ISSN:
1573-0972
Keywords:
Oxygen
;
Propionibacterium
;
propionic acid
;
vitamin B12.
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract Propionibacterium shermanii CDB 10015 was able to grow at different volumetric oxygen transfer coefficients (KLa) of 10, 22, 53h−1. These results demonstrate that this bacterium, known as anaerobic, is able to grow well under aerobic conditions. The cell biomass increased from 7.9 in anaerobic conditions to 18.3g/l at KLa 53h−1, increasing also the cell yield from 0.3 to 0.7g/g. The organic acid production pattern also changed with aeration. The acetic: propionic acid ratio increased from 0.38 in anaerobiosis to 6.25 at KLa 53h−1. The vitamin B12 production decreased from 3.1mg/l in anaerobiosis to 0.5mg/l at KLa 53h−1.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008868907251
Permalink