title: Emission of greenhouse gases from controlled incineration of cattle manure.
abstract: Greenhouse gas emission is a potential limiting factor in livestock farming development. While incineration is one approach to minimize livestock manure, there are concerns about significant levels of nitrogen and organic compounds in manure as potential sources of greenhouse gas emissions (N2O and CH4). In this study, the effects of various incineration conditions, such as the furnace temperature and air ratio on N2O and CH4 formation behaviour, of cattle manure (as a representative livestock manure) were investigated in a pilot rotary kiln furnace. The results revealed that N2O emissions decreased with increasing temperature and decreasing air ratio. In addition, CH4 emissions tended to be high above 800 degrees C at a low air ratio. The emission factors for N2O and CH4 under the general conditions (combustion temperature of 800-850 degrees C and air ratio of 1.4) were determined to be 1.9-6.0% g-N2O-N/g-N and 0.0046-0.26% g-CH4/g-burning object, respectively. The emission factor for CH4 differed slightly from the published values between 0.16 and 0.38% g-CH4/g-burning object. However, the emission factor for N2O was much higher than the currently accepted value of 0.7% g-N2O-N/g-N and, therefore, it is necessary to revise the N2O emission factor for the incineration of livestock manure.
authors.affiliation: Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Japan. oshita.kazuyuki.6e@kyoto-u.ac.jp
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Oshita
authors.forename: Xiucui
authors.initials: X
authors.lastname: Sun
authors.forename: Miki
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Masaki
authors.initials: M
authors.lastname: Takaoka
authors.forename: Kazutsugu
authors.initials: K
authors.lastname: Matsukawa
authors.forename: Taku
authors.initials: T
authors.lastname: Fujiwara
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D000818:Animals; D002417:Cattle; D005740:Gases; D017752:Greenhouse Effect; D017745:Incineration / Q000379:methods*; D008372:Manure; D008697:Methane / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000393:Air Pollutants; D005740:Gases; D008372:Manure; D009609:Nitrous Oxide; D008697:Methane