Contribution of dissolved N_2O in total N_2O emission from sewage treatment plant
Contribution of dissolved N_2O in total N_2O emission from sewage treatment plant
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溶解N_2O对污水处理厂N_2O排放总量的贡献
DOI：
10.1016/j.chemosphere.2018.08.089
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发表时间：
2018
期刊：
影响因子：
8.8
通讯作者：
O.,
中科院分区：
文献类型：
--
作者：
Masuda;S.;Otomo;S.;Chikako;M.;Nishimura;O.,
一氧化二氮，N2O，从污水处理厂，进行脱氮，和河流，接收其出水的特点，进行了调查，在夏季和冬季密集的日常调查。冬季亚硝酸盐在反应池中的积累促进了污水处理厂N2O的产生。冬季出水中溶解态N2O浓度也较高，导致下游河流溶解态N2O浓度升高。相反，N2O的生产内工厂和溶解N2O排放通过污水，溶解N2O排放，控制在夏季时，脱氮更完全，没有亚硝酸盐积累。出水中溶解性N2O在离开工厂后迅速损失，夏季高达26%，冬季高达59%。此外，冬季溶解态N2O排放量与间接排放量基本相当。当脱氮成功进行时，溶解的N2O排放量很小。相反，当脱氮不充分时，溶解N2O排放成为重要的N2O源。
The characteristics of nitrous oxide, N2O, from a sewage treatment plant, which conducts nitrogen removal, and the river that receives its effluent water, were investigated by intensive daily surveys in summer and winter. N2O production in the sewage treatment plant was promoted in winter when nitrite accumulated in the reaction tank. The dissolved N2O concentration in the effluent water was also high in winter, which caused the dissolved N2O concentration to increase in the river downstream. In contrast, the N2O production inside the plant and the dissolved N2O emission through the effluent water, the dissolved N2O discharge, was controlled in summer when the nitrogen removal was more complete and there was no-nitrite accumulation. The dissolved N2O in the effluent water was rapidly lost after leaving the plant by as much as 26% in summer and 59% in winter. Additionally, the amount of the dissolved N2O discharge in winter was almost equal to that of the indirect N2O emission. When the nitrogen removal proceeded successfully, the amount of dissolved N2O discharge was small. In contrast, when the nitrogen removal was insufficient, the dissolved N2O discharge became an important N2O source.