18/2022] [Accepted: 11/28/2022] [Indexed: 12/09/2022] Open
Abstract
The aim of this study was to test the suitability of three different ancient wheat varieties (emmer, spelt and khorasan) to produce spontaneously fermented sourdough bread and to evaluate the impact on the dough rheological properties, ultrastructure and baking quality. Modern wheat sourdough bread and bakery yeast fermented bread were used as controls. Sourdoughs produced from modern and ancient wheats exerted different effects on dough viscoelastic properties, bread specific volume, texture, firming rate, colour and sensory properties, while there was no influence on bread water activity. Both khorasan sourdough, being characterised with the highest dough strength and dense gluten protein matrix, and emmer sourdough, with loose and thin gluten strands of low strength, yielded breads characterised by low specific volume and hard crumb texture. Spelt and modern wheat sourdough were characterised by foam-like dough structures with entrapped gas cells leading to breads of similar specific volume and texture. Although the yeast-fermented wheat flour exerted a higher specific volume and the lowest firmness, the sourdough wheat flour bread had a lower firming rate. A comparison of sourdough bread prepared with modern and ancient wheats revealed that breads based on ancient varieties possess a less noticeable sour taste, odour and flavour, thus contributing to more sensory-appealing sourdough bread.
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Affiliation(s)
- Dubravka Škrobot
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
| | - Tamara Dapčević-Hadnađev
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
| | - Jelena Tomić
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
| | - Nikola Maravić
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
- Correspondence:
| | - Nikola Popović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 9, 444a, 11042 Belgrade, Serbia
| | - Pavle Jovanov
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
| | - Miroslav Hadnađev
- Institute of Food Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
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Emmanuel JK, Nganyira PD, Shao GN. Evaluating the potential applications of brewers' spent grain in biogas generation, food and biotechnology industry: A review. Heliyon 2022; 8:e11140. [PMCID: PMC9626929 DOI: 10.1016/j.heliyon.2022.e11140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/22/2022] [Accepted: 10/13/2022] [Indexed: 11/06/2022] Open
Abstract
Breweries, as the major users of fossil fuels, are constantly under economic and environmental pressure to minimize energy consumption and residual management costs. Biogas generation from brewing wastes is a realistic solution for significantly reducing fossil fuel use. Brewers' spent grain (BSG) forms about eighty per cent of the total wastes from a brewing plant. BSG has a high cellulose and non-cellulosic polysaccharides content which makes it potential for biogas production. This paper reviews the potential applications of BSG as an alternative substrate for production of biogas and the recent achievements which have been attained in anaerobic digestion (AD) technology. The usability of BSG in diverse technologies including production of animal and human food and as a medium for growing microorganisms and enzymes is reviewed. The chemical processes involved in producing biogas from BSG are discussed.
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11
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Fermented Brewers’ Spent Grain Containing Dextran and Oligosaccharides as Ingredient for Composite Wheat Bread and Its Impact on Gut Metabolome In Vitro. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8100487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Brewers’ spent grain or BSG is a fiber and protein rich food-grade side stream that has remained underutilized due to its poor technological and sensory characteristics. In this study, BSG was fermented with Weissella confusa A16 in presence of sucrose to induce the synthesis of dextran and maltosyl-isomaltooligosaccharides. Fermented BSG with or without the above polysaccharides was used as ingredient in wheat bread. Digestion of BSG breads was simulated in vitro with Simulator of Human Intestinal Microbial Ecosystem, and levels of fecal metabolites were analyzed. Enrichment of BSG breads with in situ dextran and maltosyl-isomaltooligosaccharides improved the baking quality compared to native BSG. Metabolism of free amino acids and synthesis of short chain fatty acids varied at different stages and parts of colon. The increase in butyric acid was similar in both the proximal and distal colon. In situ dextran and maltosyl-isomaltooligosaccharides, and higher content of proteins and fiber in BSG breads had a positive influence towards gut microbiota functionality. Along with several essential amino acids, an increase in amount of γ-aminobutyric acid was also observed after simulated digestion. BSG breads had a significant effect on the gut metabolome during in vitro digestion, showing increased production of microbial metabolites with potential health benefits.
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12
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Zeko-Pivač A, Tišma M, Žnidaršič-Plazl P, Kulisic B, Sakellaris G, Hao J, Planinić M. The Potential of Brewer’s Spent Grain in the Circular Bioeconomy: State of the Art and Future Perspectives. Front Bioeng Biotechnol 2022; 10:870744. [PMID: 35782493 PMCID: PMC9247607 DOI: 10.3389/fbioe.2022.870744] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/17/2022] [Indexed: 12/30/2022] Open
Abstract
Brewer’s spent grain (BSG) accounts for approximately 85% of the total mass of solid by-products in the brewing industry and represents an important secondary raw material of future biorefineries. Currently, the main application of BSG is limited to the feed and food industry. There is a strong need to develop sustainable pretreatment and fractionation processes to obtain BSG hydrolysates that enable efficient biotransformation into biofuels, biomaterials, or biochemicals. This paper aims to provide a comprehensive insight into the availability of BSG, chemical properties, and current and potential applications juxtaposed with the existing and emerging markets of the pyramid of bio-based products in the context of sustainable and circular bioeconomy. An economic evaluation of BSG for the production of highly valuable products is presented in the context of sustainable and circular bioeconomy targeting the market of Central and Eastern European countries (BIOEAST region).
