title: Effect of C/N ratio on nitrous oxide emission from swine wastewater treatment process.
abstract: To evaluate control parameters for nitrous oxide (N2O) emissions in the swine wastewater treatment process, the N2O emission was compared in the activated sludge from SBRs acclimated in different carbon/nitrogen (C/N) ratios. N2O emission from a denitrification phase was very strongly dependent on C/N ratio of swine wastewater, and the total N2O emission in the operating condition of BOD5/TN ratio of 2.6 was approximately 270 times greater than that in BOD5/TN ratio of 4.5. However, the effect of C/N ratio on N2O emission amount from nitrification was not significant in an oxic phase study. It is considered that stabilization of the C/N ratio through optimal solid-liquid separation of slurry or use of an external carbon source is indispensable for effective N2O emission control from nitrogen removal process of swine wastewater.
authors.affiliation: Department of Environmental Resources Engineering, Waseda University, 3-4-1 Ohkubo, Shinjyuku-ku, Tokyo 1698555, Japan. naohiro0630@toki.waseda.jp
authors.forename: N
authors.initials: N
authors.lastname: Kishida
authors.forename: J H
authors.initials: JH
authors.lastname: Kim
authors.forename: Y
authors.initials: Y
authors.lastname: Kimochi
authors.forename: O
authors.initials: O
authors.lastname: Nishimura
authors.forename: H
authors.initials: H
authors.lastname: Sasaki
authors.forename: R
authors.initials: R
authors.lastname: Sudo
mesh_terms: D000818:Animals; D002244:Carbon / Q000032:analysis*; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis* / Q000378:metabolism*; D009609:Nitrous Oxide / Q000032:analysis*; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D002244:Carbon; D009609:Nitrous Oxide; D009584:Nitrogen