Transformation of nitrogen and production of nitrous oxide in an estuary receiving treated wastewater

硝基化合物的转变和N-D22-D2 O的生产在一个住宅区和福冈的Tatara住宅区进行了调查，从两个废水处理厂接收负荷。在此研究中发现的内容如下：1）从废物处理植物中加载到该住宅区带来的严重影响;2） Nitrous oxide Originated from treated wastewater and sedments;3） The Major production sites of N-D22-D2 O in sediments were in the midstream of the Tatara estuary ;（4）净化是低温度季节N-D22-D2 O的可能来源;（5）观察站水中的N-D22-D2 O的最高集中度，覆盖范围从1.8微米到20.9微米不等; 6） Nitrous oxides has been oversaturated in the water bodies and sediments and its flux to the atmosphere is about 1.07 MmolNkm D1-2 y D1-1 y D1 in this estuary ; 7） The emission rate of N-D22-D2O to the atmosphere is as same order of magnitude as its net production rate in the estuary ;8） The temporal increases in production rate of N-D22-D2O were found in the denitriification process following the onset of anaerobic conditions ; 9）当文化中的温度发生变化时，N-E-D22-E-D2 O在生产率中的温度上升。

Transformation of nitrogen compounds and the production of NィイD22ィエD2O were investigated in an estuary, the Tatara estuary in Fukuoka, receiving the load from two wastewater treatment plant. Conclusions obtained in this study are as follows :1) Loading from the wastewater treatment plants to the estuary brings severe impacts through the production of NィイD22ィエD2O ;2) Nitrous oxide originated from treated wastewater and sediments ;3) The major production sites of NィイD22ィエD2O in sediments were in the midstream of the Tatara estuary ;4) Nitrification is a possible source of NィイD22ィエD2O especially in low temperature season ;5) The highest concentrations of NィイD22ィエD2O in water bodies at the observation stations raged from 1.8 to 20.9μM ;6) Nitrous oxides has been oversaturated in the water bodies and sediments and its flux to the atmosphere is about 1.07 MmolNkmィイD1-2ィエD1yィイD1-1ィエD1 in this estuary ;7) The emission rate of NィイD22ィエD2O to the atmosphere is as same order of magnitude as its net production rate in the estuary ;8) The temporal increases in production rate of NィイD22ィエD2O were found in the denitrification process following the onset of anaerobic conditions ;9) When temperatures in the culture was shifted up, the temporal increase of NィイD22ィエD2O in production rates were found.