title: [Impact of nitrate continuous injection on N2O releases from bioreactor landfill].
abstract: A combined process comprised of ex-situ nitrification and in-situ denitrification in different bioreactors is an effective measure to nitrogen removal, but it will cause N2O, a strong greenhouse gas, emissions. This paper focused on the production characteristics and influencing factors of N2O by establishing 3 bioreactor landfill units by continuous injected different amount of nitrate leachate (50, 100 and 300 mg x L(-1)), with fresh MSW as material in an experimental scale. Experimental results showed that the production of N2O had the same regulation with different amount of NO3(-) -N injection,they all showed high at the initial period,then at a lower level, finnal at a higher level; The cumulative production is positively correlated with the amount of NO3(-) -N, the total quantity of N2O are 36 481, 44 241 and 86 264 μg respectively; However, the amount of N2O by consumption per nitrate nitrogen and N2O conversion ratio by denitrification is negatively correlation with the amount of NO3(-) -N, the average conversion ratio are 8.84 per thousand, 5.68 per thousand, 2.34 per thousand respectively; Shortage of carbon source for denitrification is the main reason for the high N2O production in each reactor in the later period.
authors: Rong-Xing
authors: RX
authors: Bian
authors: Ying-Jie
authors: YJ
authors: Sun
authors: Jing-Jing
authors: JJ
authors: Li
authors: Huan-Huan
authors: HH
authors: Zhang
mesh_terms: D019149:Bioreactors; D058440:Denitrification; D009566:Nitrates / Q000737:chemistry*; D058465:Nitrification; D009584:Nitrogen / Q000737:chemistry; D009609:Nitrous Oxide / Q000032:analysis*; D064091:Waste Disposal Facilities
chemical_list: D009566:Nitrates; D009609:Nitrous Oxide; D009584:Nitrogen