Inviting an author to review:
Find an author and click ‘Invite to review selected article’ near their name.
Search for authorsSearch for similar articles
39
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      EVALUATION OF ETHANOL PRODUCTION FROM TWO RECOMBINANT AND A COMMERCIAL STRAINS OF SACCHAROMYCES CEREVISIAE (FUNGI: ASCOMYCOTA) IN SUGAR-CANE MOLASSES AND REJECTED-BANANA JUICE FROM URABÁ (ANTIOQUIA), COLOMBIA Translated title: EVALUACIÓN DE LA PRODUCCIÓN DE ETANOL POR DOS CEPAS RECOMBINANTES Y UNA COMERCIAL DE SACCHAROMYCES CEREVISIAE (FUNGI: ASCOMYCOTA) EN MELAZA DE CAÑA DE AZÚCAR Y MOSTOS DE BANANO DE RECHAZO DE URABÁ (ANTIOQUIA), COLOMBIA

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The production of bioethanol using Saccharomyces cerevisiae (Fungi: Ascomycota) is influenced by sugar concentration and fermentation substrate. For that reason, the kinetics of biomass production, residual sugars, and ethanol production of four of S. cerevisiae strains were evaluated in two different fermentation media (sugar-cane molasses and rejected-banana juice) at two different sugar concentrations (100 and 170 g/l). The EthanolRed® and GG570-CIBII strains exhibited the greatest ethanol production, with peak values of 119.74 (35 h) and 62 g/l (15 h), Yps 0.75 and 0.43 g/g, and Qp 3.42 and 2.61 g/l/h, respectively, at 170 g/l of sugar in sugar-cane molasses broth. Additionally, the strain GG570-CIBII showed an increase of 37.1 g/l ethanol with respect to the control strain.

          Translated abstract

          La producción de bioetanol a partir de Saccharomyces cerevisiae (Fungi: Ascomycota) está influenciada por la concentración de azúcares y el sustrato de fermentación. Por ello en este trabajo se evaluaron las cinéticas de producción de biomasa, azúcares residuales y producción de etanol de cuatro cepas de S. cerevisiae en dos medios de fermentación (melaza de caña de azúcar y banano de rechazo) a dos concentraciones de azúcares (100 y 170 g/l). Las cepas EthanolRed® y GG570-CIBII presentaron mayor producción de etanol con pico de producción de 119,74 (35 h) y 62 g/l (15 h), Yps 0,75 y 0,43 g/g y, Qp 3,42 y 2,61 g/l/h, respectivamente a 170 g/l de azúcares en melaza de caña de azúcar. Adicionalmente, la cepa GG570-CIBII mostró un incremento de 37,1 g/l de etanol con respecto a la cepa control.

          Related collections

          Most cited references23

          • Record: found
          • Abstract: found
          • Article: not found

          Trends in biotechnological production of fuel ethanol from different feedstocks.

          Present work deals with the biotechnological production of fuel ethanol from different raw materials. The different technologies for producing fuel ethanol from sucrose-containing feedstocks (mainly sugar cane), starchy materials and lignocellulosic biomass are described along with the major research trends for improving them. The complexity of the biomass processing is recognized through the analysis of the different stages involved in the conversion of lignocellulosic complex into fermentable sugars. The features of fermentation processes for the three groups of studied feedstocks are discussed. Comparative indexes for the three major types of feedstocks for fuel ethanol production are presented. Finally, some concluding considerations on current research and future tendencies in the production of fuel ethanol regarding the pretreatment and biological conversion of the feedstocks are presented.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Fermentation of molasses by Zymomonas mobilis: effects of temperature and sugar concentration on ethanol production.

            Fermentations utilizing strains of Zymomonas mobilis, in place of the traditional yeasts, have been proposed due their ethanol yields being close to theoretical. Ethanol production from sugar cane molasses was analyzed under different culture conditions using Z. mobilis in batch fermentation. The total reducing sugars (TRS) concentrations in the molasses, temperature, agitation and culture time effects were studied simultaneously through factorial design. The best conditions for ethanol production were 200 g L(-1) of total reducing sugars in the molasses, temperature of 30 degrees C and static culture and time of fermentation of 48 h, achieving 55.8 g L(-1). The pH of the medium was kept constant during the experiments, showing that molasses presents a buffering effect.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              A biochemically structured model for Saccharomyces cerevisiae.

              A biochemically structured model for the aerobic growth of Saccharomyces cerevisiae on glucose and ethanol is presented. The model focuses on the pyruvate and acetaldehyde branch points where overflow metabolism occurs when the growth changes from oxidative to oxido-reductive. The model is designed to describe the onset of aerobic alcoholic fermentation during steady-state as well as under dynamical conditions, by triggering an increase in the glycolytic flux using a key signalling component which is assumed to be closely related to acetaldehyde. An investigation of the modelled process dynamics in a continuous cultivation revealed multiple steady states in a region of dilution rates around the transition between oxidative and oxido-reductive growth. A bifurcation analysis using the two external variables, the dilution rate, D, and the inlet concentration of glucose, S(f), as parameters, showed that a fold bifurcation occurs close to the critical dilution rate resulting in multiple steady-states. The region of dilution rates within which multiple steady states may occur depends strongly on the substrate feed concentration. Consequently a single steady state may prevail at low feed concentrations, whereas multiple steady states may occur over a relatively wide range of dilution rates at higher feed concentrations.
                Bookmark

                Author and article information

                Journal
                acbi
                Actualidades Biológicas
                Actu Biol
                Instituto de Biología, Universidad de Antioquia (Medellín, Antioquia, Colombia )
                0304-3584
                June 2012
                : 34
                : 96
                : 21-31
                Affiliations
                [02] Medellín Antioquia orgnameCorporación para Investigaciones Biológicas orgdiv1Unidad de Biotecnología Vegetal Colombia
                [01] Medellín Antioquia orgnameUniversidad de Antioquia orgdiv1Grupo Interdisciplinario de Estudios Moleculares Colombia
                Article
                S0304-35842012000100002 S0304-3584(12)03409602
                03b1d144-239f-4a39-86b5-17cda1157869

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : April 2012
                : September 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 23, Pages: 11
                Product

                SciELO Colombia

                Categories
                Research articles

                pdc gene,sugar-cane molasses,rejected-banana juice,recombinant Saccharomyces cerevisiae,melaza de caña de azúcar,jugo de banano de rechazo,bioetanol,gen adhII,gen pdc,Saccharomyces cerevisiae recombinante,adhII gene,bioethanol

                Comments

                Comment on this article