Enhanced treatment of CSO with vertical flow sand filters

M. Uhl, M. Janiczek, S. Grobe & W. Merkel
Experimental studies of vertical flow sand filters for CSO treatment were conducted in lab and semi scale to investigate the dependency of processes and treatment efficiencies on filter material characteristics and operational boundary conditions. It was found out that sands with grain sizes of 0/2 mm and carbonate additives offer the best material conditions for high elimination rates. Artificial throttling of the outflow to constant 0.01 l s-1m-2 proved to be essential for high treatment...
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