Computer simulation of the coagulation of suspended solids - The applicability of the Mueller-Smoluchowski theory

• Published in: Journal of environmental sciences (China) 2016-06, Vol.44, p.197-203
• Main Authors: Wardzynska, Regina, Zaleska-Chrost, Beata
• Format: Article
• Language: English
• ISSN: 1001-0742
• DOI: 10.1016/j.jes.2015.10.029

The results of studies carried out using a computer programme simulating the coagulation of suspensions containing spherical sol particles and spherical coagulant particles are reported. The influence of the degree of dispersion of the system on the coagulation reaction kinetics was investigated. The obtained results of kinetic studies were tested in the light of classical Mueller-Smoluchowski equations. The influence of the physical properties of the coagulant, such as size, density and mass, on the coagulation rate was tested. It was found that within the range described in this paper, the rate of the simulated coagulation process fulfils both the kinetic equation of a first-order reaction, and the kinetic equation of a second-order reaction. Within the tested range, a significant influence of the mass and size of the coagulant on the coagulation rate was ascertained. The kinetic Mueller-Smoluchowski dependence is fulfilled in a broader range of the degree of dispersion, when the coagulant particle mass and the sol particle mass are equal. When the particle mass increases with an increase in the particle radius, the coagulation rate increases faster that it would result from the Mueller's dependence.