Microalgae growth kinetic model based on the PSII quantum yield and its utilization in the operational curves construction

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Abstract

In this study, a microalgae growth kinetic model based on its PSII quantum yield was built. It was used to simulate the following operational curves: microalgae concentration - dilution rate (X-D) and volumetric cell productivity - dilution rate (Q-D) in a continuous culture. The model considers 8 parameters particular for the microalgae species and its condition and 2 operational parameters (irradiance and flat plate photo-bioreactor (FPB) light path). The model was tested in a Scenedesmus obliquus continuous culture in FPB at a constant irradiance of 300 μmol·m-2 s-1 and a dilution rate range of (0.16 to 2.7 d-1), with CO2-enriched air at 2%. The microalgae kinetic parameters were determined independently by means of simple methodologies, which were used to simulate the X-D and Qx-D operational curves. A very good correlation with the experimental results was found (correlation coefficient of 0.993 for the X-D curve). The optimal operating point to maximize the experimentally determined cell volumetric productivity was D = 0.84 d-1, while the model determined a value of D = 1 d-1.

Original languageEnglish
Pages (from-to)330-340
Number of pages11
JournalAlgal Research
Volume17
DOIs
StatePublished - 1 Jul 2016

Keywords

  • Continuous culture
  • Kinetic model
  • PSII quantum yield
  • Scenedesmus obliquus

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