This article, using a laboratory-based approach, aims to study the effect of different filter bed design variables on the clogging phenomenon and its inter-relationship with treatment performance. Filter bed design parameters studied include: filter media particle sizes (0.5mm, 2mm, 5mm), depth of the filter bed (100mm, 300mm and 500mm), and filter media packing configurations. To study the effect of packing, configurations were constructed with a single layer of a specific filter media size, two and three layers of different particle sizes, and mixed filter bed with particles of different sizes. It was found that parameters, such as size of filter grains and depth of filter bed, affected the overall performance of filter beds considerably (initial infiltration rate, volume of stormwater treated before clogging and overall treatment performance). Layering of particles also improved the performance of different filter bed designs but three layered system behaved in same way as a two-layered system. Experimentation with these variables will assist in development of a modelling tool to predict clogging of filter media with high infiltration rates used for stormwater treatment.
WSUD 2012 - 7th International Conference on Water Sensitive Urban Design: Building the Water Sensitive Community, Final Program and Abstract Book