4.8 Review

Cell disruption and lipid extraction from Chlorella species for biorefinery applications: Recent advances

Journal

BIORESOURCE TECHNOLOGY
Volume 366, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128183

Keywords

Chlorella; Lipids; Extraction; Cell disruption; Algal biorefinery

Funding

  1. Research and Development Program of the Korea Institute of Energy Research
  2. National Research Foundation of Korea (NRF) - Ministry of Science and ICT, Republic of Korea
  3. [KIERC1-2432]
  4. [NRF- 2019R1A2C100346313]

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This review discusses the current achievements in cell disruption and lipid extraction methods for Chlorella species in the past five years, covering various chemical, physical, and biological approaches and comparing their advantages, limitations, and applicability. Despite future challenges in developing environmentally friendly and efficient extraction technologies, there are promising prospects for practical applications in sustainable Chlorella biorefineries.
Chlorella is a promising microalga for CO2-neutral biorefinery that co-produces drop-in biofuels and multiple biochemicals. Cell disruption and selective lipid extraction steps are major technical bottlenecks in biorefinement because of the inherent robustness and complexity of algal cell walls. This review focuses on the state-of-the-art achievements in cell disruption and lipid extraction methods for Chlorella species within the last five years. Various chemical, physical, and biological approaches have been detailed theoretically, compared, and discussed in terms of the degree of cell wall disruption, lipid extractability, chemical toxicity, cost-effectiveness, energy use, scalability, customer preferences, environment friendliness, and synergistic combinations of different methods. Future challenges and prospects of environmental-friendly and efficient extraction technologies are also outlined for practical applications in sustainable Chlorella biorefineries. Given the diverse industrial applications of Chlorella, this review may provide useful information for downstream processing of the advanced biorefineries of other algae genera.

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