Anaerobic digestion of municipal solid waste: Thermophilic vs. mesophilic performance at high solids |
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| Institution: | 1. University di Venezia, Dipartimento Scienze Ambientali Calle Larga S. Marta, 2137, 30123 Venezia, Italy.;2. Universitat de Barcelona, Departament d''Enginyeria Quimica, C. Marti y Franquez, 1, 6p, 08028 Barcelona, Spain.;3. Snamprogetti S.p.A., Divisione Ecologia, Via Toniolo, 1, 61032 Fano (PS), Italy.;1. Centro Tecnológico Adesva, Avda. Dehesa Piorno, n°1, 21440 Lepe, Huelva, Spain;2. Centre for Research in Sustainable Chemistry – CIQSO, University of Huelva, Campus El Carmen, Avda. Fuerzas Armadas s/n, 21071 Huelva, Spain;1. Department of Chemical and Environmental Engineering, University of Oviedo, Gijón, Asturias 33203, Spain;2. Department of Materials Science and Metallurgical Engineering, University of Oviedo, Gijón 33203, Asturias, Spain;3. ALIMERKA Corporation, Llanera 33690, Asturias, Spain;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China;2. China Construction Bank Corporation, Beijing, China;1. College of Agronomy, Northwest A&F University, Shaanxi, Yangling 712100, China;2. Research Center for Recycling Agriculture Engineering Technology of Shaanxi Province, Shaanxi, Yangling 712100, China;3. College of Forestry, Northwest A&F University, Shaanxi, Yangling 712100, China;1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki-Aza, Aoba-Ku, Sendai, Miyagi 980-8579, Japan;4. Department of Frontier Science for Advanced Environment, Graduate School of Environmental Sciences, Tohoku University, 6-6-20 Aoba, Aramaki-Aza, Aoba-Ku, Sendai, Miyagi 980-8579, Japan;5. College of Resources and Environment, Northwest A&F University, Yangling 712100, China |
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| Abstract: | High solids anaerobic digestion of the mechanically sorted organic fraction of municipal solid waste under mesophilic and thermophilic conditions is reported. The semi-dry thermophilic process has a gas production rate two to three times the mesophilic process and nearly complete biodegradation. A 3 m3 stirred digester, feeding organic waste at 16–23% solids, was operated at hydraulic (volumetric) retention times decreasing from 15-8 days, and at organic loading rates increasing from 6 to 14 kg volatile solids m?3 day?1. An economic evaluation favours the thermophilic over the mesophilic process. |
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