An articulated monitoring plan was arranged in order to set up an adequate measure campaign of the possible landfill gas escape from landfill body, with the aim of assuring scientific significance and coherence for the evaluation of vertical landfill gas emissions (i.e. from landfill surfaces in contact with atmosphere) and of horizontal landfill gas emissions (i.e. landfill gas migration through soil and subsoil toward the outside of landfill cultivation area).
With the aim of reducing Greenhouse gases emissions and in general environmental impact of landfills, scientific research has been concentrated, since several years, on monitoring and control of non-collected emissions of landfill gas, since these are the main responsible for the landfill environmental load. With reference to these issues, the proposed study is concerned with the management of two non-hazardous waste landfills, located in Tuscany Region (Italy). The study, which is part of a lager project aimed to manage and optimise the energy recovery potential carried by the landfill gas coming from waste biodegradation, is concerned, in this first phase, with the estimation of landfill gas emissions from landfill covers, the analysis of the collection system efficiency, and the research of a spatial correlation between emissive areas and the type of landfill covers in order to optimise the possible interventions onsite.
Copyright: | © IWWG International Waste Working Group | |
Quelle: | Specialized Session F (Oktober 2007) | |
Seiten: | 10 | |
Preis inkl. MwSt.: | € 10,00 | |
Autor: | Andrea Corti Lidia Lombardi Ing. Isabella Pecorini Luana Frassinetti | |
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A YEAR’S MONITORING OF A PASSIVE LANDFILL GAS BIOFILTER
© IWWG International Waste Working Group (10/2007)
In landfill rehabilitation programs, biogas management is a major issue. If biogas production is not sufficient for a flare to perform—methane concentration at an average of 30 % and biogas generation under 10 cubic metre per hour—, alternative solutions can be imagined. In particular, numerous writers have shown that it is possible to treat some of that methane by oxidation in the landfill cap or even by using a biofilter. This study takes a look at a French experimental site using this kind of landfill gas treatment.
COMPARISON OF A TUNABLE DIODE LASER APPROACH WITH STATIC CHAMBERS FOR DETERMINATION OF SURFACE METHANE EMISSION
© IWWG International Waste Working Group (10/2007)
Increasingly there is a need to determine methane emission rates from landfills. These determinations are needed for greenhouse gas inventories, for constraining estimates of emissions of non-methane organic compounds and for determining the efficiency of gas collection systems. Measurement campaigns to determine methane emissions from landfills are not overly common although a number of studies have been published, frequently using static chambers as a measurement vehicle (Bogner et al., 1997a, b, 1993). The disadvantage of this approach is that it is time consuming and requires a large number of measurements to constrain estimates from large landfill surfaces. The chamber approach also will not detect emissions from above the soil surface which might be due to leaky gas plumbing fixtures.
GREENHOUSE GAS BALANCE OF DIFFERENT WASTE MANAGEMENT STRATEGY
© IWWG International Waste Working Group (10/2007)
The well-known principles of the Waste-Hierarchy (Council of European Communities 1991), which lists minimization of waste production as first priority before recycling, and prior to treatment by means of incineration and landfilling has been widely accepted by policy makers and industry experts. However, it is evident that even with growing environmental awareness during the 1990’s and well implemented glass and paper recycling schemes through source segregation in most western countries, we still generate an increasing amount of mixed municipal solid waste (MSW).
OPERATIONAL FACTORS DETERMINING PERFORMANCE OF LANDFILL GAS PROJECTS UNDER KYOTO PROTOCOL MECHANISMS
© IWWG International Waste Working Group (10/2007)
Waste management is inevitably linked to carbon management since there is a direct relationship between the treatment and disposal of waste with certain emissions released to the atmosphere. The nature and amount of emissions depend on the method used. The threat of climate change has focussed attention on greenhouse gas production from waste disposal. Landfill is the oldest form of waste treatment due to its historical simplicity of ‘hide’ the waste. Undoubtedly, the concept of Reduce, Reuse and Recycle (3R) is the most sustainable waste management approach nowadays. However, the evolution from landfilling to the 3R concept is happening gradually and at different rates worldwide.
BASIS TO SUPPORT THE DEVELOPMENT OF A NEW METHODOLOGY TO DETERMINE AVOIDED GREENHOUSE GAS EMISSIONS FROM IN SITU AEROBIC STABILIZATION OF LANDFILLS
© IWWG International Waste Working Group (10/2007)
The aerobic stabilization of landfilled waste by artificial injection of air into a landfill has been a subject for research for many years, with several case studies indicating enhanced waste degradation, processing of leachate, elimination of odors, and reduced methane emissions. Anaerobic conditions that characteristically develop in conventional landfills result in methanogenic decomposition, whereby organic carbon materials are metabolized into methane and carbon dioxide. In contrast, aerobic stabilization fundamentally changes the degradation process by utilizing aerobic bacteria, which consume oxygen and nutrients in the waste to metabolize organic carbon materials into carbon dioxide, water, and biomass.