Abstract
Composted organic wastes have been shown to reduce emissions of N2O and CH4, but little is known about the release of these gases during the composting process. This research examined the emissions of N2O and CH4 during the composting of liquid swine manure and wheat straw at two operations, one with forced aeration and the other without. The lack of aeration increased CH4 emissions to 24 times that of composting with aeration, but had no significant effect on N2O production. When total N2O and CH4 emissions from composting were compared with liquid swine manure emissions, aerated composting was found to reduce emissions to as low as 30% of those from liquid manure storage, while non-aerated composting elevated emissions up to an estimated 330% of liquid manure storage.
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Thompson, A.G., Wagner-Riddle, C. & Fleming, R. Emissions of N2O and CH4 during the Composting of Liquid Swine Manure. Environ Monit Assess 91, 87–104 (2004). https://doi.org/10.1023/B:EMAS.0000009231.04123.2d
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DOI: https://doi.org/10.1023/B:EMAS.0000009231.04123.2d