关键词: 分形理论, 絮凝形态学, 絮凝动力学, 混凝, 絮体

Abstract: Flocs formed during flocculation process have the characteristics of self-similarity and scale invariance, and are recognized as typical fractal objects. However, the conventional flocculation theories did not involve the effects of floc fractal structure. This paper, the advances in flocculation morphology and flocculation dynamics incorporating fractal theories were reviewed. The relations between floc fractal structure and floc size, strength, density and settling velocity, as well as the improvement in Smoluchowski equation and conventional floc growth model by incorporating fractal theories, were elaborated. In addition, it was pointed out that general conclusions in some respects haven’t be drawn in the case of fractal theory applications in flocculation process, and that especially the nonlinear flocculation kinetics still needs to be further developed.

Key words: fractal theory, flocculation morphology, flocculation kinetics, coagulation, flocs