Bioenergetics of growth and lipid production in Chlamydomonas reinhardtii

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

Research output: Contribution to journalArticle

12 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)503-510
Number of pages8
JournalEnergy
Volume83
DOIs
Publication statusPublished - Apr 1 2015

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Keywords

  • Chlamydomonas reinhardtii
  • Cumulative degree of perfection
  • Exergetic efficiency
  • Flagella work
  • Lipid production
  • Photosynthesis

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Küçük, K., Tevatia, R., Sorgüven, E., Demirel, Y., & Özilgen, M. (2015). Bioenergetics of growth and lipid production in Chlamydomonas reinhardtii. Energy, 83, 503-510. https://doi.org/10.1016/j.energy.2015.02.054