Composting kinetics in full-scale mechanical–biological treatment plants |
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| Authors: | Marco Baptista Fernando Antunes Manuel Souteiro Gonçalves Bernard Morvan Ana Silveira |
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| Institution: | 1. Departamento de Ciências e Engenharia do Ambiente, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal;2. Unidade de Ambiente e Recursos Naturais, Instituto Nacional de Investigação Agrária, Instituto Nacional de Recursos Biológicos, I.P., Apartado 3228, 1301-903 Lisboa, Portugal;3. Departamento e Centro de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, Ed. C8, Campo Grande, P-1749-016 Lisboa, Portugal;4. Cemagref, 17 Avenue de Cucille, CS 64427, F-35044 Rennes cedex, France;1. Université de Sfax, ENIS, Unité Enzymes et Bioconversion, Route de Soukra Km 4, BP 1173, 3038 Sfax, Tunisia;2. Université de Sfax, ENIS, Laboratoire des Biotechnologies Végétales Appliquées à l’Amélioration des Cultures, Route Soukra Km 4, BP 1173, 3038 Sfax, Tunisia;1. Department of Chemical Engineering, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain;2. Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 115, 2800 Kgs. Lyngby, Denmark;1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin, Heilongjiang 150090, PR China;2. State Key Laboratory of Urban Water Resource and Environment (SKLUWER), Harbin Institute of Technology, Harbin 150090, PR China;1. Department of Chemical Engineering, University of Barcelona, C/ Martí i Franquès, no. 1, 6th floor, 08028 Barcelona, Spain;2. Centre for Solid Waste Bioprocessing, Schools of Civil and Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia;3. Advanced Water Management Centre, The University of Queensland, St Lucia, QLD 4072, Australia;4. Ecoparc del Mediterrani, S.A., Av. Eduard Maristany s/n, 08930 Sant Adrià del Besós, Spain;5. CESPA, S.A., C/ Número 4, 08040 Barcelona, Spain;1. Department of Systems Engineering, Faculty of Technical Sciences, University of Warmia and Mazury in Olsztyn, Heweliusza 14, 10-718 Olsztyn, Poland;4. Institute of Biosystems Engineering, Poznan University of Life Sciences, Wojska Polskiego 50, 60-637 Poznan, Poland;5. Department of General and Environmental Microbiology, Poznan University of Life Sciences, Szyd?owska 50, 60-656 Poznan, Poland |
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| Abstract: | This study focuses on the investigation of the kinetics of municipal solid waste composting in three full-scale mechanical–biological treatment (MBT) plants. The aims were to test a kinetic model based on volatile solids (VS) content change for describing the composting process in MBT plants, and to identify the model parameters that affected the estimation of the reaction rate constant most. To achieve this, VS content and several environmental conditions, namely temperature, moisture content, oxygen concentration and total bulk density were monitored throughout the composting process. Experimental data was fitted with a first-order kinetic model, and a rate constant (k) characteristic of composting under optimum environmental conditions was obtained. The kinetic model satisfactorily described the experimental data for the three MBT plants. k values ranged from 0.043 ± 0.002 d?1 to 0.082 ± 0.011 d?1. Sensitivity analysis showed that the model parameters that most affected the estimation of k were the initial biodegradable volatile solids content, the maximum temperature for biodegradation and the optimum moisture content. In conclusion, we show for the first time that full-scale MBT plants can be successfully modelled with a composting kinetic model. |
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