scholarly journals Optimization of Agitation and Aeration for Very High Gravity Ethanol Fermentation from Sweet Sorghum Juice by Saccharomyces cerevisiae Using an Orthogonal Array Design

Energies ◽  
2012 ◽  
Vol 5 (3) ◽  
pp. 561-576 ◽  
Author(s):  
Naulchan Khongsay ◽  
Lakkana Laopaiboon ◽  
Prasit Jaisil ◽  
Pattana Laopaiboon
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Orthogonal Array ◽  
Sweet Sorghum ◽  
High Gravity ◽  
Orthogonal Array Design ◽  
Array Design ◽  
Very High Gravity ◽  
Sweet Sorghum Juice ◽  
Agitation And Aeration ◽  
Very High

Improvement of butanol production from sweet sorghum juice by Clostridium beijerinckii using an orthogonal array design

2016 ◽  
Vol 79 ◽  
pp. 287-294 ◽  
Author(s):  
Likit Sirisantimethakom ◽  
Lakkana Laopaiboon ◽  
Patthranit Sanchanda ◽  
Jetnipit Chatleudmongkol ◽  
Pattana Laopaiboon
Keyword(s):  
Orthogonal Array ◽  
Sweet Sorghum ◽  
Clostridium Beijerinckii ◽  
Butanol Production ◽  
Orthogonal Array Design ◽  
Array Design ◽  
Sweet Sorghum Juice

scholarly journals Improvement of Bioethanol Production from Sweet Sorghum Juice under Very High Gravity Fermentation: Effect of Nitrogen, Osmoprotectant, and Aeration

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3620 ◽  
Author(s):  
Niphaphat Phukoetphim ◽  
Pachaya Chan-u-tit ◽  
Pattana Laopaiboon ◽  
Lakkana Laopaiboon
Keyword(s):  
Ethanol Production ◽  
Yeast Extract ◽  
Sweet Sorghum ◽  
Control Experiment ◽  
Nutrient Concentrations ◽  
High Gravity ◽  
Very High Gravity ◽  
Sweet Sorghum Juice ◽  
Very High Gravity Fermentation ◽  
Very High

To improve ethanol production fermentation efficiency from sweet sorghum juice under a very high gravity (VHG, 280 g/L of total sugar) condition by Saccharomyces cerevisiae NP01, dried spent yeast (DSY), yeast extract, and glycine concentrations were optimized using an L9 (34) orthogonal array design. The results showed that the order of influence on the ethanol concentration (PE) was yeast extract > glycine > DSY. The optimal nutrient concentrations for ethanol production were determined as follows: yeast extract, 3; DSY, 4; and glycine, 5 g/L. When a verification experiment under the projected optimal conditions was done, the P, ethanol yield (Yp/s), and ethanol productivity (Qp) values were 120.1 g/L, 0.47, and 2.50 g/L·h, respectively. These values were similar to those of the positive control experiment with yeast extract supplementation at 9 g/L. The yeast viability under the optimal condition was higher than that of the control experiment. To improve sugar utilization and ethanol production, aeration at 2.5 vvm for 4 h was applied under the optimal nutrient supplementation. The P, Yp/s, and Qp values were significantly increased to 134.3 g/L, 0.50, and 2.80 g/L·h, respectively.

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