Soil filters for enhanced treatment of CSO - Recommendations and developments in Germany

M. Uhl, U. Dittmer & S. Fuchs
Vertical flow sand filters have been developed as powerful tools for treatment of combined sewage overflow. Essentials of two technical guidelines (MUNLV (2003), DWA M 178 (2005)) are described which were recently worked out in Germany with significant contributions by the authors of this paper. The recommended layout comprises a retention basin on top of a sand filter layer (grain size 0/2 mm). The filter velocity is controlled by a throttle in the outflow. For...
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