English: Students from Aberystwyth University view the leachate lagoon at Nantmel landfill site, Powys. (Photo taken from on top of the biofilm tower)
Français : Étudiants de l'Université d'Aberystwyth visitant la lagune de traitement des lixiviats du site d'enfouissement Nantmel, Powys. (photo prise du sommet d'une Tour à biofilm ("Biofilm tower") qui favorise un biofilm aérobie devant dégrader la plupart des composés organiques, fixer les ions métalliques en formes oxydés ou insolubles (par exemple, en transformant le fer ferreux en fer ferrique), oxyder l'Ammoniaque (via une phase nitrite) en nitrate, précipiter d'autres métaux que l'on retrouvera dans les boues de la lagune sous forme d'hydroxydes ferriques (source).
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{{Information |Description= Students from Aberystwyth University view the leachate lagoon at Nantmel landfill site, Powys. (Photo taken from on top of the biofilm tower) |Source=self-made |Date=22nd April 2008 |Author= PhilMacD |Permissi