. Alum flocculated Cyclorella has a
lower density of 1,001 kg m_3 than Cyclotella cells
and the fioc particle diameter would need to be
210 um for settlement at 20 °C (Edzwald 1993). Alum
flocs typically range in diameter from 30 to 400 um
(Hendricks 2010). but low density algal flocs can be
difficult to separate by sedimentation (Edzwald 1993)