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Incineration Slag as Key Element within a Methane Oxidation Layer on a Closed Landfill

Manuel Gruyters

ISBN 10: 3844018654 / ISBN 13: 9783844018653
Published by Shaker Verlag Mai 2013, 2013
New Condition: Neu Soft cover
From Agrios-Buch (Bergisch Gladbach, Germany)

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Neuware - The bacterial oxidation of methane by means of semi-permeable landfill top covers has recently become an increasingly accepted tool to mitigate climate damaging landfill gas emissions. In this vein, different substrates and installation technologies have been investigated throughout the world, with respect to regional climatic conditions, as well as to local substrate availability and legal framework conditions. Thereby, methanotrophic bacteria turned out to be reliant on stable environmental conditions regarding soil temperature, moisture, and soil gas diffusivity; below or above certain variability ranges, the bacteria are actually capable of adapting to given environmental conditions, but only up to a certain extent, and only by reducing their methane oxidation activity. However, the conditions of these laboratory studies and/or simulations do not necessarily equate to given, local conditions and so far, there are only insufficient experiences about long-term studies on real landfills. In this work, an interim coverage of a former landfill for municipal waste consisting of a ca. 20cm thick profiling layer of incineration slag, a ca. 80cm mighty layer of recultivation soil, and a ca. 20cm thick layer of compost as top soil was assessed regarding its suitability for bacterial methane oxidation. After a series of preliminary laboratory investigations, a testfield was installed at the oldest part of the landfill, where the gas production was most advanced, and where the active degassing system was switched off, to see if the interim coverage was able to cope with the given methane area loading during all seasons of the year. In an examination period of about three years, the soil temperature, soil moisture, and soil gas pressure were registered by means of data logs in different soil depths within the interim coverage to identify the environmental conditions. Periodical measurements of the gas concentrations of methane, carbon dioxide, and oxygen in various soil depths were performed to trace depth- and seasonal-related gas profiles, by which the depth of the methane oxidation layer was determined. At the same time, measurements of the stable carbon isotope composition of methane and carbon dioxide were performed to prove the bacterial methane oxidation. In order to examine the impact of time and settlement on porosity and permeability of the constructed interim coverage, measurements of the hydraulic conductivity and of the intrinsic gas permeability, as well as micrographic examinations were performed. 188 pp. Englisch. Bookseller Inventory # 9783844018653

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Title: Incineration Slag as Key Element within a ...

Publisher: Shaker Verlag Mai 2013

Publication Date: 2013

Binding: Taschenbuch

Book Condition:Neu

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