TY - JOUR
T1 - Effective harvesting of the microalgae Chlorella protothecoides via bioflocculation with cationic starch.
AU - Letelier Gordo, Carlos Octavio
AU - Holdt, Susan Løvstad
AU - De Francisci, Davide
AU - Karakashev, Dimitar Borisov
AU - Angelidaki, Irini
PY - 2014
Y1 - 2014
N2 - In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40mgL-1) were screened against different algal densities (0.44, 0.56 and 0.77gL-1). Once the optimal flocculation concentration had been established (40mgL(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98% for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.
AB - In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40mgL-1) were screened against different algal densities (0.44, 0.56 and 0.77gL-1). Once the optimal flocculation concentration had been established (40mgL(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98% for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.
KW - Chlorella protothecoides
KW - Flocculation
KW - Cationic starch
U2 - 10.1016/j.biortech.2014.06.014
DO - 10.1016/j.biortech.2014.06.014
M3 - Journal article
C2 - 24983692
SN - 0960-8524
VL - 167
SP - 214
EP - 218
JO - Bioresource Technology
JF - Bioresource Technology
ER -