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Bioenergetics of growth and lipid production in Chlamydomonas reinhardtii

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  • Küçük, Kübra
  • Tevatia, Rahul
  • Sorgüven, Esra
  • Demirel, Yaşar
  • Özilgen, Mustafa

Abstract

The study of thermodynamic aspects of the lipid, e.g., raw material for biodiesel, production in microalgae is important, as the non-lipid producing biological activities of the algal cultivation consume part of the solar energy captured during photosynthesis in expense of the exergetic efficiency of the lipid production process. The cultivation of Chlamydomonas reinhardtii (a unicellular biflagellate fresh-water microalga) is modeled as a three-step chemical mechanism representing growth, respiration, and lipid production. Further, the comprehensive thermodynamic analysis of these mechanisms is presented. The cumulative degree of perfection of the cellular proliferation, after excluding the lipid synthesis, fluctuates with no trend around 0.52 ± 0.19. The exergy analysis has indicated that C. reinhardtii prefers to maximize the lipid production when it is difficult to generate new cells. Under batch production of algal biomass, the highest heat and exergy loss per unit biomass production are accountable under the most favorable biological growth conditions, whereas the highest exergetic efficiency of the lipid production accounted under the least favorable growth conditions, which is in line with the previous studies.

Suggested Citation

  • Küçük, Kübra & Tevatia, Rahul & Sorgüven, Esra & Demirel, Yaşar & Özilgen, Mustafa, 2015. "Bioenergetics of growth and lipid production in Chlamydomonas reinhardtii," Energy, Elsevier, vol. 83(C), pages 503-510.
    • Handle: RePEc:eee:energy:v:83:y:2015:i:c:p:503-510
    DOI: 10.1016/j.energy.2015.02.054
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    3. Morsy, Fatthy Mohamed, 2015. "CO2-free biohydrogen production by mixed dark and photofermentation bacteria from sorghum starch using a modified simple purification and collection system," Energy, Elsevier, vol. 87(C), pages 594-604.

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