Pérez, Alan

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Pérez
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Alan
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Alan Pérez

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2018 - 20192
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Autor:in: Van der Bruggen, Bart × Institut: Institut für Chemie und Bioanalytik ×

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  • Vorschaubild nicht verfügbar
    Publikation
    Modeling of a liquid membrane in Taylor flow integrated with lactic acid fermentation
    (Elsevier, 10/2019) Pérez, Alan; Van der Bruggen, Bart; Fontalvo, Javier [in: Chemical Engineering and Processing: Process Intensification]
    The application of a liquid membrane in Taylor flow (LMTF) is a promising method that can be integrated with other separation or reactive processes in view of process intensification. In this work, a model for a hybrid LMTF – fermentation system was developed for lactic acid production using batch fermentation and LMTF experimental data. The hybrid model is compared to experimental data of the hybrid system. Through a sensitivity analysis of the main variables of the LMTF an optimum value of the overall volumetric mass transfer coefficient (0.0122 1/s) was achieved for lactic acid removal. This was further used for modeling the hybrid system. The fermentation time of the hybrid system is reduced by 7 h, the productivity and biomass concentration is increased by 2.578 g/(L·h) and 2.7016 g/L, respectively, as compared with a batch fermentation. In addition, the effect of the number of channels of the LMTF is modeled and its impact on productivity, fermentation time, and final biomass concentration is analyzed. It was concluded that lactic acid removal through the LMTF from the fermentation broth is an alternative to control the pH within fermenter.
    01A - Beitrag in wissenschaftlicher Zeitschrift
  • Vorschaubild nicht verfügbar
    Publikation
    Study of overall mass transfer coefficients in a liquid membrane in Taylor flow regime: Calculation and correlation
    (Elsevier, 12/2018) Pérez, Alan; Van der Bruggen, Bart; Fontalvo, Javier [in: Chemical Engineering and Processing: Process Intensification]
    The use of a liquid membrane in Taylor flow regime is a recent technology, which extends and generalizes the definition of a membrane. It has been developed and tested for lactic acid removal. A challenge in understanding the technology is that the values of the overall volumetric mass transfer coefficients are not known, and it is unclear how they are related with the operational conditions. In this work, the overall volumetric mass transfer for the liquid membrane in Taylor flow was calculated from experimental results and three empirical models, two of which are from literature and one was developed in this work based on dimensional analysis. From combination of experimental results and the developed models the main variables (operational conditions) of the liquid membrane in Taylor flow that have a strong influence on the overall volumetric mass transfer coefficients (in the donor and in the membrane phase) were defined. The relative velocity results as the variable that has the largest influence on the performance of this new liquid membrane technology.
    01A - Beitrag in wissenschaftlicher Zeitschrift