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• W1991073180 abstract "The Ganqinfen system – a process of manually cleaning animal feces by means of a shovel – is a widely used manure separating method in Chinese pig farms. Ganqinfen pig feces and chopped corn stalks were mixed at the ratio of 7:1, and composted in 1.5 m3 rotting boxes for 70 d. Evolution of CH4, N2O and NH3 during composting, and the effects of turning and covering, were studied in this research. Results showed that 20–39% and 0.5–4% of total nitrogen were lost in the form of NH3 and N2O respectively, and 0.1–0.9% of initial organic carbon was emitted as CH4. Turning enhanced air exchange in the piles, thus decreasing CH4 emission by 83–93% and shortening the maturing period. When trials were finished, all non-turned piles were separated to three layers by moisture content. This structure caused the N2O losses of non-turning treatments to be 6–12.7 times higher than that of turning treatments. Covering materials reduced air exchange at the surface of the pile, thus decreasing the O2 supply and consequently increasing CH4 production by 33–45%. Covering also reduced NH3 emission by 4–34%. For the composting of Ganqinfen pig feces, we suggest that a program of turning twice weekly without covering will result in compost that is sufficiently matured after 6 wk with the lowest resultant greenhouse gas emission." @default.
• W1991073180 created "2016-06-24" @default.
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• W1991073180 date "2013-01-01" @default.
• W1991073180 modified "2023-10-06" @default.
• W1991073180 title "Gaseous emission during the composting of pig feces from Chinese Ganqinfen system" @default.
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• W1991073180 doi "https://doi.org/10.1016/j.chemosphere.2012.08.056" @default.
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