Direct fermentation of potato starch wastewater to lactic acid by Rhizopus oryzae and Rhizopus arrhizus

Huang, L. P., Jin, B. and Lant, P. (2005) Direct fermentation of potato starch wastewater to lactic acid by Rhizopus oryzae and Rhizopus arrhizus. Bioprocess and Biosystems Engineering, 27 4: 229-238. doi:10.1007/s00449-005-0398-0


Author Huang, L. P.
Jin, B.
Lant, P.
Title Direct fermentation of potato starch wastewater to lactic acid by Rhizopus oryzae and Rhizopus arrhizus
Journal name Bioprocess and Biosystems Engineering   Check publisher's open access policy
ISSN 1615-7591
1615-7605
Publication date 2005-07-01
Sub-type Article (original research)
DOI 10.1007/s00449-005-0398-0
Open Access Status Not yet assessed
Volume 27
Issue 4
Start page 229
End page 238
Total pages 10
Editor Matthias Reuss (Editor-in-Chief)
Place of publication Berlin / Heidelberg
Publisher Springer
Language eng
Subject C1
290600 Chemical Engineering
670799 Other
Abstract The biochemical kinetic of direct fermentation for lactic acid production by fungal species of Rhizopus arrhizus 3,6017 and Rhizopus oryzae 2,062 was studied with respect to growth pH, temperature and substrate. The direct fermentation was characterized by starch hydrolysis, accumulation of reducing sugar, and production of lactic acid and fungal biomass. Starch hydrolysis, reducing sugar accumulation, biomass formation and lactic acid production were affected with the variations in pH, temperature, and starch source and concentration. A growth condition with starch concentration approximately 20 g/l at pH 6.0 and 30 degrees C was favourable for both starch saccharification and lactic acid fermentation, resulting in lactic acid yield of 0.87-0.97 g/g starch associated with 1.5-2.0 g/l fungal biomass produced in 36 h fermentation. R. arrhizus 3,6017 had a higher capacity to produce lactic acid, while R. oryzae 2,062 produced more fungal biomass under similar conditions.
Keyword Fermentation
Lactic Acid
Reducing Sugar
Starch Hydrolysis
Fungal Biomass
Lactobacillus-amylophilus Gv6
Simultaneous Saccharification
L(+)-lactic Acid
Lactococcus-lactis
Wheat Bran
Ssf
Bioconversion
Optimization
Conversion
Selection
Biotechnology & Applied Microbiology
Engineering, Chemical
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 16:00:01 EST