Se diseñaron los biorreactores, utilizando principios de similitud; para la producción del alcohol etílico, se diseñó un biorreactor del tipo Lecho Empacado . Inmovilización de levaduras en residuos lignocelulósicos para la producción de etanol en biorreactor de lecho empacado. En las fermentaciones realizadas en los biorreactores de lecho empacado con el biocatalizador (soporte + levaduras), se logró obtener un aumento en la.

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Biomass quantification Protocol dry weight modified technique After completion ofthe 12 hours of immobilization baseline, the biomass quantification process developed was as follows: Brazilian Journal of Chemical Engineering.

We kindly thank the Biotechnology and Biotransformation Groups of the Universidad de Antioquia for their support. We studied various techniques spectrophotometry, protein quantification and dry weight ; the better results were obtained with the dry weight technique, which was modified to allow direct quantification of biomass immobilized on the carrier.

Fill out the form below to receive a free trial or learn more about access: Ciudad Universitaria Calle 67 No. The response variables evaluated in this study were the reduced sugars consumption, and ethanol production.

In the following investigation project titled ” Design and Operation of Biochemical Reactors for obtaining metabolites of Ethylic Alcohol and Citric Acid at the laboratory” was carried out at the Industrial Microbiology laboratories from the Biological Sciences faculty, Analytic Chemistry and Biochemistry laboratories from the Chemical Engineering faculty at the National University of Trujillo from October to Junewhich purpose was to establish a bioreactors design for producing metabolites of ethylic alcohol and citric acid by fermentation under a variety of conditions using a common substrate, which was the molasses.

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Conclusions In this study we developed a protocol for quantification of immobilized biomass on lignocellulosic carriers and we obtained reproducible results. We have obtained better yields than the batch processes, currently being used on an industrial level. Recibido el 5 de abril de The size of the carrier selected was 3. Apriete el tubo para asegurar que todo el aire ha sido expulsado. Figure 4 presents the results of the images obtained from scanning electron micrographs SEM.

Ajuste la bomba a 25 revoluciones min -1, estableciendo un caudal de 1,5 ml min We used a CH column mepacado an internal diameter of 7.


Carriers for immobilization The lignocellulosic waste used were wood shaving, cane bagasse, corn leave, and corn cob, which were obtained from some agro industries in biotreactor region. We also evaluated the glucose syrup obtained from cassava flour as an alternative substrate.

The fermentation which produced the highest amount of ethanol was the one using corn cobs as a carrier. Based on these results, we chose the sugar cane bagasse as the carrier for immobilization in fermentation conditions. This study is focused on the development of an immobilization process of yeast cells in waste fe materials and their evaluation in the ethanol production by using packed bed bioreactors.

For flow rate we considered the specifications of peristaltic pumps available in the laboratory and the residence time established previously in the bioreactor used. The parameters obtained in the batch process are shown in Table 1.

Based on these results we chose the biomass quantification protocol modified dry weight treatment biorreactor, that uses NaOH 0.

The ethanol concentration biorrfactor determined by HPLC, by analyzing samples of the effluent of the reactors. An important result in this experimentation was the confirmation of reproducibility of operational conditions of fermentations and stability of packed bed system during operation time. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

Figure 2 shows the material upon completion of the process of conditioning.

In this work, we evaluated the continuous production of ethanol in packed-bed reactors with yeast cells immobilized on wood shaving, cane bagasse, corn leave, and corn cob lignocellulosic waste. Utilizando las gradaciones en el reactor, determine la bi algasaltura de la zona omass. Due to heterogeneity in nature and origin of agro-industrial waste used in the experiment, and to avoid interference in the subsequent process of cell immobilization, it was necessary to establish a cleaning treatment and adapting materials.

Enzyme Microbiology and Technology. Morphology of stabilized and hardened calcium pectate gel beads with Immobilized cells for biotechnology”. This is possibly due to the fact that glucose syrup contains other fermentable sugars such as maltose. The established time of residence t was 3 h, and the reactor was operated this way for 6 times of residence 18 h.

Se evaluaron cuatro diferentes residuos de materiales lignocelulosicos: Proceedings of the European Brewing Convention Congress.

Un biorreactor Novela de alta densidad de cultivo de diversas comunidades microbianas

The productivity reached was The experimental design analysis using Design Expert software allowed us to establish that there is no significant statistical difference between treatments. Journal of Agricultural of Food Chemistry.


We noticed that the system stabilizes when it passes the fourth time of residence 4 t. Reunir un gran volumen al menos 10 L de agua de un cuerpo de agua que contiene algas, tales como una corriente o estanque. The highest concentration of ethanol was reached in the fermentation that used the cane bagasse as a carrier. Before starting the continuous process, we carried out the stages of cell immobilization and batch fermentation previously described. We used glucose as a carbon source to establish the reference conditions and we made the fermentations with commercial sucrose.

The high variability in each of the treatments for different materials is indicated by the high deviations values and it is confirmed by the lack of statistical significance. In the fermentations performed with glucose syrup, a higher amount of ethanol lechoo obtained in the process that used corn cob as the carrier. Results and discussion Due to heterogeneity in nature and origin of agro-industrial waste used in the experiment, and to avoid interference in the subsequent process of cell immobilization, it was necessary to establish a cleaning treatment and adapting materials.

However, this method of immobilization is not too viable on an industrial scale, due to the high cost of raw material and the relative complexity of preparation of the biocatalysts carrier-cell with respect to the operative lifetime of the process [4,21,14]. This demonstrates that if empacavo investigations are carried out to establish the best times for the immobilization process and the best fermentation conditions, high yields of ethanol production can be reached by using immobilized cells in the carriers studied.

An important result empacadoo from the experimental design, is about selection of the best material for cell immobilization. Table 3 presents the consolidated experiments matrix with the results obtained. Batch fermentation Once the immobilization process in the column bioreactor was finished, we began the batch fermentation by pumping the medium fermentation until the reactor filled up.