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Mesophilic digestion of the organic fraction of refuse: Performance and kinetic study
Institution:1. Dipartimento Scienze Ambientali, Università di Venezia. Calle Larga S. Marta 2137, 30123 Venezia, Italy;2. Departament d''Enginyeria Quimica, Universitat de Barcelona. C. Marti i Franquès, 1, 6p., 08028 Barcelona, Spain;1. College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China;2. Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, PR China;3. College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China;1. Institute for Environmental Biotechnology, IFA-Tulln, University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz Straße 20, 3430 Tulln, Austria;2. Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Wien, Austria;1. Paul Scherrer Institut, Division Energy and Environment, Thermochemical Processes Group, CH5232 Villigen PSI, Switzerland;2. ZHAW School of Life Sciences and Facility Management, 8820, Wädenswil, Switzerland;3. Politecnico di Torino, Energy Department (DENERG), Corso Duca degli Abruzzi, 24, 10129 Turin, Italy;1. Sustainable Process Integration Laboratory - SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology - VUT Brno, Technická 2896/2, 616 69, Brno, Czech Republic;2. Department of Bioprocess Engineering, Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia (UTM), 81310 UTM Johor Bahru, Johor, Malaysia;3. Centre for Process Integration, School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, M13 9PL, United Kingdom
Abstract:The anaerobic digestion of the organic fraction of municipal solid waste sorted by plant was investigated in a 3 m3 stirred digester, operating under mesophilic conditions. Yields of gas obtained at 7 kg total volatile solids per m3 per day and 15-day hydraulic residence time (about 10% biodegradeable solids, 20% total solids) were as much as 1.6 times the digester volume per day. Better sorting should improve the yields which already compare favorably with the existing literature data. A kinetic study on the substrate utilization was performed by employing the “first order” model.
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