PRODUCTION OF L(+)-LACTIC ACID USING IMMOBILIZED RHIZOPUS-ORYZAE - REACTOR PERFORMANCE-BASED ON KINETIC-MODEL AND SIMULATION

Date

1994-02-01

Author

Hamamcı, Haluk

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The production of L(+)-lactic acid using alginate immobilized Rhizopus oryzae in tapered-column fluidized-bed batch reactor was tested and simulated using the kinetic data taken independently in shake-flask cultures. The data show saturation kinetics with substrate and product inhibitions in linear form. Analysis of the kinetic data gave kinetic constants: V-m, 11.04 g lactic acid/(L-bead. h); K-m, 20.9 g glucose/L; and K-i, 365 g glucose/L for lactic acid production. The product inhibition constant, K-p, was found to be 316 g lactic acid/L. The simulation results showed a good agreement with the experimental results when the initial lag phase was taken into account in the simulation model. Without the adjustment for the initial lag period, the kinetic model showed higher conversion. Starting with a glucose concentration of 150 g/L, it was possible to produce 73 g/L of L(+)-lactic acid in 44.5 h. The lactic acid yield was 64.8% by weight based on the amount of glucose consumed.

Subject Keywords

L(+)-Lactic acid, Rhizopus oryzae, Tapered-column, Fluidized-bed reactor, Immobilized mycelia, Bioreactor performance, Fermentation kinetics, Bioprocess simulation

URI

https://hdl.handle.net/11511/32459

Journal

APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY

DOI

https://doi.org/10.1007/bf02921650

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

H. Hamamcı, “PRODUCTION OF L(+)-LACTIC ACID USING IMMOBILIZED RHIZOPUS-ORYZAE - REACTOR PERFORMANCE-BASED ON KINETIC-MODEL AND SIMULATION,” APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY, pp. 125–133, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32459.