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Relevant bibliographies by topics / Yeast bioprocess

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Academic literature on the topic 'Yeast bioprocess'

Author: Grafiati

Published: 4 June 2025

Last updated: 14 July 2025

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Journal articles on the topic "Yeast bioprocess"

1

Mota, Marta N., Paula Múgica, and Isabel Sá-Correia. "Exploring Yeast Diversity to Produce Lipid-Based Biofuels from Agro-Forestry and Industrial Organic Residues." Journal of Fungi 8, no. 7 (2022): 687. http://dx.doi.org/10.3390/jof8070687.

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Exploration of yeast diversity for the sustainable production of biofuels, in particular biodiesel, is gaining momentum in recent years. However, sustainable, and economically viable bioprocesses require yeast strains exhibiting: (i) high tolerance to multiple bioprocess-related stresses, including the various chemical inhibitors present in hydrolysates from lignocellulosic biomass and residues; (ii) the ability to efficiently consume all the major carbon sources present; (iii) the capacity to produce lipids with adequate composition in high yields. More than 160 non-conventional (non-Saccharomyces) yeast species are described as oleaginous, but only a smaller group are relatively well characterised, including Lipomyces starkeyi, Yarrowia lipolytica, Rhodotorula toruloides, Rhodotorula glutinis, Cutaneotrichosporon oleaginosus and Cutaneotrichosporon cutaneum. This article provides an overview of lipid production by oleaginous yeasts focusing on yeast diversity, metabolism, and other microbiological issues related to the toxicity and tolerance to multiple challenging stresses limiting bioprocess performance. This is essential knowledge to better understand and guide the rational improvement of yeast performance either by genetic manipulation or by exploring yeast physiology and optimal process conditions. Examples gathered from the literature showing the potential of different oleaginous yeasts/process conditions to produce oils for biodiesel from agro-forestry and industrial organic residues are provided.

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Valdez Castillo, Mariana, Satinder Kaur Brar, Sonia Arriaga, Jean-François Blais, Michèle Heitz, and Antonio Avalos Ramirez. "Co-Fermentation of Agri-Food Residues Using a Co-Culture of Yeasts as a New Bioprocess to Produce 2-Phenylethanol." Molecules 28, no. 14 (2023): 5536. http://dx.doi.org/10.3390/molecules28145536.

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Whey is a dairy residue generated during the production of cheese and yogurt. Whey contains mainly lactose and proteins, contributing to its high chemical oxygen demand (COD). Current environmental regulations request proper whey disposal to avoid environmental pollution. Whey components can be transformed by yeast into ethanol and biomolecules with aroma and flavor properties, for example, 2-phenyethanol (2PE), highly appreciated in the industry due to its organoleptic and biocidal properties. The present study aimed to valorize agri-food residues in 2PE by developing suitable bioprocess. Cheese whey was used as substrate source, whereas crab headshells, residual soy cake, and brewer’s spent yeast (BSY) were used as renewable nitrogen sources for the yeasts Kluyveromyces marxianus and Debaryomyces hansenii. The BSYs promoted the growth of both yeasts and the production of 2PE in flask fermentation. The bioprocess scale-up to 2 L bioreactor allowed for obtaining a 2PE productivity of 0.04 g2PE/L·h, twofold better productivity results compared to the literature. The bioprocess can save a treatment unit because the whey COD decreased under the detection limit of the analytical method, which is lower than environmental requirements. In this way, the bioprocess prevents environmental contamination and contributes to the circular economy of the dairy industry.

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Bărbulescu, Iuliana Diana, Mihaela Violeta Ghica, Mihaela Begea, et al. "Optimization of the Fermentation Conditions for Brewing Yeast Biomass Production Using the Response Surface Methodology and Taguchi Technique." Agriculture 11, no. 12 (2021): 1237. http://dx.doi.org/10.3390/agriculture11121237.