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Affiliation(s)
- Anđela Zeko-Pivač
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Marina Tišma
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
- *Correspondence: Marina Tišma,
| | - Polona Žnidaršič-Plazl
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | | | | | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Pudong, China
| | - Mirela Planinić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
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13
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Galanakis CM. Sustainable Applications for the Valorization of Cereal Processing By-Products. Foods 2022; 11:241. [PMID: 35053973 PMCID: PMC8775229 DOI: 10.3390/foods11020241] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/05/2022] [Accepted: 01/10/2022] [Indexed: 02/01/2023] Open
Abstract
This review article revises the sustainable practices and applications to valorize valuable components recovered from cereal processing by-products. After introducing cereal processing by-products, their healthy compounds, and corresponding functional properties, the article explores reutilization opportunities of by-products emphasizing specific sources (e.g., oat and wheat bran, distillers' dried grains, etc.) and the biorefinery approach. Proteins and soluble dietary fibers such as arabinoxylans are of particular interest due to their content in the cereal processing by-products and their easy extraction based on conventional technologies such as enzyme-assisted extraction and membrane filtration. Non-thermal technologies have also been suggested to improve sustainability recovery approaches. Finally, the article discusses the different applications for the recovered high-added value compounds that span across biotechnology, foods, and bakery products.
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Affiliation(s)
- Charis M. Galanakis
- Research & Innovation Department, Galanakis Laboratories, 73131 Chania, Greece;
- Department of Biology, College of Science, Taif University, Taif 26571, Saudi Arabia
- Food Waste Recovery Group, ISEKI Food Association, 1190 Vienna, Austria
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14
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Fărcaș AC, Socaci SA, Chiș MS, Pop OL, Fogarasi M, Păucean A, Igual M, Michiu D. Reintegration of Brewers Spent Grains in the Food Chain: Nutritional, Functional and Sensorial Aspects. PLANTS (BASEL, SWITZERLAND) 2021; 10:2504. [PMID: 34834863 PMCID: PMC8624837 DOI: 10.3390/plants10112504] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 06/13/2023]
Abstract
Nowadays, the pandemic situation has encouraged the idea of sustainable healthy foods leading to new trends in food consumption. Brewers spent grain (BSG) represents a potential functional food rich in fiber, protein, lipids, mineral and phenols that needs to be further exploited. In this vein, five different BSG types were collected from local breweries and valorized in cookies manufacturing. Thus, proximate composition (protein, minerals, lipids, ash, crude fiber and carbohydrates) was analyzed using AACC (American Association of Cereal Chemists) methods, DPPH (2,2-Diphenyl-1-picrylhydrazyl), and Folin Ciocalteu methods were used to determined antioxidant activity and total phenols, while minerals and aroma volatile compounds were performed using inductively coupled plasma optical emission spectrometry (ICP-OES) and ITEX/GC-MS (in tube extraction gas chromatography-mass spectrometry) respectively. Color and physical characteristics, together with sensorial analysis, were also evaluated. The results highlighted a significant difference between BSG samples, mainly from the total phenols, antioxidant activity and aroma volatile compounds point of view. BSG volatiles compounds from the aldehydes group such as 2-methyl-propanal, 3-methyl-butanal and 2-methyl-butanal were identified also in the final baked goods, leading to a pleasant and appreciated consumers' taste and aroma. Furthermore, cookies sensorial analysis emphasized that the sample manufactured with BSG from light and dark malt mixture was more appreciated by consumers, attaining the highest hedonic scores.
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Affiliation(s)
- Anca Corina Fărcaș
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (S.A.S.); (O.L.P.)
| | - Sonia Ancuța Socaci
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (S.A.S.); (O.L.P.)
| | - Maria Simona Chiș
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (M.F.); (A.P.); (D.M.)
| | - Oana Lelia Pop
- Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (S.A.S.); (O.L.P.)
| | - Melinda Fogarasi
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (M.F.); (A.P.); (D.M.)
| | - Adriana Păucean
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (M.F.); (A.P.); (D.M.)
| | - Marta Igual
- Food Investigation and Innovation Group, Food Technology Department, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain;
| | - Delia Michiu
- Department of Food Engineering, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur Street, 400372 Cluj-Napoca, Romania; (M.F.); (A.P.); (D.M.)
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