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PLoS One

Title:		Effect of Storage Period on the Changes of Odorous Compound Concentrations and Bacterial Ecology for Identifying the Cause of Odor Production from Pig Slurry
Author(s):		Hwang OH; Cho SB; Han DW; Lee SR; Kwag JH; Park SK;
Address:		"National Institute of Animal Science, Rural Development Administration, Wanju-Gun, Jeollabuk-Do, Republic of Korea. Department of Food Science and Technology, Sejong University, Seoul, Republic of Korea"
Journal Title:		PLoS One
Year:		2016
Volume:		20160919
Issue:		9
Page Number:		e0162714 -
DOI:		10.1371/journal.pone.0162714
ISSN/ISBN:		1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:		"Odor from buildings where pigs are housed is generated by anaerobic fermentation of undigested materials in pig slurry stored for several weeks in pit. The objective of this study was to investigate the effect of storage period on the level of odorous compounds in pig slurry and on its bacterial community. A slurry sample (15 L) was taken from the pit of a finisher pig building and incubated in acryl chambers for six- weeks. Slurry for analysis was sampled every two-week. Levels of odorous compounds in the slurry sample were drastically changed after two weeks of storage period; levels of phenols and short chain fatty acids (SCFAs) were decreased (P<0.05), whereas indoles and branched-chain fatty acids (BCFAs) were increased (P<0.05). Among dominant bacteria, Bacteroides and Porphyromonadacese_uc_g revealed a strong positive correlation with the levels of phenols and SCFAs. Populations of AC160630_g, Acholeplasmatales_uc_g, Mollicutes_uc_g and Cloacamonas_f_uc_g positively correlated with indole and BCFAs content. Taken together, levels of odorous compounds were increased after two weeks of storage, possibly because of changes in the predominant bacterial groups to those that use protein as a carbon source in the hypo-carbohydrate conditions"
Keywords:		"Anaerobiosis Animal Husbandry Animals Bacteria/classification/genetics/*metabolism Fatty Acids, Volatile/analysis/metabolism Fermentation Indoles/analysis/metabolism Manure/*microbiology Odorants/*analysis Phenols/analysis/metabolism Sus scrofa Volatile O;"
Notes:		"MedlineHwang, Ok Hwa Cho, Sung Back Han, Deug Woo Lee, Sang Ryoung Kwag, Jeong Hoon Park, Sung Kwon eng 2016/09/20 PLoS One. 2016 Sep 19; 11(9):e0162714. doi: 10.1371/journal.pone.0162714. eCollection 2016"