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Influence of soil physical parameters on removal efficiency and hydraulic conductivity of vertical flow constructed wetlands

Bruch, I. and Alewell, U. and Hahn, A. and Hasselbach, R. and Alewell, C.. (2014) Influence of soil physical parameters on removal efficiency and hydraulic conductivity of vertical flow constructed wetlands. Ecological engineering, Vol. 68. pp. 124-132.

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Official URL: http://edoc.unibas.ch/dok/A6337897

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Abstract

Low cost filter materials for efficient waste water treatment in constructed wetlands are worldwide in demand. However, information on soil physical parameters needed for efficient treatment is scarce. We investigated 5 different lava and one fluviatile operating sand filters in Germany for their differences in pore size distribution spectra, specific inner surface area and cumulative pore volume. While these soil physical parameters did have an influence on purification capacity and hydraulic conductivity, differences in mineralogy (presence of zeolites), waste water distribution systems (baffle plates versus pipes) and loading rates were the dominating factors determining filter efficiency. Lava sands convince with high purification capacities during permanent loading rates of <100 mm d(-1), average loading rates of 20 g COD m(-2) d(-1) (chemical oxygen demand) and approximate effective loading rates of up to 250 g COD m(-2) d(-1). (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Umweltgeowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Alewell, Christine
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0925-8574
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:06 Mar 2015 07:44
Deposited On:06 Mar 2015 07:44

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