Purification capacity of constructed wetlands
Project funded by own resources
Project title Purification capacity of constructed wetlands
Principal Investigator(s) Alewell, Christine
Co-Investigator(s) Fritsche, Johannes
Organisation / Research unit Departement Umweltwissenschaften / Umweltgeowissenschaften (Alewell)
Project start 01.10.2007
Probable end 31.12.2013
Status Completed
Abstract

The physical and chemical properties of three different lava sands used in constructed wetlands
for municipal wastewater treatment were investigated. The aim was to identify those properties
and mechanisms that render lava sands as highly efficient filter media which could substitute conventional,
fluviatile sands. It was shown that although lava sands per se may be suitable filter materials,
the presence of zeolite minerals within the lava sands enhances the purification efficiency tremendously.
Zeolites not only increase the sorption capacity, but even more important, they are able to absorb water
in large amounts, which in turn leads to stronger swelling. The latter reduces hydrological conductivity
considerably, resulting in a longer contact time to eliminate pollutants. A simple mineralogical survey of
filter materials for the presence of zeolites may render many installations of constructed wetlands
successful.

Keywords constructed wetlands, waste water, zeolithes
Financed by Other funds

Published results ()

  ID Autor(en) Titel ISSN / ISBN Erschienen in Art der Publikation
410762  Bruch, Ingo; Fritsche, Johannes; Bänninger, Dominik; Alewell, Ulrike; Sendelov, Michael; Hürlimann, Heinz; Hasselbach, Ralf; Alewell, Christine  Improving the treatment efficiency of constructed wetlands with zeolite-containing filter sands    Bioresource Technology  Publication: JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift) 
2828907  Bruch, I.; Alewell, U.; Hahn, A.; Hasselbach, R.; Alewell, C.  Influence of soil physical parameters on removal efficiency and hydraulic conductivity of vertical flow constructed wetlands  0925-8574  Ecological engineering  Publication: JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift) 

Cooperations ()

  ID Kreditinhaber Kooperationspartner Institution Laufzeit - von Laufzeit - bis
984264  Alewell, Christine  Hasselbach, Ralf  EVS Saarland  01.10.2007  31.12.2015 
984260  Alewell, Christine  Bruch, Ingo, Dr.  Consulting Büro Bruch-Alewell  01.10.2007  31.12.2015 
2365889  Alewell, Christine  Dr. Andreas Hahn  ZetA Partikelanalytik GmbH, Mainz  12.07.2008  31.12.2015 
   

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