Abstract
This work reports experimental data, kinetic modeling, and simulations of enzyme-catalyzed hydrolysis of olive oil. This reaction was performed in batch system and an ordered-sequential Bi Bi model was used to model the kinetic mechanism. A fed-batch system was proposed and experimental data were obtained and compared to the simulated values. The kinetic model used was able to correlate the experimental data, in which a satisfactory agreement between the experimental data and modeling results was obtained under different enzyme concentration and initial free water content. Therefore, the modeling allowed a better understanding of the reaction kinetics and affords a fed-batch simulation for this system. From the results obtained, it was observed that the fed-batch approach showed to be more advantageous when compared to the conventional batch system.
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Abbreviations
- DAG:
-
Diacylglycerol
- FFA:
-
Free fatty acid
- G:
-
Glycerol
- H2O:
-
Water in the oil phase
- H2Oins :
-
Water not solubilized in the oil
- K r (r = 1,…,7):
-
Apparent rate constants (g-substrate2/mmol2)
- MAG:
-
Monoacylglycerol
- NOBS:
-
Number of observations
- M FFA :
-
Molar mass of the free fatty acid of olive oil (g/mol)
- M DAG :
-
Molar mass of the diacylglycerol of olive oil (g/mol)
- M MAG :
-
Molar mass of the monoacylglycerol of olive oil (g/mol)
- M TAG :
-
Molar mass of the triacylglycerol of olive oil (g/mol)
- rmsd:
-
Root-mean-square deviation
- TAG:
-
Triacylglycerol
- U r (r = 1,…,6):
-
Apparent rate constants (g-substrate/(h mmol))
- [x oilsurf ]:
-
Molar fraction of surfactants in the oil
- [w expio ]:
-
Experimental mass fraction of pseudo-component i in the observation o
- [w calcio ]:
-
Calculated mass fraction of pseudo-component i in the observation o
- [DAG]:
-
Diacylglycerol concentration (mmol/g-substrate)
- [FFA]:
-
Free fatty acids concentration (mmol/g-substrate)
- [H2O]:
-
Water concentration in the oil phase (mmol/g-substrate)
- [H2O]0 :
-
Initial water concentration in the oil phase (mmol/g-substrate)
- [H2Oins]:
-
Concentration of water not solubilized in the oil phase (mmol/g-substrate)
- [G]:
-
Glycerol concentration (mmol/g-substrate)
- [MAG]:
-
Monoacylglycerol concentration (mmol/g-substrate)
- [TAG]:
-
Triacylglycerol concentration (mmol/g-substrate)
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Acknowledgments
The authors thank the CNPq, PRH24/ANP, CAPES, and Fundação Araucária (Brazilian Agencies) for financial support and scholarships.
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Cabral, P.S., Filho, A.Z., Voll, F.A.P. et al. Kinetics of Enzymatic Hydrolysis of Olive Oil in Batch and Fed-batch Systems. Appl Biochem Biotechnol 173, 1336–1348 (2014). https://doi.org/10.1007/s12010-014-0943-x
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DOI: https://doi.org/10.1007/s12010-014-0943-x