scholarly journals Response surface optimization of D(-)-lactic acid production by Lactobacillus SMI8 using corn steep liquor and yeast autolysate as an alternative nitrogen source

2009 ◽  
Vol 8 (21) ◽  
pp. 5842-5846 ◽  
Author(s):  
J Bolner de Lima Cristian ◽  
Fontes Coelho Luciana ◽  
Cristina Blanco Kate ◽  
Contiero Jonas
Keyword(s):  
Lactic Acid ◽  
Nitrogen Source ◽  
Response Surface ◽  
Acid Production ◽  
Corn Steep Liquor ◽  
Lactic Acid Production ◽  
Response Surface Optimization ◽  
Yeast Autolysate ◽  
Surface Optimization ◽  
Steep Liquor

Organic Acid Production by Propionibacterium shermanii: Effect of pH, Temperature and Vitamin-Nitrogen Source

1997 ◽  
Vol 52 (3-4) ◽  
pp. 193-196 ◽  
Author(s):  
A. Quesada-Chanto ◽  
A . G. Schroeder ◽  
A. C. Schmid-Meyer ◽  
J. A. López ◽  
M. M. Silveira ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Propionic Acid ◽  
Yeast Extract ◽  
Acid Production ◽  
Ph Value ◽  
Corn Steep Liquor ◽  
Organic Acid Production ◽  
Propionibacterium Shermanii ◽  
Difco Yeast Extract ◽  
Steep Liquor

Abstract Production of propionic acid by Propionibacterium shermanii CDB 10014 was enhanced by a pH value of 6.5 and by temperatures in the range 35-37 °C. Depending on the type of yeast extract, succinic acid can be produced in higher proportions, with decreasing propionic acid yields. With respect to propionic acid production, Difco yeast extract has shown the best results when yeast extract preparations from other different suppliers were compared. To replace yeast extract by a cheaper vitamin-nitrogen source, corn-steep liquor was tested. A complete depletion of glucose was achieved, yielding a final propionic acid concentration of over 35 g/l. These results are even better than those obtained with Difco yeast extract and suggest the possibility of an economical process based on corn-steep liquor.

Highly efficient l-lactic acid production from xylose in cell recycle continuous fermentation using Enterococcus mundtii QU 25

RSC Advances ◽  
2016 ◽  
Vol 6 (21) ◽  
pp. 17659-17668 ◽  
Author(s):  
Mohamed Ali Abdel-Rahman ◽  
Yukihiro Tashiro ◽  
Takeshi Zendo ◽  
Kenji Sakai ◽  
Kenji Sonomoto
Keyword(s):  
Lactic Acid ◽  
Continuous Fermentation ◽  
Corn Steep Liquor ◽  
Lactic Acid Production ◽  
High Concentration ◽  
Cell Recycle ◽  
Enterococcus Mundtii ◽  
Cell Recycling ◽  
Steep Liquor ◽  
Feeding Medium

We report an effective cell recycling continuous fermentation of xylose to l-lactic acid with high concentration, productivity, and yield using strain QU 25. pH was found to affect the yield and corn steep liquor as feeding medium enhanced the yield.

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