TY - JOUR
T1 - Ratio between autoflocculating and target microalgae affects the energy-efficient harvesting by bio-flocculation
AU - Salim, S.
AU - Vermuë, M.H.
AU - Wijffels, R.H.
PY - 2012
Y1 - 2012
N2 - The effect of ratio between autoflocculating and target microalgae in bio-flocculation was studied with emphasis on the recovery, sedimentation rate and energy demand for harvesting the target microalgae. When the autoflocculating microalgae Ettlia texensis, Ankistrodesmus falcatus and Scenedesmus obliquus were added to Chlorella vulgaris at a ratio of 0.25, the recovery of C. vulgaris increased from 25% to, respectively, 40%, 36% and 31%. The sedimentation rate increased as well. Addition of Tetraselmis suecica to Neochloris oleoabundans at a ratio of 0.25 increased the recovery from 40% to 50%. Application of bio-flocculation at a ratio of 0.25, followed by centrifugation reduces the energy demand for harvesting of the target microalgae from 13.8 MJ kgDW_1 if only centrifugation is used to 1.83, 1.81, 1.53 and 1.34 MJ kgDW_1, respectively, using T. suecica, E. texensis, A. falcatus and S. obliquus and 3 h sedimentation before centrifugation
AB - The effect of ratio between autoflocculating and target microalgae in bio-flocculation was studied with emphasis on the recovery, sedimentation rate and energy demand for harvesting the target microalgae. When the autoflocculating microalgae Ettlia texensis, Ankistrodesmus falcatus and Scenedesmus obliquus were added to Chlorella vulgaris at a ratio of 0.25, the recovery of C. vulgaris increased from 25% to, respectively, 40%, 36% and 31%. The sedimentation rate increased as well. Addition of Tetraselmis suecica to Neochloris oleoabundans at a ratio of 0.25 increased the recovery from 40% to 50%. Application of bio-flocculation at a ratio of 0.25, followed by centrifugation reduces the energy demand for harvesting of the target microalgae from 13.8 MJ kgDW_1 if only centrifugation is used to 1.83, 1.81, 1.53 and 1.34 MJ kgDW_1, respectively, using T. suecica, E. texensis, A. falcatus and S. obliquus and 3 h sedimentation before centrifugation
KW - biofuels
KW - economics
U2 - 10.1016/j.biortech.2012.05.007
DO - 10.1016/j.biortech.2012.05.007
M3 - Article
SN - 0960-8524
VL - 118
SP - 49
EP - 55
JO - Bioresource Technology
JF - Bioresource Technology
ER -