Vergleich veschiedener Deponieoberflachenabdichtungssysteme unter dem Aspekt Emissionsminimierung und Rekultivierbarkeit

verfasst von
J. Bachmann, D. Von Felde
Abstract

Since 1991 the Institute for Sanitary Engineering and Wastemanagement and the Institute of Soil Science of the University of Hannover investigate the gaswater- and temperature regime of test fields located on a municipal waste landfill having different sealing systems. The results show that surface sealing reduced considerably the landfill gas concentration in the recultivation layer above the sealing, reduced soil temperatures in the root zone, and enlarged the depth of the root zone. Combined sealings (clay mineral barrier covered with a plastic liner) are the most efficient systems in order to prevent gas emissions and increase oxygen concentrations in the root zone. The gasproofness of mineral sealings without a plastic liner depends on temperature and water content of the soil. Especially in summer the landfill gas concentration in the soil increased. This effect is assumed to occur due to desiccation and shrinking of the clay. Simple layers of non-cohesive material cause gas capture rates below 50% and do not provide a satisfying protection against methane emissions from landfills. Protection of the recultivated soil layer with long term durable sealing systems are considered to be essential for successful recultivation of the landfill. Examination of the planted vegetation shows, that the recultivation of the testfields seems to be successful for the first six years. Right now, however, it cannot be determined the high technical and financial efforts for constructing combined sealing systems are justified for future landfills which will contain pretreated, inert wastes with low emission rates.

Organisationseinheit(en)
Institut für Bodenkunde
AG Bodenphysik
Typ
Artikel
Journal
Zeitschrift fur Kulturtechnik und Landentwicklung
Band
39
Seiten
220-227
Anzahl der Seiten
8
ISSN
0934-666X
Publikationsdatum
09.1998
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Geografie, Planung und Entwicklung, Gewässerkunde und -technologie
Ziele für nachhaltige Entwicklung
SDG 11 – Nachhaltige Städte und Gemeinschaften