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Yeast (including brewing yeast) and yeast-based preparations derived from bioprocesses or agroindustrial byproducts represent valuable feed additives and ingredients for ruminants. The optimization of brewing yeast biotechnological processing through fermentation mediated by the brewing yeast strain Saccharomyces pastorianus ssp. carlsbergensis W34/70 was investigated. The cultivation conditions (temperature, pH, carbon source, and nitrogen source) were selected and designed according to a Taguchi fractional experimental plan, with four factors on three levels, and their influence on the evolution of the bioprocess of obtaining the brewing yeast biomass was evaluated. The dependent variables were the yeast biomass amount in wet form, yeast biomass amount in dried form after lyophilization, dried yeast biomass wettability assayed through the contact angle (CA), protein content (PC), and dry matter content (DS). The effects that the experimental conditions had on the system responses were visualized in tridimensional space using the response surface methodology, and the combination of biotechnological parameters that ensured process quality and robustness was then determined using the Taguchi technique through its performance indicator, i.e., the signal-to-noise ratio. By optimizing the biotechnological parameters, this study provides a valuable contribution in the area of brewing yeast biomass processing, with the aim of producing probiotic yeast for ruminant nutrition.

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4

Novak, Mario, Nenad Marđetko, Antonija Trontel, et al. "Development of an Integrated Bioprocess System for Bioethanol and Arabitol Production from Sugar Beet Cossettes." Food Technology and Biotechnology 62, no. 1 (2024): 89–101. http://dx.doi.org/10.17113/ftb.62.01.24.8230.

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Research background. An innovative integrated bioprocess system for bioethanol production from raw sugar beet cossettes (SBC) and arabitol from remaining exhausted sugar beet cossettes (ESBC) was studied. This integrated three-stage bioprocess system is an example of the biorefinery concept to maximise the use of raw SBC for the production of high value-added products such as sugar alcohols and bioethanol. Experimental approach. The first stage of the integrated bioprocess system was simultaneous sugar extraction from SBC and its alcoholic fermentation to produce bioethanol in an integrated bioreactor system (vertical column bioreactor and stirred tank bioreactor) containing a high-density suspension of yeast Saccharomyces cerevisiae (30 g/L). The second stage was the pretreatment of ESBC with dilute sulfuric acid to release fermentable sugars. The resulting liquid hydrolysate of ESBC was used in the third stage as a nutrient medium for arabitol production by non-Saccharomyces yeasts (Spathaspora passalidarum CBS 10155 and Spathaspora arborariae CBS 11463). Results and conclusions. The obtained results show that the efficiency of bioethanol production increased with increasing temperature and prolonged residence time in the integrated bioreactor system. The maximum bioethanol production efficiency (87.22 %) was observed at a time of 60 min and a temperature of 36 °C. Further increase in residence time (above 60 min) did not result in the significant increase of bioethanol production efficiency. Weak acid hydrolysis was used for ESBC pretreatment and the highest sugar yield was reached at 200 °C and residence time of 1 min. The inhibitors of the weak acid pretreatment were produced below bioprocess inhibition threshold. The use of the obtained liqiud phase of ESBC hydrolysate for the production of arabitol in the stirred tank bioreactor under constant aeration clearly showed that S. passalidarum CBS 10155 with 8.48 g/L of arabitol (YP/S=0.603 g/g and bioprocess productivity of 0.176 g/(L·h)) is a better arabitol producer than Spathaspora arborariae CBS 10155. Novelty and scientific contribution. An innovative integrated bioprocess system for the production of bioethanol and arabitol was developed based on the biorefinery concept. This three-stage bioprocess system shows great potential for maximum use of SBC as a feedstock for bioethanol and arabitol production and it could be an example of a sustainable ‘zero waste’ production system.

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Dumitrache, Corina, Mihaela Violeta Ghica, Mihai Frîncu, et al. "Bioprocess Optimization by Taguchi Design and Response Surface Analysis for Obtaining Active Yeast Used in Vinification." Fermentation 10, no. 8 (2024): 413. http://dx.doi.org/10.3390/fermentation10080413.

