title: The impact of flow surges on rapid gravity filtration.
abstract: In drinking water treatment flow fluctuations or surges can occur at the filtration stage. Pilot plant tests were carried out to investigate the impact of flow surges on filter performance in this study. Moreover a filtration model was applied to analyse the impact of flow surges on filter performance and predict the experimental data obtained from pilot plant tests. Experimental results showed that flow surges caused an increase in effluent particle concentration and head loss. Theoretical analysis in this study showed that the impact of a flow surge became more significant as the filtration run approaches the particle breakthrough stage. The model was also used to fit the data from one water treatment plant. The comparison demonstrated a good agreement.
authors.affiliation: Department of Civil, Environmental & Geomatic Engineering, University College London, Gower Street, London WC1E6BT, UK. shan@merpro.com
authors.forename: Shejiao
authors.initials: S
authors.lastname: Han
authors.forename: Caroline S B
authors.initials: CS
authors.lastname: Fitzpatrick
authors.forename: Andrew
authors.initials: A
authors.lastname: Wetherill
mesh_terms: D003198:Computer Simulation; D005374:Filtration / Q000379:methods*; D006112:Gravitation; D008956:Models, Chemical; D010865:Pilot Projects; D014872:Water Movements; D018508:Water Purification