Production of gluconic acid by Aspergillus niger immobilized on polyurethane foam

1993 ◽  
Vol 39 (3) ◽  
Author(s):  
NikolayB. Vassilev ◽  
MariaCh. Vassileva ◽  
DimitrinkaI. Spassova
Keyword(s):  
Aspergillus Niger ◽  
Polyurethane Foam ◽  
Gluconic Acid

Influence of biomass on hydrodynamics of an internal loop airlift reactor

2006 ◽  
Vol 60 (6) ◽  
Author(s):  
M. Juraščík ◽  
M. Hucík ◽  
I. Sikula ◽  
J. Annus ◽  
J. Markoš
Keyword(s):  
Aspergillus Niger ◽  
Gluconic Acid ◽  
Solid Phase ◽  
Biomass Concentration ◽  
Airlift Reactor ◽  
Phase System ◽  
Two Phase ◽  
Experimental Conditions ◽  
Internal Loop ◽  
Three Phase

AbstractThe effect of the biomass presence on the overall circulation velocity, the linear velocities both in the riser and the downcomer and the overall gas hold-up was studied in a three-phase internal loop airlift reactor (ILALR). The measured data were compared with those obtained using a two-phase system (air—water). All experiments were carried out in a 40 dm3 ILALR at six different biomass concentrations (ranging from 0 g dm−3 to 7.5 g dm−3), at a temperature of 30°C, under atmospheric pressure. Air and water were used as the gas and liquid model media, respectively. Pellets of Aspergillus niger produced during the fermentation of glucose to gluconic acid in the ILALR were considered solid phase. In addition, liquid velocities were measured during the fermentation of glucose to gluconic acid using Aspergillus niger. All measurements were performed in a bubble circulation regime. At given experimental conditions the effect of the biomass on the circulation velocities in the ILALR was negligible. However, increasing of the biomass concentration led to lower values of the total gas hold-up.

Gluconic acid production at high concentrations by Aspergillus niger immobilized on a nonwoven fabric

1989 ◽  
Vol 67 (6) ◽  
pp. 404-408 ◽  
Author(s):  
Hiroshi Sakurai ◽  
Hang Woo Lee ◽  
Seigo Sato ◽  
Sukekuni Mukataka ◽  
Joji Takahashi
Keyword(s):  
Aspergillus Niger ◽  
Gluconic Acid ◽  
Acid Production ◽  
Nonwoven Fabric ◽  
High Concentrations ◽  
Gluconic Acid Production

Corrections

1973 ◽  
Vol 19 (9) ◽  
pp. 1084-1084
Keyword(s):  
Aspergillus Niger ◽  
Horseradish Peroxidase ◽  
Glucose Oxidase ◽  
Gluconic Acid ◽  
Type Ii ◽  
Sigma Chemical

Abstract p 1424, Table 2, "units/liter" should read "milliunits/ liter." In reference to the article by Meites, S., and Saniel-Banrey, K., Clin. Chem. 19, 308 (1973), the authors wish to make the following clarification: The glucose oxidase used was purified from Aspergillus niger, and obtained from Sigma Chemical Co., St. Louis, Mo. 63178. It contained 1.5 EU/mg. One unit (EU) will oxidize 1 µmol of glucose to gluconic acid and H2O2 per minute at pH 5.1 at 35 °C. The peroxidase used was horseradish peroxidase and was obtained from Sigma Chemical Co. as Type II (RZ 1.0-1.5), approximately 100-150 Purpurogallin (20-s) Units/mg, or as Worthington "Peroxidase D," 626 U/mg (RZ > 1), Worthington Biochemical Corp., Freehold, N.J. 07728.

Biotransformation of glucose to gluconic acid by Aspergillus niger—study of mass transfer in an airlift bioreactor

2002 ◽  
Vol 10 (3) ◽  
pp. 197-205 ◽  
Author(s):  
Jaroslav Klein ◽  
Michal Rosenberg ◽  
Jozef Markoš ◽  
Ondrej Dolgoš ◽  
Marek Krošlák ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Aspergillus Niger ◽  
Gluconic Acid ◽  
Airlift Bioreactor

Evaluation of enzymatic activity of commercial inulinase from Aspergillus niger immobilized in polyurethane foam

2013 ◽  
Vol 91 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Marceli Fernandes Silva ◽  
Diane Rigo ◽  
Vinícius Mossi ◽  
Rogério Marcos Dallago ◽  
Pedro Henrick ◽  
...  
Keyword(s):  
Aspergillus Niger ◽  
Enzymatic Activity ◽  
Polyurethane Foam
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