Kinetic characterization of Scenedesmus quadricauda under low irradiation conditions
| Autor: | Guilllermo Quijano, Germán Buitrón, Ivonne Figueroa-González |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
biology
Renewable Energy Sustainability and the Environment Chemistry 020209 energy General Chemical Engineering Organic Chemistry Irradiance Analytical chemistry Biomass chemistry.chemical_element 02 engineering and technology biology.organism_classification Kinetic energy Pollution Oxygen Inorganic Chemistry Light intensity Fuel Technology Mass transfer 0202 electrical engineering electronic engineering information engineering Irradiation Waste Management and Disposal Scenedesmus Biotechnology |
| Zdroj: | Journal of Chemical Technology & Biotechnology. 93:842-848 |
| ISSN: | 1097-4660 0268-2575 |
| DOI: | 10.1002/jctb.5438 |
| Popis: | BACKGROUND The kinetic parameters of a model culture of S. quadricauda were assessed under low light irradiation conditions. A simple and reliable method was developed for the kinetic characterization, which avoided CO2 mass transfer limitations and allowed for retrieving accurate kinetic data. Biomass and oxygen yields were also assessed. RESULTS A maximum specific CO2 uptake rate of 0.015 ± 0.002 gCO2 gVS−1 h−1 and half-saturation constant of 91 ± 13 gCO2 mLiq−3 were determined for S. quadricauda at a light intensity of 30 µmol m−2 s−1 at 25 °C. The biomass and oxygen yields ranged from 0.045–0.137 gVS gCO2−1 and 0.211–0.505 gO2 gCO2−1, respectively, both parameters being dependent on the initial CO2 concentration used. CONCLUSION A simple and reliable methodology for the kinetic characterization of microalgal cultures was developed and tested. We herein demonstrated that the maximum specific CO2 uptake rate of S. quadricauda at 30 µmol m−2 s−1 was higher than previous values reported for Scenedesmus cultures exposed to light intensities up to 4.5 times higher but limited by CO2 mass transfer. The methodology and results here obtained are useful towards determining whether is recommendable to implement a given microalgal-based process under low irradiance conditions or not. |
| Databáze: | OpenAIRE |
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