TY - JOUR
T1 - Compound bioflocculant and polyaluminum chloride in kaolin-humic acid coagulation
T2 - Factors influencing coagulation performance and floc characteristics
AU - Li, Ruihua
AU - Gao, Baoyu
AU - Huang, Xin
AU - Dong, Hongyu
AU - Li, Xiaochen
AU - Yue, Qinyan
AU - Wang, Yan
AU - Li, Qian
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2014/9/8
Y1 - 2014/9/8
N2 - The objective of this study was to investigate the influence of coagulant dosage and pH on coagulation performance and floc properties using polyaluminum chloride (PAC) and compound bioflocculant (CBF) dual-coagulant in kaolin-humic acid (HA) treatment. Results showed that as PAC dosage rose, comparatively better coagulation efficiencies and floc characteristics were achieved due to stronger charge neutralization and sweeping effect. Addition of CBF could enhance coagulation performance and floc properties, including size, strength and recoverability, except fractal dimension. Solution pH had a significant effect on coagulation efficiencies and flocs formation. Under acidic condition, flocs showed higher strength and recoverability but lower fractal dimension, where charge neutralization was the foremost mechanism. More compact flocs were generated under alkaline condition due to the sweeping effect of hydrolyzed Al species.
AB - The objective of this study was to investigate the influence of coagulant dosage and pH on coagulation performance and floc properties using polyaluminum chloride (PAC) and compound bioflocculant (CBF) dual-coagulant in kaolin-humic acid (HA) treatment. Results showed that as PAC dosage rose, comparatively better coagulation efficiencies and floc characteristics were achieved due to stronger charge neutralization and sweeping effect. Addition of CBF could enhance coagulation performance and floc properties, including size, strength and recoverability, except fractal dimension. Solution pH had a significant effect on coagulation efficiencies and flocs formation. Under acidic condition, flocs showed higher strength and recoverability but lower fractal dimension, where charge neutralization was the foremost mechanism. More compact flocs were generated under alkaline condition due to the sweeping effect of hydrolyzed Al species.
KW - Coagulation performance
KW - Compound bioflocculant
KW - Fractal dimension
KW - PH
UR - https://www.scopus.com/pages/publications/84907522580
U2 - 10.1016/j.biortech.2014.08.126
DO - 10.1016/j.biortech.2014.08.126
M3 - 文章
C2 - 25218625
AN - SCOPUS:84907522580
SN - 0960-8524
VL - 172
SP - 8
EP - 15
JO - Bioresource Technology
JF - Bioresource Technology
ER -
