Physicochemical interaction and its influence on deep bed filtration process

Article type: Research Article

Authors: GUO, Jin-long | MENG, Jun | LI, GUI-ping | LUAN, Zhao-kun | TANG, Hong-xiao

Affiliations: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Note: [] Corresponding author. E-mail:[email protected]

Abstract: The capillary model was used to analyze the hydraulic conditions in the deep bed filtration process. The physicochemical interaction forces between the filter media and suspended particles and their influence on deep bed filtration process were also studied theoretically. Through the comparison of the hydraulic and physicochemical forces, the key influencing factors on the filtration process were proposed and investigated. Pilot study of the micro-flocculation deep bed filtration was carried out in the No. 9 Potable Water Treatment Plant of Beijing, and the experimental results of hydraulic head loss, particle distribution and entrapment were presented. The theoretical prediction was reasonably consistent with the experimental results under different conditions, which indicated that the regulation and control of micro-flocculation and deep bed filtration could be realized by the evaluation of the physicochemical interactions. Further theoretical and experimental research should be carried out to investigate the interaction mechanism and its application in the deep bed filtration and other cases.

Keywords: capillary, micro-flocculation, filtration, physicochemical, interaction

Journal: Journal of Environmental Sciences, vol. 16, no. 2, pp. 297-301, 2004