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This study presents the behavior of the identified yeast strain S. cerevisiae, isolated from Busuioacă de Bohotin grapes from the Pietroasa winery, during the process of fermentation to obtain dry active yeast biomass for the winemaking process. In this respect, we promoted an optimization strategy for obtaining active dry yeast biomass. The cultivation conditions for micropilot fermentation (temperature, pH, carbon source, and nitrogen source) were selected and designed according to a Taguchi design with four factors and three levels. Reproducibility testing was conducted under specific fermentation parameters: temperature (32 °C), pH (4.5), carbon source (12%), and nitrogen source (0.7%). Following the optimization process, two combinations of cultivation parameters were selected, and one of them, based on the results, was selected for further analysis. Quantitative data were obtained, showing dry yeast biomass (DCW) at 1.39 g/100 mL and protein content at 45.57%. The active yeast was then used in the winemaking process for Tămâioasă Românească and Busuioacă de Bohotin varieties at Pietroasa winery for validation. This optimization aims to facilitate easy and rapid production of fresh wine yeast tailored to the local winemaking practices of Pietroasa winery, with real application potential in other viticultural areas, aligning with the terroir concept.

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6

Sendrescu, Dorin. "Distribution-Based Identification of Yield Coefficients in a Baker’s Yeast Bioprocess." Mathematical Problems in Engineering 2012 (2012): 1–21. http://dx.doi.org/10.1155/2012/789156.

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A distribution-based identification procedure for estimation of yield coefficients in a baker’s yeast bioprocess is proposed. This procedure transforms a system of differential equations to a system of algebraic equations with respect to unknown parameters. The relation between the state variables is represented by functionals using techniques from distribution theory. A hierarchical structure of identification is used, which allows obtaining a linear algebraic system of equations in the unknown parameters. The coefficients of this algebraic system are functionals depending on the input and state variables evaluated through some test functions from distribution theory. First, only some state equations are evaluated throughout test functions to obtain a set of linear equations in parameters. The results of this first stage of identification are used to express other parameters by linear equations. The process is repeated until all parameters are identified. The performances of the method are analyzed by numerical simulations.

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Mahjoub, M., R. Mosrati, M. Lamotte, C. Fonteix, and I. Marc. "Fuzzy control of baker's yeast fed-batch bioprocess: A robustness study." Food Research International 27, no. 2 (1994): 145–53. http://dx.doi.org/10.1016/0963-9969(94)90156-2.

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Theodosiou, Eleni. "Engineering Strategies for Efficient Bioconversion of Glycerol to Value-Added Products by Yarrowia lipolytica." Catalysts 13, no. 4 (2023): 657. http://dx.doi.org/10.3390/catal13040657.

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Yarrowia lipolytica has been a valuable biotechnological workhorse for the production of commercially important biochemicals for over 70 years. The knowledge gained so far on the native biosynthetic pathways, as well as the availability of numerous systems and synthetic biology tools, enabled not only the regulation and the redesign of the existing metabolic pathways, but also the introduction of novel synthetic ones; further consolidating the position of the yeast in industrial biotechnology. However, for the development of competitive and sustainable biotechnological production processes, bioengineering should be reinforced by bioprocess optimization strategies. Although there are many published reviews on the bioconversion of various carbon sources to value-added products by Yarrowia lipolytica, fewer works have focused on reviewing up-to-date strain, medium, and process engineering strategies with an aim to emphasize the significance of integrated engineering approaches. The ultimate goal of this work is to summarize the necessary knowledge and inspire novel routes to manipulate at a systems level the yeast biosynthetic machineries by combining strain and bioprocess engineering. Due to the increasing surplus of biodiesel-derived waste glycerol and the favored glycerol-utilization metabolic pathways of Y. lipolytica over other carbon sources, the present review focuses on pure and crude glycerol-based biomanufacturing.

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Do, Diem T. Hoang, Chrispian W. Theron, and Patrick Fickers. "Organic Wastes as Feedstocks for Non-Conventional Yeast-Based Bioprocesses." Microorganisms 7, no. 8 (2019): 229. http://dx.doi.org/10.3390/microorganisms7080229.

