Ethanol fermentation using immobilized cells in a multistage fluidized bed bioreactor

Tzeng, Jing-Yu; Fan, Liang‐Shih; Gan, Yu; Hu, Ting

doi:10.1002/bit.260381019

Cited by 38 publications

(8 citation statements)

References 26 publications

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“…This technique enhances the productivity and ethanol yield and reduces the inhibitory effect of high substrate concentration and product [82–84]. In addition, immobilization prevents cell washout in continuous fermentation that avoids separation or recycle of cells in the process [85]. Several carriers have been reported for cell immobilization including apple pieces [83], k-carrageenan gel, polyacrylamide, g-alumina [86], chrysotile [87], calcium-alginate [88, 89], sugarcane pieces [56], banana leaf sheath [90], and orange peel [91].…”

Section: Fermentation Of Juicesmentioning

confidence: 99%

Bioethanol Production from Fermentable Sugar Juice

Zabed

Faruq

Sahu

et al. 2014

The Scientific World Journal

223

140

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Bioethanol production from renewable sources to be used in transportation is now an increasing demand worldwide due to continuous depletion of fossil fuels, economic and political crises, and growing concern on environmental safety. Mainly, three types of raw materials, that is, sugar juice, starchy crops, and lignocellulosic materials, are being used for this purpose. This paper will investigate ethanol production from free sugar containing juices obtained from some energy crops such as sugarcane, sugar beet, and sweet sorghum that are the most attractive choice because of their cost-effectiveness and feasibility to use. Three types of fermentation process (batch, fed-batch, and continuous) are employed in ethanol production from these sugar juices. The most common microorganism used in fermentation from its history is the yeast, especially, Saccharomyces cerevisiae, though the bacterial species Zymomonas mobilis is also potentially used nowadays for this purpose. A number of factors related to the fermentation greatly influences the process and their optimization is the key point for efficient ethanol production from these feedstocks.

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Section: Fermentation Of Juicesmentioning

confidence: 99%

Bioethanol Production from Fermentable Sugar Juice

Zabed

Faruq

Sahu

et al. 2014

The Scientific World Journal

223

140

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“…Good interphase mass transfer is possible with sufficient gas release to avoid channeling (Tzeng et al, 1991). Ethanol conversion in an 8-stage bioreactor with alginate immobilized S. curlsbergensis was simulated, taking into account complete mixing flow behavior at each stage, free-cell kinetics, liquid-solid mass transfer and intraparticulate diffusion (Tzeng et al, 1991). Good agreement was obtained between experimental and predicted results, except for the later stages when high flow rate was used, resulting in high hold-up and liquid-solid mass transfer limitation.…”

Section: Fluidized Bed Reactor (Fbr)mentioning

confidence: 99%

“…Each stage is separated by a mesh sieve plate and the solid and liquid phases are well mixed. Good interphase mass transfer is possible with sufficient gas release to avoid channeling (Tzeng et al, 1991). Ethanol conversion in an 8-stage bioreactor with alginate immobilized S. curlsbergensis was simulated, taking into account complete mixing flow behavior at each stage, free-cell kinetics, liquid-solid mass transfer and intraparticulate diffusion (Tzeng et al, 1991).…”

Section: Fluidized Bed Reactor (Fbr)mentioning

confidence: 99%

Immobilization of Cells for Application in the Food Industry

Groboillot

Boadi

Poncelet

et al. 1994

Critical Reviews in Biotechnology

161

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Immobilization of cells offers advantages to the food process industries, including enhanced fermentation productivity and cell stability and reduced downstream processing costs due to facilitated cell recovery and recycle. This article summarizes the varied immobilization methodologies, including adsorption, entrapment, covalent binding, and microencapsulation. Examples of interest to the food industry are provided, together with a review of the physiological effects of immobilization. Topics in process engineering include immobilized cell bioreactor configurations and the scale-up potential of the various immobilization techniques.

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“…To avoid this problem, cell immobilization is introduced in the repeated-batch process. The immobilized cell system offers several advantages over the free cell fermentation operations, i.e., higher yeast cell concentration, intimate phase mixing, high fermentation rate, recycling utilization of the yeast and lower product inhibition (Tzeng and Fan 1991;Santos et al 2008). Therefore, this system has been traditionally considered as an alternative to increase the process productivity and minimize the production cost (Santos et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Ethanol production from sweet sorghum juice in repeated-batch fermentation by Saccharomyces cerevisiae immobilized on corncob

Laopaiboon

2011

World J Microbiol Biotechnol

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Ethanol fermentation from sweet sorghum juice containing 240 g/l of total sugar by Saccharomyces cerevisiae TISTR 5048 and S. cerevisiae NP 01 immobilized on low-cost support materials, corncob pieces, was investigated. In batch fermentation, S. cerevisiae TISTR 5048 immobilized on 6 × 6 × 6 mm(3) corncobs gave higher ethanol production than those immobilized on 12 × 12 × 12 mm(3) corncobs in terms of ethanol concentration (P), yield (Y ( p/s )) and productivity (Q ( p )) with the values of 102.39 ± 1.11 g/l, 0.48 ± 0.01 and 2.13 ± 0.02 g/l h, respectively. In repeated-batch fermentation, the yeasts immobilized on the 6 × 6 × 6 mm(3) corncobs could be used at least eight successive cycles with the average P, Y ( p/s ) and Q ( p ) of 97.19 ± 5.02 g/l, 0.48 ± 0.02 and 2.02 ± 0.11 g/l h, respectively. Under the same immobilization and repeated-batch fermentation conditions, P (90.75 ± 3.05 g/l) and Q ( p ) (1.89 ± 0.06 g/l h) obtained from S. cerevisiae NP 01 were significantly lower than those from S. cerevisiae TISTR 5048 (P< 0.05), while Y ( p/s ) from both strains were not different. S. cerevisiae TISTR 5048 immobilized on the corncobs also gave significantly higher P, Y ( p/s ) and Q ( p ) than those immobilized on calcium alginate beads (P < 0.05).

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Ethanol fermentation using immobilized cells in a multistage fluidized bed bioreactor

Cited by 38 publications

References 26 publications

Bioethanol Production from Fermentable Sugar Juice

Bioethanol Production from Fermentable Sugar Juice

Immobilization of Cells for Application in the Food Industry

Ethanol production from sweet sorghum juice in repeated-batch fermentation by Saccharomyces cerevisiae immobilized on corncob

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