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Identity and diversity of archaeal communities during anaerobic co-digestion of chicken feathers and other animal wastes

Xia, Y., Massé, D.I., McAllister, T.A., Kong, Y., Seviour, R., Beaulieu, C. (2012). Identity and diversity of archaeal communities during anaerobic co-digestion of chicken feathers and other animal wastes, 110 111-119. http://dx.doi.org/10.1016/j.biortech.2012.01.107

Abstract

Digestion of raw feathers in anaerobic digesters inoculated with adapted swine manure, slaughterhouse sludge or dairy manure was investigated using twelve 42-L anaerobic digesters at 25°C. After 120days 74%, 49% and 40% added feathers were converted to methane in swine manure, dairy manure and slaughterhouse sludge anaerobic digesters respectively. 16S rRNA gene clone library analyses identified twenty-one operational taxonomic units containing clone sequences from 5 genera, 5 families and 2 phyla of members of the Archaea from 158 sequenced clones. Fluorescence in situ hybridization revealed that methanogens from the Methanomicrobiales, Methanosarcinales and Methanobacteriales constituted a major fraction (>78%) of these Archaea. A high correlation was seen between the distribution of functional archaeal groups and the NH 3-N levels of digester mixed liquors. The compositions of archaeal communities fed different substrates were statistically significantly different (P<0.05). © 2012.

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