Fig. 2

Comparison of shear rheology of algae slurries as a function of solids concentration and processing. The shear viscosity of slurries of harvested (a), incubated (b) and HPH-ruptured (c) Nannochloropsis sp. cells at 12% (circles), 20% (diamonds) and 24% (squares) solids concentration. Triplicate experiments from same batch of the slurry (n = 3) are shown for each set (overlapped data points indicate indistinguishable results). Herschel-Bulkley model (solids line) could only be fitted at low shear viscosities