Modeling and simulation of continuous extractive fermentation with CO2 stripping for bioethanol production

Rodrigues, Kaio C. S.; Sonego, Jorge Luíz Silveira; Cruz, Antonio José Gonçalves; Bernardo, André; Badino, Alberto Colli

doi:10.1016/j.cherd.2017.12.024

Cited by 31 publications

(21 citation statements)

References 34 publications

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“…One potential solution to reduce downstream separation costs and avoid ethanol inhibition would be to remove ethanol continuously from the bioreactor as it is being produced. ,, Direct contact evaporators (DCE, or direct contact heat exchangers) are well known for evaporating volatile components from mixtures and could be beneficial in fermenters as the heat and mass transfer processes are highly efficient within these units . Unlike traditional distillation, where the whole liquid is heated to its boiling point, DCE uses most of the input energy for evaporation of volatile components and keeps the liquid at the desired temperature.…”

Section: Introductionmentioning

confidence: 99%

Hot Microbubble Air Stripping of Dilute Ethanol–Water Mixtures

Calverley

Zimmerman

Leak³

et al. 2020

Ind. Eng. Chem. Res.

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Product inhibition and the cost of downstream separations are two main barriers in using lignocellulosic biomass for bioethanol production. If bioethanol can be continuously removed from fermentation broth without affecting the fermentation process, significant gains can be achieved with bioethanol yields and process efficiency. Hot microbubble clouds generated by energy efficient means have been used to remove ethanol from dilute ethanol−water mixtures (∼4% [v/v]) maintained at 60 °C, and the effect of key operating parameters on the stripping rate has been studied. Numerical simulations of a hot microbubble rising in a dilute ethanol−water mixture were also performed to understand the instantaneous concentrations within the gas phase. Increasing the inlet gas temperature from 90 to 150 °C and decreasing the liquid height in the unit from 50 to 5 mm both increased the ethanol stripping rate. However, the benefit of increasing the gas temperature for maximum ethanol removal depended on the liquid height in the unit. Under all operating conditions, ethanol concentration was reduced below ∼2% [v/v] within ∼25 min of operation, demonstrating the potential of hot microbubble stripping for product removal from lignocellulosic fermenters. Implemented effectively in a fermenter, this technology could intensify the bioethanol production process and improve process economics.

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Section: Introductionmentioning

confidence: 99%

Hot Microbubble Air Stripping of Dilute Ethanol–Water Mixtures

Calverley

Zimmerman

Leak³

et al. 2020

Ind. Eng. Chem. Res.

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“…Rodrigues and colleagues studied modeling and simulation of ethanol production from sugarcane using continuous extractive fermentation with CO 2 stripping [40]. The results indicated that the inhibition by the ethanol produced was reduced with this strategy.…”

Section: Techniques Used In Isprmentioning

confidence: 99%

In situ product recovery techniques aiming to obtain biotechnological products: A glance to current knowledge

Santos

Albuquerque

Ribeiro

et al. 2020

Biotech and App Biochem

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Biotechnology and bioengineering techniques have been widely used in the production of biofuels, chemicals, pharmaceuticals, and food additives, being considered a “green” form of production because they use renewable and nonpolluting energy sources. On the other hand, in the traditional processes of production, the target product obtained by biotechnological routes must undergo several stages of purification, which makes these processes more expensive. In the past few years, some works have focused on processes that integrate fermentation to the recovery and purification steps necessary to obtain the final product required. This type of process is called in situ product recovery or extractive fermentation. However, there are some differences in the concepts of the techniques used in these bioprocesses. In this way, this review sought to compile relevant content on considerations and procedures that are being used in this field, such as evaporation, liquid–liquid extraction, permeation, and adsorption techniques. Also, the objective of this review was to approach the different configurations in the recent literature of the processes employed and the main bioproducts obtained, which can be used in the food, pharmaceutical, chemical, and/or fuel additives industry. We intended to elucidate concepts of these techniques, considered very recent, but which emerge as a promising alternative for the integration of bioprocesses.

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“…Modelagem do Arraste de Etanol e Água: O processo de remoção de etanol e água por CO2 foi descrito pelo conjunto de equações diferenciais ordinárias, obtidas a partir dos balanços de massa de etanol, água e total conforme as Equações 1, 2 e 3, respectivamente (Rodrigues et al, 2017).…”

Section: Processo De Remoção De Etanolunclassified

Modelagem Da Remoção De Etanol E Água Por Arraste Com Co2: Efeito Da Temperatura Da Solução

Veloso¹,

Rodrigues²,

Sonego³

et al. 2018

Blucher Chemical Engineering Proceedings

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RESUMO -No presente estudo foram realizados experimentos com solução hidroalcoólica nas temperaturas de 26, 28, 30, 32 e 34 °C, promovendo o arraste de etanol utilizando CO2, a fim de estimar as constantes de remoção de etanol e água (kE e kW) do modelo proposto. Os experimentos foram iniciados com concentração de etanol (CE) de 120 g.L -1 e terminaram com aproximadamente 40 g.L -1 . Os dados experimentais de CE foram obtidos utilizando a técnica de espectroscopia de infravermelho médio por transformada de Fourier (FT-MIR). O modelo utilizado foi adequado para descrever o processo nas temperaturas estudadas e as constantes kE e kW aumentaram com o acréscimo da temperatura, porém não apresentaram variação com o decréscimo da concentração de etanol.

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Modeling and simulation of continuous extractive fermentation with CO2 stripping for bioethanol production

Cited by 31 publications

References 34 publications

Hot Microbubble Air Stripping of Dilute Ethanol–Water Mixtures

Hot Microbubble Air Stripping of Dilute Ethanol–Water Mixtures

In situ product recovery techniques aiming to obtain biotechnological products: A glance to current knowledge

Modelagem Da Remoção De Etanol E Água Por Arraste Com Co2: Efeito Da Temperatura Da Solução

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