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Landfill Gas Energy Technologies

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Landfill Gas Energy Technologies ( landfill-gas-energy-technologies )

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US EPA Model [4] The accuracy of calculations made using this model depends on the quality of data regarding the quantity and composition of waste accepted by a landfill and the manner in which it was deposited [5]. The volume of methane produced during one year QT is a sum of a methane volume QTx produced in the year T from waste mass Mx, accepted in subsequent years x prior to the year T: QT =∑QT,x The volume of methane produced in T year from waste mass Mx deposited in year x is calculated using the following equation: QT,x =k⋅Mx ⋅Lo ⋅e−k(T−x)[m3CH4] where: x - T - k - Lo - year of waste deposition, year of emission calculation, methane generation rate; it is assumed that k is a function of solid waste moisture, nutrients supply for methanogenic bacteria, pH and temperature. It value remains within -1 the range from 0,003 to 0,21 year 3 potential methane generation capacity, i.e. methane volume [m ] generated per solid waste mass unit [6]. The US-EPA model includes specific values of the methane generation rate constant and potential methane generation capacity (two sets of data called CAA and AP 42). The CAA data (see Clean Air Act) based on the requirements of the New Source Performance Standards (NSPS). The AP-42 (U.S. EPA manual) use emissions coefficients that are more representative of typical municipal solid waste landfill. The values of the parameters are presented in Table 1. 8

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