Adrián González-Leos’s research while affiliated with Autonomous University of Tamaulipas and other places

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Publications (3)


Fig. 1. Dynamics of the fermentation for experiments conducted with hydrolysates not concentrated and L. pentosus. When the hydrolysates were not concentrated (medium 1), the media composition was of 30.77 g of xylose/L; 3.34 g of glucose/L and 0.20 g of arabinose/ L. Laopaiboon et al. (2010) reached concentrations of xylose, 22.59 gL −1 whereas González et al. (2017) obtained 24.79 gL −1 of xylose and Tizazu and Moholkar (2018) that reported values below the ones reached in this study with a concentration of xylose of 9.2 gL −1 with sugarcane bagasse.
Fig. 2. Fermentation dynamics for experiments performed with concentrated hydrolysates at a FV/IV ratio: 1/1.33, using L. pentosus.
Fig. 3. Fermentation dynamics for experiments performed with concentrated hydrolysates at a FV/IV ratio: 1/2, using L. pentosus.
Chemical composition of sugarcane bagasse.
Composition of synthetic media and hydrolysates obtained at different concentration levels.
KINETICS OF LACTIC ACID FERMENTATION FROM SUGARCANE BAGASSE BY Lactobacillus pentosus
  • Article
  • Full-text available

August 2019

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544 Reads

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28 Citations

Revista Mexicana de Ingeniería Química

A. González-Leos

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A. Del Ángel-Del Ángel

Sugarcane bagasse is a residue of the sugar industry that presents a high content of hemicelluloses being one of the most abundant and available agricultural residues in Mexico with great potential to be used in fermentations. The bagasse was characterized and chemically treated to obtain samples of hydrolysates which were supplemented with nutrients and fermented with Lactobacillus pentosus to obtain lactic acid. The hydrolysates were vacuum evaporated to increase the initial concentration of sugars until obtain 7.77 gL-1 of glucose, 64.25 gL-1 of xylose and 3.67 gL-1 of arabinose. Under these conditions, lactic acid values were reached 55.437 gL-1 (QP= 0.430 gL-1h-1, YP/S= 0.724 gg-1; YP/S theoretical=81.43%) observing a clear inhibition of the product after 120 hours. The aim of this work was the development of fermentation kinetics for the biotechnological obtaining of lactic acid from sugarcane bagasse hydrolysates concentrated and not concentrated with L. pentosus.

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Figura 2. Cinética de crecimiento de la cepa nativa UAT-3, en hidrolizado de bagazo de caña de azúcar y su control (Medio YPD). Figure 2. Cell concentration of the native strain UAT-3, in hydrolyzate sugar cane bagasse and control (YPD media).
Figura 3. Cinética de producción de etanol y consumo de sustrato por la cepa nativa UAT-3 en hidrolizado de bagazo de caña de azúcar. Figure 3. Kinetics of ethanol production and substrate consumption by the native strain UAT-3 in hydrolyzate sugar cane bagasse.
Evaluation of producing ethanol native yeasts present in sugar cane bagasse

June 2017

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80 Reads

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3 Citations

CienciaUAT

The chemical or enzymatic hydrolysis of sugar cane bagasse, allows the obtaining of fermentable sugars used in the biotechnological production of ethanol by using commercial or native yeasts obtained from different lignocellulosic materials. The purpose of this study was to assess the production capacity of ethanol from a native yeast strain isolated in YPD and hydrolyzed sugar cane bagasse concentrated up to 75 %. Using as study variables the type of strain and processing time, a multivariate analysis (ANOVA) was performed for its evaluation. The results achieved with the selected strain UAT-3, were 0.441 7 g/g for Yp/s and 0.076 7 g/L-h to 120 h for QP. The process conditions used in the present study allowed to isolate and select native strains of Sacharomyces cereviseae, with characteristics suitable to be used in industrial biotechnological proceses of ethanol production, using as substrate residues or by-products derived from the sugar industry such as bagasse of sugar.


Evaluación de levaduras nativas productoras de etanol presentes en el bagazo de caña de azúcar

January 2017

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63 Reads

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3 Citations

CienciaUAT

La hidrólisis química o enzimática del bagazo de caña de azúcar permite la obtención de azúcares fermentables, utilizados en la producción biotecnológica de etanol, mediante el empleo de levaduras comerciales o autóctonas obtenidas de diferentes materiales lignocelulósicos. El objetivo de este trabajo fue valorar la capacidad de producción de etanol de cepas de levaduras nativas, aisladas en medio YPD e hidrolizado de bagazo de caña de azúcar, concentrado hasta un 75 %. Utilizando como variables de estudio el tipo de cepa y el tiempo de proceso, se realizó un análisis multifactorial (ANOVA) para su evaluación. Los resultados obtenidos con la cepa seleccionada UAT-3, fueron para YP/S de 0.441 7 g/g y QP de 0.076 7 g/L·h a las 120 h. Las condiciones de proceso utilizadas en el presente estudio permitieron aislar y seleccionar cepas nativas de Sacharomyces cereviseae, con características adecuadas para ser utilizadas en procesos biotecnológicos industriales de producción de etanol, utilizando como sustrato residuos o subproductos derivados de la industria azucarera como el bagazo de caña de azúcar.

Citations (2)


... When the substrate is overloaded, this may hinder lactic acid production, possibly due to substrate inhibition (Dumbrepatil et al. 2008). This is because high substrate concentrations may prolong the lag phase, induce osmotic stress, cause cellular lysis, and reduce the microbial activity (González-Leos et al. 2019). ...

Reference:

Anaerobic bio-processing of agricultural waste for the biotechnological production of lactic acid and volatile fatty acid by landfill soil inoculums
KINETICS OF LACTIC ACID FERMENTATION FROM SUGARCANE BAGASSE BY Lactobacillus pentosus

Revista Mexicana de Ingeniería Química

... The saccharification process for the best scenario (using the dilute acid pretreatment assay) reached a glucose concentration of 31.52 ± 2.36 g/L and a glucose yield of 0.42 ± 0.03 g glucose/g of BNCS on a dry basis. In comparison, Mukasekuru et al. [25] performed enzymatic saccharification from [28] pretreated sugarcane bagasse, obtaining a glucose concentration of 72 g/L. Thus, the low saccharification performance of the process obtained in this study, affects the economic performance of the production process since more enzymes are needed (costs are increased) and low bioethanol production yields will be obtained. ...

Evaluación de levaduras nativas productoras de etanol presentes en el bagazo de caña de azúcar

CienciaUAT