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Particle size and metal distributions in anaerobically digested pig slurry

Marcato, Claire-Emmanuelle and Pinelli, Eric and Pouech, Philippe and Winterton, Peter and Guiresse, Maritxu Particle size and metal distributions in anaerobically digested pig slurry. ( In Press: 2007) Bioresource Technology, Vol. 99 (n° 7). pp. 2340-2348. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/j.biortech.2007.05.013

Abstract

Particle size distribution and trace element patterns were studied in a full-scale anaerobic digestion plant treating pig slurry. Mass balance was established for major (N, P, K, Ca, Fe, Mg and S) and minor (Al, Cu, Mn and Zn) elements. Most of the elements were conserved through the process but part of the P, Ca, Mg and Mn was deposited as crystals lining the digester. In the dry matter of the slurry, Cu and Zn occurred at between 170 and 2600 mg kg1 due to pig diet supplements. Analyses of particle size distributions in raw and digested slurries showed a general shift in distribution towards larger sizes due to degradation of small and easily degradable particles as well as formation of large microbial filaments. Graded sieving of digested slurry showed metals to be mainly present on 3–25 lm particles. Less than 2% Cu and Zn was removed by passage through a 250 lm rotary screen.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com. The original PDF of the article can be found at Bioresource Technology website: http://www.sciencedirect.com/science/journal/09608524
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Association Pour l’Environnement et la Sécurité en Aquitaine - APESA (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Florence Amor
Deposited On:09 Jun 2010 14:53

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