October 2-8, 2004
On the basis of summarizing and analyzing the theory of coagu-flocculation and its practical application, this paper proposes a physical model for coagu-flocculation. The model defines the process of coagu-flocculation as three steps: mixing, coagulation and flocculation, though there is no strict distinction in the practical processes themselves. Through experiment, two facts are verified: (1) with organic flocculants mixing and flocculation occur substantially in the same step, and need strong mixing intensity; while with inorganic flocculants much weaker mixing intensity is needed; (2) so as to ensure big floccules are formed, weaker mixing for a certain period of time is required.
Zhan Hanhui, Zhang Xiaoqi, and Zhan Xuehui, "Coagu-Flocculation Mechanism of Flocculant and its Physical Model" in "Separations Technology VI: New Perspectives on Very Large-Scale Operations", Chris Fell, University of New South Wales, Australia, George E. Keller II, MATRIC, USA Eds, ECI Symposium Series, (2004). http://dc.engconfintl.org/separations_technology_vi/8