Evaluation of sugar cane hemicellulose hydrolyzate for cultivation of yeasts and filamentous fungi.
J Ind Microbiol Biotechnol
; 18(6): 360-3, 1997 Jun.
Article
in En
| MEDLINE
| ID: mdl-9248066
Sugar cane bagasse hemicellulosic fraction submitted to hydrolytic treatment with 100 mg of sulfuric acid per gram of dry mass, at 140 degrees C for 20 min, was employed as a substrate for microbial protein production. Among the 22 species of microorganisms evaluated, Candida tropicalis IZ 1824 showed TRS consumption rate of 89.8%, net cell mass of 11.8 g L-1 and yield coefficient (Yx/s) of 0.50 g g-1. The hydrolyzate supplemented with rice bran (20.0 g L-1), P2O5 (2.0 g L-1) and urea (2.0 g L-1) provided a TRS consumption rate of 86.3% and a cell mass of 8.4 g L-1. At pH 4.0 cellular metabolism was inhibited, whereas at pH 6.0 the highest yield was obtained. The presence of furfural (2.0 g L-1) hydroxymethylfurfural (0.08 g L-1) and acetic acid (3.7 g L-1) in the hydrolyzate did not interfere with cultivation at pH 6.0.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polysaccharides
/
Yeasts
/
Carbohydrate Metabolism
/
Fungi
Language:
En
Journal:
J Ind Microbiol Biotechnol
Journal subject:
BIOTECNOLOGIA
/
MICROBIOLOGIA
Year:
1997
Document type:
Article
Affiliation country:
Brazil
Country of publication:
Germany