Modelling of simultaneous effect of moisture and temperature on A. niger growth in solid-state fermentation

In the present work a two factorial design of experiments was applied to study the simultaneous effect of temperature and moisture on A. niger growth in the solid-state fermentation (SSF). The increase of water content to more than 55% at the temperatures 35 and 40 °C decreases microorganism growth....

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Bibliographic Details
Published in:Biochemical engineering journal 2004-11, Vol.21 (3), p.265-272
Main Authors: Hamidi-Esfahani, Z., Shojaosadati, S.A., Rinzema, A.
Format: Article
Language:English
Subjects:
Aspergillus niger
Biological and medical sciences
biomass estimation
Biotechnology
coniothyrium-minitans
cultivation
culture
Filamentous fungi
Fundamental and applied biological sciences. Psychology
Growth kinetic
heat-transfer
Modelling
Moisture
rhizopus-oligosporus
Solid-state fermentation
system
Temperature
transfer simulation
Triticum aestivum
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Summary:In the present work a two factorial design of experiments was applied to study the simultaneous effect of temperature and moisture on A. niger growth in the solid-state fermentation (SSF). The increase of water content to more than 55% at the temperatures 35 and 40 °C decreases microorganism growth. The logistic model was used to calculate growth kinetic parameters at different levels of temperature and moisture in solid-state fermentation. Ratkowsky equation was used to express the effect of temperature on specific growth rate. Quadratic polynomials express relationship between moisture content and growth parameters (maximum biomass and maximum specific growth rate) of A. niger inoculated on steamed wheat bran. The highest value of μ m and X m were 0.29 h −1 and 0.22 g biomass g DW −1 at 35 °C and 55%, respectively.
ISSN:1369-703X
1873-295X
DOI:10.1016/j.bej.2004.07.007