Modelling and optimization of wet microalgae Scenedesmus quadricauda lipid extraction using microwave pre-treatment method and response surface methodology

C. Onumaegbu, A. Alaswad, C. Rodriguez, A. Olabi

Research output: Contribution to journalArticle

Abstract

The process of extracting lipids from high-moisture Scenedesmus quadricauda microalgae biomass disrupted with microwave was examined. The study showed that microwave pre-treatment is effective in algae cell rupture while microwave power was found to be a significant factor to enhance the degree of cell disruption. Though microwave pre-treatment time had some effect, the degree of cell rupture seemed to decrease after a certain pre-treatment time. The total lipid from Scenedesmus quadricauda sp. were extracted using a mixture methanol and sulphuric acid as an organic solvent. In addition, it was discovered that microwave pre-treatment enhances the disruption of microalgae cells to attain a high level of lipid yields. Optimal lipid yield obtained in this study was 49% at power 600 W, heating time of 8 min and extraction time of 3.5 h.

Original languageEnglish
Pages (from-to)1323-1331
Number of pages9
JournalRenewable energy
Volume132
Early online date20 Sep 2018
DOIs
Publication statusPublished - 1 Mar 2019

Keywords

  • Biodiesel
  • Lipid extraction
  • Microalgae
  • Microwave pre-treatment
  • Modelling
  • Optimization

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