Horizontal subsurface flow constructed wetlands have proven their efficiency in treating wastewater and removing the pollutants of concern. Treatment efficiency depends on the wastewater residence time, which is a function of the hydraulic loading and the physical conditions of the constructed filter system, which can be described with effective parameters such as: hydraulic conductivity, porosity, dispersivity etc. Because spatial variability is often scale dependent, these effective parameters may be affected by the scale of the system being studied. In this paper the results of tracer experiments in constructed filters using saturated horizontal flow at three scales (small and medium lab scales and full-scale system) using the same filter media is reported. Light-weight aggregate (filter media termed Filtralite-PTM) was used at all scales. Increasing the scale was associated with increasing dispersivity, meanwhile hydraulic conductivity experienced dramatic reduction and variation by increasing the examined scale. Observed changes in the hydraulic parameters indicate that heterogeneity at different scales should be taken into account when the performance of LWA filters are evaluated from small-scale experiments.
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Research Article|
May 01 2005
The effect of the scale of horizontal subsurface flow constructed wetlands on flow and transport parameters Available to Purchase
F. Suliman;
*Department of Mathematical Sciences and Technology, Agricultural University of Norway, P.O. Box 5003, N-1432 Ås, Norway (E-mail: [email protected]; [email protected])
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H. French;
H. French
**Centre for Soil and Environmental Research, Agricultural University of Norway, Frederik A. Dahls 20, N-1432 Ås, Norway (E-mail: [email protected])
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L.E. Haugen;
L.E. Haugen
***Department of Plant and Environmental Sciences, Agricultural University of Norway, P.O. Box 5003, N-1432 Ås, Norway (E-mail: [email protected])
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B. Kløve;
B. Kløve
****Water Resources and Environmental Engineering Laboratory, University of Oulu, P.O. Box 4300, 90014 University of Oulu, Finland (E-mail: [email protected])
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P. Jenssen
P. Jenssen
*Department of Mathematical Sciences and Technology, Agricultural University of Norway, P.O. Box 5003, N-1432 Ås, Norway (E-mail: [email protected]; [email protected])
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Water Sci Technol (2005) 51 (9): 259–266.
Citation
F. Suliman, H. French, L.E. Haugen, B. Kløve, P. Jenssen; The effect of the scale of horizontal subsurface flow constructed wetlands on flow and transport parameters. Water Sci Technol 1 May 2005; 51 (9): 259–266. doi: https://doi.org/10.2166/wst.2005.0332
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