Rapid ethanol fermentation in immobilized yeast cell reactor

Ghose, T. K.; Bandyopadhyay, K. K.

doi:10.1002/bit.260220713

Cited by 112 publications

(13 citation statements)

References 8 publications

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“…One of the most recent studies which illustrates the potential of such systems is that of Ghose and Bandyopadhyay (1980) who converted molasses to relatively high concentrations of ethanol using immobilized Saccharomyces cerevisiae.…”

Section: Introductionmentioning

confidence: 99%

Continuous ethanol production by immobilized cells of Zymomonas mobilis

Grote¹,

Lee²,

Rogers³

1980

Biotechnol Lett

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Section: Introductionmentioning

confidence: 99%

Continuous ethanol production by immobilized cells of Zymomonas mobilis

Grote¹,

Lee²,

Rogers³

1980

Biotechnol Lett

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“…Continuous fermentations of a 20% glucose feed medium with yeast cell recycle yielded an optimum ethanol productivity of 26.4 g/l/h a t a D of 0.30 h-l. An X of 30 g/l was maintained a t this p. GHOSE and BANDYOPADHYAY reported a strain of S. cerevisiae which had a ,urn,, of 0.275 h-1 in a molasses medium. It was able to successfully ferment the same medium a t a D of 0.6 h-l when immobilized on a pretreated inert support system [5]. A maximum ethanol productivity of 24.9 g/l/h was measured at this D.…”

Section: Introductionmentioning

confidence: 76%

“…X was not maximized by allowing the yeast cultures to grow batchwise for a period of time before beginning the flow of media through the chemostat. X was maximized in this manner by ROGERS and DEL ROSARIO [4] and by GHOSE and BANDYOPADHYAY [5]. These researchers also used higher substrate concentrations in the feed medium.…”

Section: Resulta and Discussionmentioning

confidence: 99%

Growth kinetics of top and bottom cultures of Saccharomyces spp. in a chemostat using sugarbeet molasses

Alexander

Zajic

Jones

1988

Acta Biotechnologica

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Growth kinetics were evaluated for three yeast strains of the genus Saccharomyces. Two topfloating strains, SF 115 and SF 116 and one flocculant yeast SF 104 were analyzed in pure and mixed cultures in 1-liter continuous fermentation experiments in a chemostat. Growth was monitored for 72 h at 30°C in a medium containing sugarbeet molasses and 1.0 g/liter each of NH4H,P0, and urea. SF 115 and SF 116 were found to have lowerpmax values of 0.290 and 0.296 h-l, respectively, than SF 104, which had a ,urnax of 0.364 h-l. The two top-floating yeasts (SF 115 and SF 116) demonstrated greater affinity for the substrate and utilized substrates a t a greater rate. They have K6 values of 4.03 x lW3 M and 3.798 x &I for SF 104.A mixed culture of SF 116 and SF 104 was found to have a pmax of 0.426 h-' with a K8 of 6.924 x 10-3 M. SF 115 grown in mixed culture with SF 104 exhibited a hmu of 0.473 h-l with a K, of 7.975 x 10-3 M. In both cases, the SF 104 was the dominant microbe in mixed culture systems.

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“…Equations (25)- (27), therefore, illustrate that the gel beads at the bottom of the column could have a higher cell loading than those at the top since the substrate concentration (So) decreases along the height of the column (for the upflow system). As a result, the productivity of the packed bed bioreactor could be further enhanced by using different cell loadings along the height of the column instead of a cell loading constant throughout the column.…”

Section: Resultsmentioning

confidence: 98%

Cell immobilization in κ‐carrageenan for ethanol production

Luong

1985

Biotech & Bioengineering

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A combination of extended Monod kinetics and the diffusional equation was used for evaluating the effectiveness factor of entrapped immobilized cells. Based on the kinetics of Zymomonas mobilis reported in the literature, the numerical results have revealed that the problem of mass transfer diffusional restrictions can be neglected by using small beads (1 mm in diameter) with a corresponding cell loading up to 276 g/L gel. On the basis of the numerical results obtained, the application of immobilized cells for continuous ethanol production was investigated. The kappa-carrageenan method was utilized to entrap Z. mobilis CP4, a potential ethanol producer. A two stage fermentation process has also been developed for ethanol production by the Z. mobilis carrageenan-bound cells. About 90 g/L ethanol was produced by immobilized cells at a total residence time of 1.56 h. The ethanol yield was estimated to be 93% of theoretical. The results obtained in this study also indicated that the control of optimum pH in an immobilized cell column is necessary to enhance the rate of ethanol production.

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Rapid ethanol fermentation in immobilized yeast cell reactor

Cited by 112 publications

References 8 publications

Continuous ethanol production by immobilized cells of Zymomonas mobilis

Continuous ethanol production by immobilized cells of Zymomonas mobilis

Growth kinetics of top and bottom cultures of Saccharomyces spp. in a chemostat using sugarbeet molasses

Cell immobilization in κ‐carrageenan for ethanol production

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