Impact of crop species on bacterial community structure during anaerobic co-digestion of crops and cow manure |
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| Authors: | Hong Wang Annimari Lehtomäki Katariina Tolvanen Jaakko Puhakka Jukka Rintala |
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| Affiliation: | 1. Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland;2. Jyväskylä Innovation Ltd., P.O. Box 27, FI-40203 Jyväskylä, Finland;3. Institute of Environmental Engineering and Biotechnology, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland;1. BioenergieBeratungBornim GmbH, Max-Eyth-Allee 101, 14469 Potsdam, Germany;2. Leibniz-Institute for Agricultural Engineering Potsdam-Bornim, Department Technology Assessment and Substance Cycles, Max-Eyth-Allee 100, 14469 Potsdam, Germany;3. Julius Kühn-Institut, Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Field Crops and Grassland, Messeweg 11/12, 38104 Braunschweig, Germany;4. Division Phytomedicine, Faculty of Agriculture and Horticulture, Humboldt University of Berlin, Lentzeallee 55, 14195 Berlin, Germany;1. School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea;2. Department of Chemical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea;3. Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea;1. Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126 Torino, Italy;2. SMAT – Depuratore di Castiglione Torinese, Società Metropolitana Acque Torino S.p.A., Corso XI Febbraio 14, 10152 Torino, Italy |
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| Abstract: | The bacterial communities in three continuously stirred tank reactors co-digesting cow manure with grass silage, oat straw, and sugar beet tops, respectively, were investigated by 16S rRNA gene-based fingerprints and clone libraries. The analyses revealed both clearly distinct and similar phylotypes in the bacterial communities between the reactors. The major groups represented in the three reactors were Clostridia, unclassified Bacteria, and Bacteroidetes. Phylotypes affiliated with Bacilli or Deltaproteobacteria were unique to the sugar beet and straw reactor, respectively. Unclassified Bacteria dominated in sugar beet reactor while in the straw and grass reactor Clostridia was the dominant group. An increase in organic loading rate from 2 to 3 kg volatile solids m?3 d?1 resulted in larger changes in the bacterial community in the straw compared to grass reactor. The study shed more light on the evolution of bacterial community during anaerobic co-digestion of different crops and manure to methane. |
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