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Non-conventional yeasts are efficient cell factories for the synthesis of value-added compounds such as recombinant proteins, intracellular metabolites, and/or metabolic by-products. Most bioprocess, however, are still designed to use pure, ideal sugars, especially glucose. In the quest for the development of more sustainable processes amid concerns over the future availability of resources for the ever-growing global population, the utilization of organic wastes or industrial by-products as feedstocks to support cell growth is a crucial approach. Indeed, vast amounts of industrial and commercial waste simultaneously represent an environmental burden and an important reservoir for recyclable or reusable material. These alternative feedstocks can provide microbial cell factories with the required metabolic building blocks and energy to synthesize value-added compounds, further representing a potential means of reduction of process costs as well. This review highlights recent strategies in this regard, encompassing knowledge on catabolic pathways and metabolic engineering solutions developed to endow cells with the required metabolic capabilities, and the connection of these to the synthesis of value-added compounds. This review focuses primarily, but not exclusively, on Yarrowia lipolytica as a yeast cell factory, owing to its broad range of naturally metabolizable carbon sources, together with its popularity as a non-conventional yeast.

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Grahovac, Jovana, Ivana Pajcin, Vanja Vlajkov, et al. "Xanthomonas campestris biocontrol agent: Selection, medium formulation and bioprocess kinetic analysis." Chemical Industry and Chemical Engineering Quarterly, no. 00 (2020): 32. http://dx.doi.org/10.2298/ciceq200508032g.

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Black rot, caused by Xanthomonas campestris pv. campestris, is one of the most important diseases of cruciferous crops which causes significant yield losses. Biological control of black rot by microbial biocontrol agents represents a promising alternative to chemical treatments and good agricultural practices which show only limited success. This study was carried out to assess a potential of different antagonists, including genera Bacillus, Pseudomonas, Lactobacillus, Streptomyces, Saccharomyces and Trichoderma, for biological control of black rot. Cultivation broth samples and their filtrates were examined against seven Xanthomonas campestris strains, isolated from diseased cruciferous plants, using the diffusion-disc method. Bacillus velezensis has showed the highest inhibition zone diameter of 35.62?3.76 mm. Afterwards different combinations of carbon and nitrogen sources were used in cultivation medium to maximize antagonistic activity of Bacillus velezensis. The best combinations were glycerol and yeast extract, lactose and peptone, as well as sucrose and yeast extract, suggesting the potential of biodiesel, dairy and sugar industry effluents in the production of bioactive compounds effective against the black rot pathogen. Validation experiment was performed in a laboratory-scale bioreactor, in order to investigate bioprocess kinetics of biomass growth and carbon source consumption, using cultivation medium containing the optimal carbon and nitrogen source.

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Dissertations / Theses on the topic "Yeast bioprocess"

1

Kgari, Gail Lorato. "Understanding the effect of cold stress on brewers' yeast quality." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/5306.

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2

Daramola, Mofoluwake M. "The effect of agitation on brewers' yeast (Saccharomyces cerevisiae) quality." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/5372.

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3

Yeung, Ken Shu Ying. "Near infrared spectroscopy technique for bioprocess monitoring and control." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286892.

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4

Reynders, Michael Barry. "Studies on growth, modelling and pigment production by the yeast Phaffia rhodozyma." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/21500.

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Bibliography: pages 117-123.<br>Within the aquaculture industry a potential has been identified for the pigment astaxanthin. Astaxanthin is the carotenoid responsible for the distinctive coloration of salmonids, crustaceans and certain birds. Due to the fact that animals cannot synthesize carotenoids themselves, it is necessary for these pigments to be present in their food source. In the case of farm-raised salmonids and crustaceans, supplementation of their food with astaxanthin is required. The chemical synthesis of astaxanthin is very costly and complicated. As a result natural, microbial sources of astaxanthin are being investigated. Phaffia rhodozyma is the only yeast known to synthesize astaxanthin as its principle carotenoid. The aim of this dissertation is to present a study investigating the growth and pigmentation of P. rhodozyma, with a view to its commercial production. A P. rhodozyma mutant (UCT-1 N-3693) with a 50% increased total carotenoid content was selected after NTG mutagenesis of the wild strain.

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Pickering, Mark. "Studies on growth and filtration of the antagonistic biocontrol yeast Cryptococcus albidus." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/12792.

