Kinetics of Ethanol Fermentation with High Biomass Concentration Considering the Effect of Temperature

Atala, Daniel Ibraim Pires; Costa, Aline Carvalho da; Maciel, Rubens; Maugeri, Francisco

doi:10.1385/abab:91-93:1-9:353

Cited by 72 publications

(35 citation statements)

References 13 publications

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“…Cell concentration was determined by dry weight [17]. Samples were taken from the fermentation media at certain time intervals and centrifuged at 6,000 rpm for 15 min in a BE-6000 centrifuge (BIO ENG, Piracicaba, SP, Brazil).…”

Section: Biomassmentioning

confidence: 99%

Enzymatic Hydrolysis and Fermentation of Pretreated Cashew Apple Bagasse with Alkali and Diluted Sulfuric Acid for Bioethanol Production

Rocha

Rodrigues

Macêdo

et al. 2008

Appl Biochem Biotechnol

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The aim of this work was to optimize the enzymatic hydrolysis of the cellulose fraction of cashew apple bagasse (CAB) after diluted acid (CAB-H) and alkali pretreatment (CAB-OH), and to evaluate its fermentation to ethanol using Saccharomyces cerevisiae. Glucose conversion of 82 +/- 2 mg/g CAB-H and 730 +/- 20 mg/g CAB-OH was obtained when 2% (w/v) of solid and 30 FPU/g bagasse was used during hydrolysis at 45 degrees C, 2-fold higher than when using 15 FPU/g bagasse, 44 +/- 2 mg/g CAB-H, and 450 +/- 50 mg/g CAB-OH, respectively. Ethanol concentration and productivity, achieved after 6 h of fermentation, were 20.0 +/- 0.2 g L(-1) and 3.33 g L(-1) h(-1), respectively, when using CAB-OH hydrolyzate (initial glucose concentration of 52.4 g L(-1)). For CAB-H hydrolyzate (initial glucose concentration of 17.4 g L(-1)), ethanol concentration and productivity were 8.2 +/- 0.1 g L(-1) and 2.7 g L(-1) h(-1) in 3 h, respectively. Hydrolyzates fermentation resulted in an ethanol yield of 0.38 and 0.47 g/g glucose with pretreated CAB-OH and CAB-H, respectively. Ethanol concentration and productivity, obtained using CAB-OH hydrolyzate, were close to the values obtained in the conventional ethanol fermentation of cashew apple juice or sugar cane juice.

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Section: Biomassmentioning

confidence: 99%

Enzymatic Hydrolysis and Fermentation of Pretreated Cashew Apple Bagasse with Alkali and Diluted Sulfuric Acid for Bioethanol Production

Rocha

Rodrigues

Macêdo

et al. 2008

Appl Biochem Biotechnol

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“…Cell concentration was determined by dry weight [10]. Samples were taken from the fermentation media at certain time intervals and centrifuged at 3,000 rpm for 30 min in a BE-6000 centrifuge (BIO ENG).…”

Section: Biomass Contentmentioning

confidence: 99%

Evaluation of Cashew Apple Juice for the Production of Fuel Ethanol

Pinheiro

Rocha

Macêdo

et al. 2008

Appl Biochem Biotechnol

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A commercial strain of Saccharomyces cerevisiae was used for the production of ethanol by fermentation of cashew apple juice. Growth kinetics and ethanol productivity were calculated for batch fermentation with different initial sugar (glucose + fructose) concentrations. Maximal ethanol, cell, and glycerol concentrations were obtained when 103.1 g L(-1) of initial sugar concentration was used. Cell yield (Y (X/S)) was calculated as 0.24 (g microorganism)/(g glucose + fructose) using cashew apple juice medium with 41.3 g L(-1) of initial sugar concentration. Glucose was exhausted first, followed by fructose. Furthermore, the initial concentration of sugars did not influence ethanol selectivity. These results indicate that cashew apple juice is a suitable substrate for yeast growth and ethanol production.

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“…Yeast concentration was determined by the dry weight method 14 . Ethanol content was determined by gas chromatography 15 and the fermentable sugars concentration was estimated using the 3,5-dinitrosalicylic acid method 16 .…”

mentioning

confidence: 99%

Investigation of the toxicity of the ionic liquid 1-butyl-3-methylimidazolium chloride to Saccharomyces cerevisiae AY93161 for lignocellulosic ethanol production

Zhu¹,

Yu²,

Lei³

et al. 2013

Polish Journal of Chemical Technology

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Ionic liquid (IL) pretreatment of lignocellulosic materials has provided a new technical tool to improve lignocellulosic ethanol production. To evaluate the infl uence of the residual IL in the fermentable sugars from enzymatic hydrolysis of IL pretreatment of lignocellulosic materials on the subsequent ethanol fermentation, the toxicity of the IL 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) to Saccharomyces cerevisiae AY93161 was investigated. Firstly, the morphological structure, budding and metabolic activity of Saccharomyces cerevisiae AY93161 at different Cl inhibited the growth and ethanol production of Saccharomyces cerevisiae AY93161. This toxicity study provides useful basic data for further development in lignocellulosic ethanol production by using IL technology and it also enriches the IL toxicity data.

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Kinetics of Ethanol Fermentation with High Biomass Concentration Considering the Effect of Temperature

Cited by 72 publications

References 13 publications

Enzymatic Hydrolysis and Fermentation of Pretreated Cashew Apple Bagasse with Alkali and Diluted Sulfuric Acid for Bioethanol Production

Enzymatic Hydrolysis and Fermentation of Pretreated Cashew Apple Bagasse with Alkali and Diluted Sulfuric Acid for Bioethanol Production

Evaluation of Cashew Apple Juice for the Production of Fuel Ethanol

Investigation of the toxicity of the ionic liquid 1-butyl-3-methylimidazolium chloride to Saccharomyces cerevisiae AY93161 for lignocellulosic ethanol production

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