Continuous glycerol production in a packed-bed bioreactor with immobilized cells of Saccharomyces cerevisiae

1994 ◽  
Vol 49 (3) ◽  
pp. 209-212 ◽  
Author(s):  
G. González Benito ◽  
M. Ozores ◽  
M. Peña
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Immobilized Cells ◽  
Packed Bed ◽  
Glycerol Production ◽  
Packed Bed Bioreactor

Production of Ethanol as a Renewable Energy by Extractive Fermentation

2014 ◽  
Vol 493 ◽  
pp. 300-305 ◽  
Author(s):  
Tri Widjaja ◽  
Ali Altway ◽  
Ayu Ratna Permanasari ◽  
Setiyo Gunawan
Keyword(s):  
Immobilized Cells ◽  
Continuous Fermentation ◽  
Packed Bed ◽  
Extraction Process ◽  
Amyl Alcohol ◽  
Product Inhibition ◽  
Ethanol Productivity ◽  
Extractive Fermentation ◽  
Packed Bed Bioreactor ◽  
Recycle Ratio

One issue with batch fermentation is that product inhibition causes low yields and ethanol productivity. The objective of this study was to increase the yield and ethanol productivity via continuous fermentation in a packed bed bioreactor with both an integrated extraction process and recycling of the raffinate into the fermenter. Molasses was used as the feedstock, and the immobilized cells were supported by ĸ-carrageenan. This process used n-amyl alcohol, 1-octanol, and 1-dodecanol as solvents. The yield and ethanol productivity increased from 8.79% to 20.03% and 34.54 g/L·h to 118.16 g/L·h for experiments using n-amyl alcohol, 9.05% to 12.67% and 35.59 g/L·h to 74.71 g/L·h, for 1-dodecanol, 8.89% to 13.45% and 34.93 g/L·h to 84.62 g/L·h, for1-octanol by increasing recycle ratio from 0 to 0.5. Based on these results, n-amyl alcohol was the best solvent for the extractive fermentation process.

Optimization of a packed bed bioreactor with immobilized cells using experimental design

1993 ◽  
Vol 9 (5) ◽  
pp. 225-230
Author(s):  
M. Polakovič ◽  
V. Báleš ◽  
M. Dluhý ◽  
V. Štefuca
Keyword(s):  
Experimental Design ◽  
Immobilized Cells ◽  
Packed Bed ◽  
Packed Bed Bioreactor
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