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Includes bibliographical references.<br>A high filtration resistance has been found to hinder the dewatering of the antagonistic biocontrol yeast Crytococcus albidus. Throught literature a hypothesis was developed that the extracellular polysaccharide produced by C. albidus is the major cause of hindrance to the filtration process. Microscopic analysis of C. albidus cultures illustrated cell-bound extracellular capsule. Viscosity measurements and visual observations of precipitation of the polysaccharide with ethanol were evidence extracellular polysaccharide suspended in the surrounding media. In this study, alteration of the composition of the growth medium and various pre-filtration treatments of the yeast harvest were investigated to improve filterability. The treatments included washing the yeast to remove suspended macromolecules, exposing the yeast suspension to a high shear environment to reduce the quantity of cell-bound polysaccharide, and varying suspension temperature. Us of Saccharomyces cerevisiae (Baker's yeast) and diatomaceous earth (DAE) as filter aids were investigated as a means of further improving filterability.

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6

Sibanda, Mkhululi Benedict. "Impact of molasses quality on ethyl alcohol fermentation by the yeast saccharomyces cerevisiae." Thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/5398.

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The use of blackstrap cane molasses in industrial ethanol production is characterised by fluctuations in fermentation efficiency due to its compositional variation. Crucial to optimisation of ethanol production is thorough knowledge of the constituents and properties of molasses which affect fermentation, in order to implement measures to diminish negative and augment positive impacts. These include both major and minor constituents. According to literature, aspects of fermentation media which affect yeast fermentation include nutritional availability, the presence of trace elements and growth factors such as vitamins, without which yeast proliferation is inhibited. High osmotic pressures, found in VHG (very high gravity) fermentations, have a detrimental effect on the fermentation process. Additionally, elevated concentrations of inorganic salts and ionic strength in industrial fermentation media have been implicated in negatively affecting fermentation. Based on these limited literature findings, the study addressed the effect of three cation constituents of molasses (K+, Mg2+ and Na+), expressed in terms of overall concentration, osmotic pressure and ionic strength, on fermentation was investigated in molasses media and a sucrose-based media.

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7

Zizhou, Njodzi. "Studies on the fed-batch propagation of brewer's yeast in high gravity wort." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/9751.

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Includes bibliographical references.<br>The traditional batch brewing process is characterised by serial yeast propagation to build sufficient yeast for pitching. This results in cyclic variations in yeast environment, leading to a slow brewing process. In high gravity brewing the carbohydrate utilisation is inefficient as a result of the Crabtree effect that occurs in the presence of high sugar concentration. When optimising the brewing process the characteristics of conventional batch brewing should be maintained. Fed-batch propagation of yeast is used to improve carbohydrate utilisation and the yeast biomass formation by controlling nutrient supply.

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8

Basson, Lauren. "Loss of yeast quality during mechanical handling in a brewery : an investigation of cropping." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/21829.

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Bibliography: pages [167]-176.<br>In large scale brewing operations, process efficiency and beer quality rely on consistent fermentations. Improper handling of yeast may result in slow or incomplete fermentations and beer of unacceptable quality. The maintenance of yeast quality during yeast handling is therefore crucial. Current guidelines for yeast handling, plant design and equipment specifications are based predominantly on empirical knowledge. The effects of different equipment, flow conditions and physical conditions to which brewery yeast is exposed are largely unknown. Hence, South African Breweries (SAB) requested a study on the possible damage to yeast (loss of yeast quality) during mechanical handling in a brewery. The investigation detailed in this thesis was limited to mechanical handling of yeast during cropping (the transfer of yeast from a fermentation vessel to a storage vessel for re-use) and had the following objectives: to assess the potential for a loss of yeast quality during the mechanical handling in a brewery, to select and validate analytical techniques for the identification, characterisation and quantification of a loss of yeast quality, to characterise and quantify the loss of yeast quality during yeast cropping in a brewery.

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9

Randone, P. "Bioprocess studies of biomass and recombinant protein production by the methylotrophic yeast Pichia pastoris." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1456760/.

