A novel media combination comprising of two layers of commercially available expanded clay (EC) media was tested for use in existing roughing filters (RF). Results have indicated a potentially suitable alternative to anthracite/sand, a dual media combination of a fine grade of high density EC media and a coarse grade of low density EC media. This novel dual media consistently achieved longer run lengths, whilst producing filtrate of adequate quality for slow sand filter influent – even when challenged with algal laden water.

This content is only available as a PDF.
You do not currently have access to this content.