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RESEARCH ARTICLE
Contents Vol 48(2)

GHG emissions during the storage of rough pig slurry and the fractions obtained by mechanical separation

E. Dinuccio A C , P. Balsari A and W. Berg B
+ Author Affiliations
- Author Affiliations

A Department of Agricultural, Forest and Environmental Economics and Engineering, Section of Mechanics, University of Turin, Italy.

B Leibniz-Institute for Agricultural Engineering Potsdam-Bornim (ATB), D-14469 Potsdam, Germany.

C Corresponding author. Email: elio.dinuccio@unito.it

Australian Journal of Experimental Agriculture 48(2) 93-95 https://doi.org/10.1071/EA07239
Submitted: 6 August 2007  Accepted: 11 November 2007   Published: 2 January 2008

Abstract

Emissions of methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) and ammonia (NH3) during the storage of rough pig slurry and the fractions (solid and liquid) obtained by mechanical separation were investigated in a laboratory-scale study. Manures were stored for a period of 30 days in open vessels (1500 cm3 capacity) within a climate-controlled room which was kept at 25 ± 0.2°C. Gaseous emissions were determined with the dynamic chamber method by infrared photoacoustic detection. The main GHG emission from the liquid manures was CH4. CH4 losses from both liquid and solid fractions together were 3% higher than from the rough slurry. CO2 losses from both liquid and solid fractions together increased by 10% compared with rough pig slurry. Appreciable N2O fluxes were only measured from the solid fraction. Combining the losses during the storage of both liquid and solid fraction, they resulted in reduced NH3 emissions compared with the storage of the rough pig slurry. Evidence from the present study suggests that mechanical separation of pig slurry has the potential to increase up to 25% the emission of CO2-equivalents to the atmosphere during the storage of the separated fractions if compared with the rough slurry.


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