10.4122/1.1000001628
Kutzner, R.
R.
Kutzner
Geiger, W.F.
W.F.
Geiger
Quantifying the effects of sedimentation and remobilization of solids in a CSO wetland
DTU Library, Technical University of Denmark (DTU)
2005
Conference full text
Combined sewer overflow
wetland
sedimentation
remobilization
settling velocity
University Duisburg-Essen, Section Of Urban Water Management
Section Of Urban Water Management
University Duisburg-Essen
2005
en
10.4122/1.1000001627
application/pdf
For facilities for the treatment of wet weather flows regarding to standards based on the immission approach a very detailed knowledge about the removal efficiency is necessary. One of the relevant parameters to characterize the matter loads discharged to the receiving water is Total Suspended Solids (TSS). Because of that, the TSS treatment efficiency of a surface flow wetland was researched for more than one decade. In the first instance it seemed to be possible to model the TSS-removal by a simple two parameter first order decay function. But enhanced validation showed that this is not possible. By analysing time series of settling velocity distribution it was possible to quantify the effect of sedimentation, adsorption and remobilization to the removal of several sinking velocity fractions. This could be the basis for the optimization of these kind of structures and for the development of more sophisticated mathematical models.