Microbiological aspects of anaerobic digestion of swine slurry in upflow fixed-bed digesters with different packing materials |
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| Affiliation: | 1. Faculty of Science, Department of Physics, Cumhuriyet University, 58140 Sivas, Turkey;2. Faculty of Technology, Department of Optical Engineering, Cumhuriyet University, 58140 Sivas, Turkey;3. Faculty of Science, Department of Physics, Dokuz Eylül University, 35160 Buca, İzmir, Turkey;1. Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;2. Department of Water Supply and Environmental Engineering, Arba Minch University, P.O. Box 21, Arba Minch, Ethiopia;3. Department of Petroleum & Gas Engineering, Dawood University of Engineering & Technology, New MA Jinnah Road, Karachi, 74800, Pakistan;1. Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Max-Eyth-Allee 100, 14469 Potsdam, Germany;2. Technische Universität Berlin, Faculty of Process Sciences, Straße des 17. Juni 135, 10623 Berlin, Germany;1. Department of Environmental and Municipal Engineering, Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China;2. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia;3. State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China;1. Chemical Wood Technology, Department of Wood Science, University of Hamburg, Leuschnerstr. 91B, 21031 Hamburg, Germany;2. Chemical Engineering Department, University of Córdoba, Building Marie-Curie, Campus of Rabanales, 14071 Córdoba, Spain;3. Department of Paper Technology and Mechanical Process Engineering, University of Darmstadt, Alexanderstr. 8, 64283 Darmstadt, Germany |
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| Abstract: | Samples taken from liquid influents, liquid effluents, bottom sediments and biofilms attached to the supports of three laboratory anaerobic, fixed-bed, upflow digesters, filled with wood chips, PVC or expanded-clay support media and fed with swine slurry, were tested microbiologically. The numbers of anaerobic heterotrophic, anaerobic cellulolytic, acidogenic-peptone-glucose fermenting and methanogenic bacteria were determined. For each digester the biogas production was monitored.The highest biogas production, referred to the volatile solids concentration in the feed, was obtained in the digester with wood chips, while production was almost nil in the digester with expanded clay. |
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