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Pichia pastoris (P. pastoris) expression systems are gaining increased interest in industry due to their ability to achieve high cell densities and production levels. This thesis aims to characterise the following critical elements of P. pastoris upstream bioprocessing: cell growth, cell productivity and bioprocess monitoring. Methanol is the principle carbon source and gene expression induction agent in most P. pastoris fermentation strategies. Monitoring of methanol levels during fermentation enables cell growth and productivity to be optimised, whilst methanol toxicity is avoided. A novel approach to at-line methanol monitoring was investigated, seeking to exploit the chromogenic reactivity of dehydroascorbic acid (DHAA) with methanol. Recombinant variants of the human reporter enzyme, placental alkaline phosphatase (PLAP) were used as a model fermentation product, and the performance of two mechanistically distinct commercial assays was compared for their applicability to high cell density process streams. In total four new P. pastoris strains expressing PLAP variants were successfully created and the impact of methanol carbon source feed strategies on the strain performance investigated in terms of growth rate and recombinant protein production. A 2-fold increase in rate of methanol feed resulted in a final biomass increase of about 40% and in a volumetric productivity decrease of about 75%. A novel method, combining phases of low and high methanol feed rates, matched but did not exceed conventional methanol feed rate strategies.

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Matos, J?ssica Pereira de. "Fermenta??o alco?lica de hidrolisado ?cido obtido da torta de girassol utilizando as linhagens Galactomyces geotrichum UFVJM-R10 e Candida akabanensis UFVJM-R131." UFVJM, 2017. http://acervo.ufvjm.edu.br/jspui/handle/1/1737.

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Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-06-28T22:53:24Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) jessica_pereira_matos.pdf: 1785661 bytes, checksum: f5dbf30e3ce913eae470d1e958272e42 (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-07-18T12:52:05Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) jessica_pereira_matos.pdf: 1785661 bytes, checksum: f5dbf30e3ce913eae470d1e958272e42 (MD5)<br>Made available in DSpace on 2018-07-18T12:52:05Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) jessica_pereira_matos.pdf: 1785661 bytes, checksum: f5dbf30e3ce913eae470d1e958272e42 (MD5) Previous issue date: 2017<br>Na produ??o do bioetanol lignocelul?sico, as hexoses provenientes da celulose s?o fermentadas a etanol por muitos micro-organismos que ocorrem naturalmente. Entretanto, as pentoses, provenientes da hidr?lise da hemicelulose, como xilose e arabinose, s?o fermentadas a etanol por poucas esp?cies selvagens conhecidas e com baixos rendimentos. H?, portanto, necessidade de sele??o de estirpes de leveduras que sejam capazes de fermentar pentoses e glicose conjuntamente e de forma eficiente. Neste estudo, duas linhagens de leveduras, Candida akabanensis UFVJM-R131 e Galactomyces geotrichum UFVJM-R10, foram avaliadas na fermenta??o alco?lica da fra??o hemicelul?sica de torta de girassol solubilizada por hidr?lise com ?cido dilu?do. A hidr?lise da hemicelulose foi realizada misturando-se 31% de biomassa seca em solu??o de H2SO4 a 6%, que foi mantida por 38 minutos a temperatura de 121?C a 1 atm. A caracteriza??o cromatogr?fica do hidrolisado obtido revelou a exist?ncia de glicose (7,57 g L-1), xilose (19,53 g L-1) e arabinose (8,85 g L- 1), al?m de 5-hidroximetilfurfural (0,71 g L-1), furfural (0,05 g L-1) e ?cido ac?tico (5,27 g L- 1). Ambas as leveduras mostraram-se capazes de produzir etanol a partir do hidrolisado ?cido da torta de girassol. Os processos conduzidos com as leveduras G. geotrichum UFVJM-R10 e C. akabanensis UFVJM-R131 apresentaram valores de YP/S de 0,29 e 0,27 g etanol g-1 a??cares, respectivamente. As quantidades dos inibidores identificados no hidrolisado n?o afetaram a efici?ncia da fermenta??o alco?lica. A suplementa??o do hidrolisado com fontes de nitrog?nio e minerais aumentou a taxa de consumo da xilose e da arabinose. Os resultados obtidos permitiram concluir que as linhagens G. geotrichum UFVJM-R10 e C. akabanensis UFVJMR131 possuem potencial para a produ??o de bioetanol a partir da fra??o hemicelul?sica de biomassas vegetais.<br>Disserta??o (Mestrado) ? Programa de P?s-gradua??o em Biocombust?veis, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017.<br>In the production of bioethanol lignocellulosic, the hexose from cellulose are fermented to ethanol by many microorganisms that occur naturally. Though, the pentoses from hemicellulose hydrolysis, as xylose and arabinose, are fermented to ethanol by few known wild strains. This fact point the need to select strains of yeasts capable of ferment pentoses and glucose together more efficiently. In the present study, two lineages of yeast, Candida akabanensis UFVJM-R131 and Galactomyces geotrichum UFVJM-R10, were evaluated on alcoholic fermentation of hemicellulosic fraction from sunflower cake solubilized by hydrolysis with dilute acid. The hydrolysis of hemicellulose was performed utilizing 31% of dry biomass in H2SO4 at 6% under 121?C and pressure at 1 atm for 38 minutes. Chromatographic characterization of the hydrolyzate obtained showed the presence of glucose (7.57 g L-1), xylose (19.53 g L-1) and arabinose (8.85 g L-1), besides 5-hydroxymethylfurfural (0.71 g L-1), furfural (0.05 g L-1) and acetic acid (5.27 g L-1). Both yeasts were able to produce ethanol from the acidic hydrolyzate. The fermentation carried out with G. geotrichum UFVJM-R10 and C. akabanensis UFVJM-R131 presented YP/S values of 0.29 and 0.27 g ethanol g-1sugars, respectively. The amounts of the inhibitors identified in the hydrolyzate did not affect the efficiency of the alcoholic fermentation. The supplementation of the hydrolyzate with nitrogen and mineral sources increased the rate of consumption of xylose and arabinose. The results obtained allowed to conclude that the strains G. geotrichum UFVJM-R10 and C. akabanensis UFVJM-R131 have potential for the production of bioethanol from vegetal hemicellulosic fraction.

