TY  - JOUR
A1  - Stricker, Max
A1  - Tobias, Littfinski
A1  - Eva, Heinz
A1  - Klaus Hans, Pecher
A1  - Manfred, Lübken
A1  - Grüning, Helmut
A1  - Marc, Wichern
T1  - Design-oriented evaluation of the hydrodynamics in a full-scale combined filter-lamella separator for urban stormwater treatment
T2  - Water Science and Technology
N2  - The development of compact treatment devices with high removal efficiencies and low space requirements is a key objective of urban stormwater
treatment. Thus, many devices utilize a combination of sedimentation and upward flow filtration in a single system. This study, for the
first time, evaluates the flow field inside a combined filter-lamella separator via computational fluid dynamics. Herein, three objectives
are investigated: (i) the flow field for different structural configurations, (ii) the distribution of particulate matter along the filter bed and
(iii) the dynamic clogging in discrete filter zones, which is addressed by a clogging model derived from literature data. The results indicate
that a direct combination of a filtration stage with a lamella separator promotes a uniform flow distribution. The distribution of particulate
matter along the filter bed varies with configuration and particle size. Clogging, induced by particles in the spectrum ,63 μm, creates
gradients of hydraulic conductivity along the filter bed. After treating about half of Germany’s annual runoff-efficient precipitation at a rainfall
intensity of 5 L/(s·ha), the filtration rates increase in the front of the filter bed by þ10%. Thus, long-term operating behavior is sensitive to
efficient filter utilization in compact treatment devices.
KW  - Stormwater treatment
KW  - Filter-Lamella-Separator
Y1  - 2022
UR  - https://www.hb.fh-muenster.de/opus4/frontdoor/index/index/docId/15104
SN  - 0273-1223
VL  - Vol 85
IS  - No 10
SP  - 2854
EP  - 2868
ER  -