Impact of different plants on the gas profile of a landfill cover
- Health and Environment Department, Environmental Resources and Technologies, AIT - Austrian Institute of Technology GmbH, 2444 Seibersdorf (Austria)
- Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Applied Life Sciences, Peter Jordan-Strasse 82, 1190 Vienna (Austria)
Research highlights: > Plants influence gas profile and methane oxidation in landfill covers. > Plants regulate water content and increase the availability of oxygen for methane oxidation. > Plant species with deep roots like alfalfa showed more stimulation of methane oxidation than plants with shallow root systems like grasses. - Abstract: Methane is an important greenhouse gas emitted from landfill sites and old waste dumps. Biological methane oxidation in landfill covers can help to reduce methane emissions. To determine the influence of different plant covers on this oxidation in a compost layer, we conducted a lysimeter study. We compared the effect of four different plant covers (grass, alfalfa + grass, miscanthus and black poplar) and of bare soil on the concentration of methane, carbon dioxide and oxygen in lysimeters filled with compost. Plants were essential for a sustainable reduction in methane concentrations, whereas in bare soil, methane oxidation declined already after 6 weeks. Enhanced microbial activity - expected in lysimeters with plants that were exposed to landfill gas - was supported by the increased temperature of the gas in the substrate and the higher methane oxidation potential. At the end of the first experimental year and from mid-April of the second experimental year, the methane concentration was most strongly reduced in the lysimeters containing alfalfa + grass, followed by poplar, miscanthus and grass. The observed differences probably reflect the different root morphology of the investigated plants, which influences oxygen transport to deeper compost layers and regulates the water content.
- OSTI ID:
- 21550371
- Journal Information:
- Waste Management, Vol. 31, Issue 5; Other Information: DOI: 10.1016/j.wasman.2010.08.027; PII: S0956-053X(10)00453-8; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALFALFA
CARBON DIOXIDE
COMPOST
GRAMINEAE
GREENHOUSE GASES
LANDFILL GAS
LYSIMETERS
METHANE
MORPHOLOGY
OXIDATION
OXYGEN
OXYGEN POTENTIAL
POPLARS
SANITARY LANDFILLS
STIMULATION
SUBSTRATES
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY
ENERGY SOURCES
FLUIDS
FREE ENTHALPY
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
LEGUMINOSAE
LILIOPSIDA
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MANAGEMENT
MEASURING INSTRUMENTS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC WASTES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLANTS
THERMODYNAMIC PROPERTIES
TREES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES