Landfill Gas Energy Technologies

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

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Table 1. Set of data acc. to CA and AP42 Parameters CAA AP 42 Source: [5]. 3 Lo [m /t] 170 100 k [1/year] Methane concentration [%] 0.05 50 0.04 50 The application of the coefficients of organic decomposition, the US-EPA model describes very well the actual decomposition conditions in the municipal landfill. A wide range of values of the potential methane generation capacity (L0) seems to be a drawback of the method as well as lack of information on the structure and characteristic of a municipal solid waste landfill. Wrongly assumed values may increase or decrease the final results. IGNIG Model [4] In the IGNIG model the kinetic method used in the US EPA model has been greatly expanded. It is based on the first order kinetic model and considers 4 categories of solid wastes. Each category of organic wastes has its own half-life time t1/2, designated to it. The following half-life’s are available: Waste category: A – paper, textiles B – garden, park wastes, and others (except food) C – food D – wood and feed (except lignins) Half-life: tauA = 10 years tauB = 6 years tauC = 3 years tauD = 15 years The annual volume of methane produced (EmCH4) is a sum of a methane volume EmCH4r,x(i) produced in a given year from a waste mass MASA [Mg] deposited in the following years, x, prior the calculation year: EmCH4 =∑EmCH4T,x (A)+∑EmCH4T,x (B)+∑EmCH4T,x (C)+∑EmCH4T,x (D) 9

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