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Estimate of Nitrous Oxide Emission Factors from Municipal Wastewater Treatment Plants  

Yang, Hyung-Jae (Environmental Cap System Research Department, National Institute of Environmental Research)
Park, Jung-Min (Environmental Cap System Research Department, National Institute of Environmental Research)
Kim, Min-Jung (Environmental Cap System Research Department, National Institute of Environmental Research)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.12, 2008 , pp. 1281-1286 More about this Journal
Abstract
Nitrous oxide(N$_2$O) is well known as a greenhouse gas that contributes to the global warming (310 times more per molecule than carbon dioxide) and to the destruction of the ozone layer. The objective of this study is to estimate N$_2$O emission factor using an emission isolation flux chamber from municipal wastewater treatment plants. N$_2$O gas was analysed by GC/ECD with 6 port gas sampling valve. The results of this study were as follows. N$_2$O emission factor of 5-Stage process from Y wastewater treatment plants was lowest as 0.94 g-N$_2$O/kg-TN. And that of other processes were 2.65 g-N$_2$O/kg-TN for Activated sludge process, 9.30 g-N$_2$O/kg-TN for Denipho process, and 26.73 g-N$_2$O/kg-TN for Sequencing Batch Reactor process. We have known that 5-Stage process is most appropriate process to reduce greenhouse for municipal wastewater treatment plants.
Keywords
Wastewater Treatment; N$_2$O; Emission Factor;
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