Mild disintegration of the green microalgae Chlorella vulgaris using bead milling

P.R. Postma*, T.L. Miron, G. Olivieri, M.J. Barbosa, R.H. Wijffels, M.H.M. Eppink

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

146 Citations (Scopus)

Abstract

In this work, the mild disintegration of the microalgae Chlorella vulgaris for the release of intracellular products has been studied. By means of bead milling the microalgae suspensions were successfully disintegrated at different biomass concentrations (25–145 gDW kg-1) over a range of agitator speeds (6–12 m s-1). In all cases over 97% of cell disintegration was achieved resulting in a release of water soluble proteins. A clear optimum rate of disintegration and protein release was observed at an agitator speed of 9–10 m s-1 regardless of the biomass concentration. Selective extraction of water soluble proteins was observed as proteins released sooner than cell disintegration took place. Proteins could be released at 85% lower energy input than for cell disintegration resulting in specific energy consumptions well below 2.5 kWh kgDW-1.
Original languageEnglish
Pages (from-to)297-304
JournalBioresource Technology
Volume184
DOIs
Publication statusPublished - 2015

Keywords

  • protein aggregation
  • cell disruption
  • microbial-cells
  • release
  • food
  • biomass
  • purification
  • extraction
  • economics
  • products

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