Modelling and assessment of landfill gas generation at afyonkarahisar landfill site

Karayılan, Sevde
Management of municipal solid wastes is one of the important environmental problems because of increasing population and developing industrialization in our country. Besides, there is a need to seek alternative energy sources due to rapid consumption of conventional energy sources. Landfilling is still the most common solid waste disposal method in the world and generated landfill gas consists of significant amount of methane that could be used for energy generation. In this study, it is aimed to model the landfill gas generation at different waste composition scenarios at Afyonkarahisar Sanitary Landfill Site. LandGEM and IPCC 2006 models were used for estimating the landfill gas amounts and determining energy content of the gas in the site. According to model results, methane generation rate (k) and methane generation potential (L0) were 1.56 1/year and 44.12 m3/Mg, respectively. When organic wastes are stored in the site separately, 40% higher methane gas generation could be obtained. With separation of ash, 24% increase could be obtained. In addition, service life of the lots increased. On the other hand, if recyclable wastes were separated from the waste for storage, methane gas generation was approximately the same as the base case due to small percentage of recyclables in the waste. Greenhouse gas (GHG) emission evaluations showed that only organic waste storage scenario provides 0.6% reduction in GHG emissions in Turkey.