title: Physicochemical interaction and its influence on deep bed filtration process.
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 microflocculation 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.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. jlguo15@hotmail.com
authors.forename: Jin-long
authors.initials: JL
authors.lastname: Guo
authors.forename: Jun
authors.initials: J
authors.lastname: Meng
authors.forename: Gui-ping
authors.initials: GP
authors.lastname: Li
authors.forename: Zhao-kun
authors.initials: ZK
authors.lastname: Luan
authors.forename: Hong-xiao
authors.initials: HX
authors.lastname: Tang
mesh_terms: D005374:Filtration; D005427:Flocculation; D008956:Models, Chemical; D010316:Particle Size; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*