Observations from using models to fit the gas production of varying volume test cells and landfills |
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| Authors: | Julia Lamborn |
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| Institution: | 1. Universitat Politècnica de Catalunya, Department of Electrical Engineering, 08222 Terrassa, Spain;2. Universitat Politècnica de Catalunya, Department of Electrical Engineering, 08028 Barcelona, Spain;3. Universitat Politècnica de Catalunya, Department of Automatic Control, 08028 Barcelona, Spain;1. School of Electrical Engineering, Northeast Electric Power University, 132012 Jilin, China;2. State Grid Jibei Electric Power Company, Chengde Power Supply Company, 067000 Chengde, China;3. State Grid Jilin Electric Power Company, Jilin Power Supply Company, 132001 Jilin, China;1. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China;2. College of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, China;3. School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China;4. Mississippi International Water (China) Co. Ltd., Hangzhou 310023, China;1. Pan African University Institute of Water and Energy Sciences (including Climate Change) PAUWES c/o University Abou Bekr Belkaïd - Tlemcen, B.P. 119 Pôle Chetouane, Tlemcen 13000, Algeria;2. Department of Applied Geology, Universität Göttingen, Goldschmidtstraße 3, D - 37077 Göttingen, Germany |
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| Abstract: | Landfill operators are looking for more accurate models to predict waste degradation and landfill gas production. The simple microbial growth and decay models, whilst being easy to use, have been shown to be inaccurate. Many of the newer and more complex (component) models are highly parameter hungry and many of the required parameters have not been collected or measured at full-scale landfills. This paper compares the results of using different models (LANDGEM, HBM, and two Monod models developed by the author) to fit the gas production of laboratory scale, field test cell and full-scale landfills and discusses some observations that can be made regarding the scalability of gas generation rates.The comparison of these results show that the fast degradation rate that occurs at laboratory scale is not replicated at field-test cell and full-scale landfills. At small scale, all the models predict a slower rate of gas generation than actually occurs. At field test cell and full-scale a number of models predict a faster gas generation than actually occurs.Areas for future work have been identified, which include investigations into the capture efficiency of gas extraction systems and into the parameter sensitivity and identification of the critical parameters for field-test cell and full-scale landfill predication. |
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