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Characterization of the microbial methane oxidation for landfill studies by stable isotope analysis ; Charakterisierung der mikrobiellen Methanoxidation für Deponiestudien mittels der Analytik stabiler Isotope
Next to water, carbon dioxide (CO2) and methane (CH4) are the most important greenhouse gases with regard to their radiative forcing effect. While the amount of CH4 in the atmosphere is by two orders of magnitude lower than that of CO2 its global warming potential is up to 28 times greater than that of CO2. The waste and wastewater sector contribute an important share to the total anthropogenic emissions of methane. In this particular case, landfills play an important role because worldwide the major amount of waste is deposited at landfill sites. Emissions of CH4 at landfill sites arise due to the production of landfill gas mainly from fermentation by obligate anaerobic microorganisms. It can be collected for energy production which allows an economic use and the mitigation of CH4 emissions to the atmosphere at the same time. Yet, both amount and concentration of CH4 released from the waste body decrease throughout time. As a consequence, for older landfills, the utilization of landfill gas for economic purposes is no longer possible. However, the German legislation demands the treatment of the landfill gas to reduce CH4 emissions to the atmosphere. An extension or alternative to active gas extraction and treatment are landfill cover layers that serve as methane oxidation layers. On the one hand their advantage is that they represent passive systems and in contrast to active systems need no additional machinery and little maintenance. On the other hand a general problem with these systems is the assessment of the performance of methane oxidation by an appropriate method. One suitable technique for that purpose is stable isotope analysis (SIA). It relies on the preferential consumption of the lighter 12CH4 over the heavier 13CH4 by methanotrophic bacteria within the cover layer which can be described by the isotopic enrichment factor ε. This preference results in an isotopic fractionation between the CH4 produced in the anaerobic zone of the waste body and the partially consumed CH4 emitted at the landfill’s ...
Characterization of the microbial methane oxidation for landfill studies by stable isotope analysis ; Charakterisierung der mikrobiellen Methanoxidation für Deponiestudien mittels der Analytik stabiler Isotope
Next to water, carbon dioxide (CO2) and methane (CH4) are the most important greenhouse gases with regard to their radiative forcing effect. While the amount of CH4 in the atmosphere is by two orders of magnitude lower than that of CO2 its global warming potential is up to 28 times greater than that of CO2. The waste and wastewater sector contribute an important share to the total anthropogenic emissions of methane. In this particular case, landfills play an important role because worldwide the major amount of waste is deposited at landfill sites. Emissions of CH4 at landfill sites arise due to the production of landfill gas mainly from fermentation by obligate anaerobic microorganisms. It can be collected for energy production which allows an economic use and the mitigation of CH4 emissions to the atmosphere at the same time. Yet, both amount and concentration of CH4 released from the waste body decrease throughout time. As a consequence, for older landfills, the utilization of landfill gas for economic purposes is no longer possible. However, the German legislation demands the treatment of the landfill gas to reduce CH4 emissions to the atmosphere. An extension or alternative to active gas extraction and treatment are landfill cover layers that serve as methane oxidation layers. On the one hand their advantage is that they represent passive systems and in contrast to active systems need no additional machinery and little maintenance. On the other hand a general problem with these systems is the assessment of the performance of methane oxidation by an appropriate method. One suitable technique for that purpose is stable isotope analysis (SIA). It relies on the preferential consumption of the lighter 12CH4 over the heavier 13CH4 by methanotrophic bacteria within the cover layer which can be described by the isotopic enrichment factor ε. This preference results in an isotopic fractionation between the CH4 produced in the anaerobic zone of the waste body and the partially consumed CH4 emitted at the landfill’s ...
Characterization of the microbial methane oxidation for landfill studies by stable isotope analysis ; Charakterisierung der mikrobiellen Methanoxidation für Deponiestudien mittels der Analytik stabiler Isotope
Schulte, Sven Marcel (author) / Schmidt, Torsten Claus
2018-05-11
Theses
Electronic Resource
English
Characterization of the microbial methane oxidation for landfill studies by stable isotope analysis
| UB Braunschweig | 2018
| HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2012
| UB Braunschweig | 2022