Microalgal cultures from multiple bioreactors ($1200 L with a
concentration of 0.7 g dried microalgae/L) were harvested at the
same time and dewatered using a Westfalia disk stack centrifuge.
The concentrate (10 L with a concentration of $80 g dried microal-
gae/L) was thoroughly mixed to average out any potential discrep-
ancies in lipid content between cultures harvested from the
different bioreactors.
A portion of the concentrate (2.5 L) was dewatered further
using a bench top centrifuge (Heraeus Multifuge 3 S-R, Kendro,
Germany) at 4500 rpm for 10 min. The centrate was discarded
and the resulting microalgal paste ($0.67 L with a concentration
of 300 g dried microalgae/L) was rinsed once with deionised water
to remove residual salts. The microalgal paste provided all the
biomass needed for the study ($200 g of dried microalgae)