Temporal variation in methanogen communities of four different full-scale anaerobic digesters treating food waste-recycling wastewater

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Methanogen communities were investigated using 454 pyrosequencing in four different full-scale anaerobic digesters treating food waste-recycling wastewater. Seasonal samples were collected for 2 years, and 24 samples were available for microbial analysis from a plug flow thermophilic (PT) digester, a continuously- stirred tank thermophilic (CT) digester, an upflow anerobic sludge blanket mesophilic (UM) digester, and a continuously-stirred tank mesophilic (CM) digester. Methanoculleus, Methanobacterium, Methanothermobacter, and Methanosaeta were revealed to be key methanogens in full-scale anaerobic digestion process treating food waste-recycling wastewater. In the PT digester, Methanoculleus was dominant (96.8%). In the CT digester, Methanoculleus was dominant (95.4%) during the first year of operation, but the dominant genus was shifted to Methanothermobacter (98.5%) due to pH increase. In the UM digester, Methanosaeta was dominant (87.2%). In the CM digester, Methanoculleus was constantly dominant (74.8%) except during CM5 when Methanosaeta was dominant (62.6%) due to the low residual acetate concentration (0.1 g/L).
Publisher
ELSEVIER SCI LTD
Issue Date
2014-09
Language
English
Article Type
Article; Proceedings Paper
Keywords

DIVERSITY; AMMONIA

Citation

BIORESOURCE TECHNOLOGY, v.168, pp.59 - 63

ISSN
0960-8524
DOI
10.1016/j.biortech.2014.03.161
URI
http://hdl.handle.net/10203/201213
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