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Books on the topic "Yeast bioprocess"

1

Magid, Andy R. Separable Galois theory of Commutative Rings, Second Edition (Bioprocess Technology). 2nd ed. CRC, 2009.

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Luiz Alves, Sérgio, Helen Treichel, Thiago Olitta Basso, and Boris Ugarte Stambuk, eds. Yeasts: From Nature to Bioprocesses. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/97898150510631220201.

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Alves, Sérgio Luiz. Yeasts: From Nature to Bioprocesses. Bentham Science Publishers, 2022.

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Alves, Sérgio Luiz, Helen Treichel, and Thiago Olitta Basso. Yeasts: From Nature to Bioprocesses. Bentham Science Publishers, 2022.

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Alves, Sérgio Luiz. Yeasts: From Nature to Bioprocesses. Bentham Science Publishers, 2022.

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Book chapters on the topic "Yeast bioprocess"

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de la Torre, M., L. B. Flores, and E. Chong. "High Cell Density Yeast Production: Process Synthesis and Scale-Up." In Advances in Bioprocess Engineering. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0641-4_9.

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Griot, Martin, Jochen Kuhla, Gabriele Fendrich, and Martin T. Küenzi. "Optimization of Interferon Production in Yeast by Strict Ethanol Control." In Advances in Bioprocess Engineering. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-0643-8_7.

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Zalewski, K., P. Götz, and R. Buchholz. "On-Line Estimation of Yeast Growth Rate Using Morphological Data from Image Analysis." In Advances in Bioprocess Engineering. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0641-4_26.

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Chuo, H. S. E., M. K. Tan, H. J. Tham, and K. T. K. Teo. "Q-Learning-Based Controller for Fed-Batch Yeast Fermentation." In Developments in Sustainable Chemical and Bioprocess Technology. Springer US, 2013. http://dx.doi.org/10.1007/978-1-4614-6208-8_28.

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Chang, Y. K., G. E. McCreath, and H. A. Chase. "Purification of G6PDH from Unclarified Yeast Cell Homogenate Using Expanded Bed Adsorption (EBA) with STREAMLINETM Red H-E7B." In Advances in Bioprocess Engineering. Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0641-4_72.

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Shimizu, Hiroshi, Sunao Egawa, Agustin K. Wardani, Keisuke Nagahisa, and Suteaki Shioya. "Microbial Interaction in a Symbiotic Bioprocess of Lactic Acid Bacterium and Diary Yeast." In Biologically Inspired Approaches to Advanced Information Technology. Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11613022_10.

