Observations on microbial activity in acidified pig slurry

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dc.contributor.author Ottosen, L D M en_US
dc.contributor.author Poulsen, H V en_US
dc.contributor.author Nielsen, Daniel en_US
dc.contributor.author Finster, K en_US
dc.contributor.author Nielsen, Lars en_US
dc.contributor.author Revsbech, Niels en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T10:56:25Z
dc.date.available 2012-02-02T10:56:25Z
dc.date.issued 2009 en_US
dc.identifier 2010004241 en_US
dc.identifier.citation Ottosen L D M et al. 2009, 'Observations on microbial activity in acidified pig slurry', Academic Press Inc Elsevier Science, vol. 102, no. 3, pp. 291-297. en_US
dc.identifier.issn 1537-5110 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/15316
dc.description.abstract Acidification of pig slurry to pH 5.5 is used as a measure to reduce ammonia emission from pits and storages. The slurry is acidified with sulphuric acid in a process tank and pumped back to the slurry pits or to a storage tank. We investigated the effect of acidification on microbial activity. Oxygen consumption rate, methanogenesis and sulphate reduction were all reduced by more than 98% in the stored acidified slurry compared to untreated slurry. Despite higher sulphate concentration, the microbial metabolism was greatly compromised or absent in the acidified slurry. This could be explained by the high concentration of protonized short-chained volatile fatty acids in the acidified slurry (approximately 25 mM, compared to untreated slurry <0.1 mM), which act as an uncoupling agent of the cell membrane potential and thereby arrest microbial metabolism. In total the consequences of slurry acidification are greatly reduced production rates and loss of sulphide and methane, and eliminated loss of ammonia. On the other hand, increased volatilization and loss of smelly fatty acids is to be expected. en_US
dc.language en_US
dc.publisher Academic Press Inc Elsevier Science en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.biosystemseng.2008.12.003 en_US
dc.title Observations on microbial activity in acidified pig slurry en_US
dc.parent Biosystems Engineering en_US
dc.journal.volume 102 en_US
dc.journal.number 3 en_US
dc.publocation San Diego en_US
dc.identifier.startpage 291 en_US
dc.identifier.endpage 297 en_US
dc.cauo.name SCI.Plant Functional Biology & Climate Change en_US
dc.conference Verified OK en_US
dc.for 090300 en_US
dc.personcode 0000069404 en_US
dc.personcode 0000069405 en_US
dc.personcode 112277 en_US
dc.personcode 0000069406 en_US
dc.personcode 0000069396 en_US
dc.personcode 0000062297 en_US
dc.percentage 100 en_US
dc.classification.name Biomedical Engineering en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity WOS:000264558300005 en_US
dc.description.keywords Atmospheric Ammonia; Emission Inventory; Sulfate Reduction; Reduced Nitrogen; Fresh-Water; Storage; Vegetation; Sediments; Acids; Soil en_US


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