Emission of N2O and CH4 from a constructed wetland in southeastern Norway.
Emission of N2O and CH4 from a constructed wetland in southeastern Norway.
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DOI：
10.1016/j.scitotenv.2006.10.007
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发表时间：
2007-07
期刊：
影响因子：
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通讯作者：
A. Søvik;Bjørn Kløve
中科院分区：
文献类型：
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作者：
A. Søvik;Bjørn Kløve
Skjønhaug人工湿地（CW）是挪威东南部一个自由地表水（FSW）湿地，用于抛光化学处理的城市污水，由三个池塘以及具有轻质骨料（LWA）的滴流、不饱和过滤器组成。一氧化二氮（N2 O）和甲烷（CH 4）的通量已被测量在秋季，冬季和夏季从所有三个池塘，以及从不饱和过滤器。在同一地点测量了水的物理化学参数。N2 O通量的时间和空间变化较大，范围为−0.49至110 mg N2 O-N m−2day−1，而CH 4通量的范围为−1.2至1900 mg m−2day−1。因此，排放和消耗都发生了。关于N2 O通量有一个显着的差异，夏季，冬季和秋季，最高的排放量发生在秋季。CH 4的通量，另一方面，没有显着不同的季节。N2 O和CH 4的排放量均受总有机碳（TOC）的影响。N_2O和CH_4的排放通量与其它处理废水的CWs的排放通量基本一致。N2 O和CH 4对全球升温潜能值的贡献大致相等。
The Skjønhaug constructed wetland (CW) is a free surface water (FSW) wetland polishing chemically treated municipal wastewater in southeastern Norway and consists of three ponds as well as trickling, unsaturated filters with light weight aggregates (LWA). Fluxes of nitrous oxide (N2O) and methane (CH4) have been measured during the autumn, winter and summer from all three ponds as well as from the unsaturated filters. Physicochemical parameters of the water have been measured at the same localities. The large temporal and spatial variation of N2O fluxes was found to cover a range of −0.49 to 110 mg N2O–N m−2day−1, while the fluxes of CH4was found to cover a range of −1.2 to 1900 mg m−2day−1. Thus, both emission and consumption occurred. Regarding fluxes of N2O there was a significant difference between the summer, winter and autumn, with the highest emissions occurring during the autumn. The fluxes of CH4were, on the other hand, not significantly different with regard to seasons. Both the emissions of N2O and CH4were positively influenced by the amount of total organic carbon (TOC). The measured fluxes of N2O and CH4are in the same range as those reported from other CWs treating wastewater. There was an approximately equal contribution to the global warming potential from N2O and CH4.