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Effler, William T., Robert D. Tanner, and George W. Malaney. "Dynamic In-Situ Fractionation of Extracellular Proteins Produced in a Baker’s Yeast Cultivation Process." In Bioproducts and Bioprocesses. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74227-9_22.

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Kimura, Akira. "Formation of Jumbo Yeast Cells by Introduction of Methylglyoxal Resistant Genes, Development of New Vector for Wild or Industrially Used Cells." In Bioproducts and Bioprocesses. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74227-9_14.

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Bishop, Bruce F., and Stephen J. Lorbert. "The Needs for Sensors in Bacterial and Yeast Fermentations." In Sensors in Bioprocess Control. CRC Press, 2020. http://dx.doi.org/10.1201/9781003066408-1.

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Turcotte, G., and N. Kosaric. "Lipid Biosynthesis in Oleaginous Yeasts." In Bioprocesses and Engineering. De Gruyter, 1989. http://dx.doi.org/10.1515/9783112568781-003.

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Conference papers on the topic "Yeast bioprocess"

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Anschau, Andréia, and Telma Teixeira Franco. "CONTINUOUS CULTIVATIONS OF THE OLEAGINOUS YEAST LIPOMYCES STARKEYI." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-31774.

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Martinez, Adalgisa, Ivana Cavello, Amalia Gonzalez, et al. "SCREENING AND ISOLATION OF COLD ADAPTED YEAST PRODUCING INDUSTRIALLY IMPORTANT ENZYMES." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-32470.

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Reis, Alexandre Libanio Silva Reis, Emmanuel Dutra, Marcos Antonio de Morais Júnior, Raquel de Fátima Rodrigues de Souza та Patrícia Paiva. "β-glucosidase activity in the yeast Dekkera/Brettanomyces bruxellensis and implications for production of second-generation ethanol". У Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-31636.

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Antunes, Felipe, Thaís Milessi, Anuj Kumar Chandel, et al. "BIOETHANOL PRODUCTION IN FLUIDIZED BED REACTOR BY THE YEAST Scheffersomyces shehatae UFMG-HM 52.2 IMMOBILIZED ON Ca-ALGINATE MATRIX." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-32515.

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Braga, Cíntia, Caroline dos Santos, Jorge Luiz Ninow, et al. "PROFILE AND CONSUMPTION OF AMINO ACIDS IN CIDER FERMENTATION BY DIFFERENT YEASTS STRAINS." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-33494.

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Corvello, Enzo, Sandro Roberto Valentini, Cleslei Fernando Zanelli, and Tatiana Maria de Souza Moreira. "Emprego da técnica Yeast-ELISA para a detecção do domínio de ligação do receptor (RBD) de SARS-CoV-2." In XI Congresso Farmacêutico e VII Jornada de Engenharia de Bioprocessos e Biotecnologia. Softaliza Tecnologias LTDA, 2023. http://dx.doi.org/10.55592/jfunesp.2023.5152325.

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Reports on the topic "Yeast bioprocess"

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Castillo Saldarriaga, Carlos, and Martha Gómez Álvarez. Selection of filtering agent and filter cloth to separate cells of probiotic yeast using a monophasic filter system. Corporación colombiana de investigación agropecuaria - AGROSAVIA, 2018. http://dx.doi.org/10.21930/agrosavia.poster.2018.4.

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Abstract:

The efficiency of separation operations is a critical point to determinate the yield and economic viability of a production process. Because of this, the selection of adequate operation parameters has become an important part in the design of a new bioprocess. [1, 2]. Due to its low cost and easily transformation to industrial scale, the cross-flow filtration had been highly studied in terms of process performances of microorganism biomass separation without being concerned about their viability. In this work, two parameters of cross-flow filtration were evaluated to separate yeast cells from fermented broth. Meyerozyma guilliermondii was the reference biology system used in the experiments [3]. First, an evaluation of the compatibility of two filtering agents over yeast cells was conducted. After the filtering agent was selected, the efficiency of separation was determined over different filter cloth on a monophasic filter system.

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