著者

長谷川 聖 花木 啓祐 松尾 友矩

出版者

Japan Society of Civil Engineers

雑誌

環境工学研究論文集 (ISSN:13415115)

巻号頁・発行日

vol.36, pp.465-476, 1999-11-15 (Released:2010-03-17)

参考文献数

18

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To demonstrate the efficiency of sulfur as denitrification electron donor, the column and the batch experiments were carried out. Nitrate-nitrogen was sufficiently removed by the soil column packed with elemental sulfur. When denitrification proceeded insufficiently, the high concentration of N2O was detected. On the other hand, when denitrification proceeded sufficiently, N2O formation was kept low. The batch experiments indicated that high water content and CaCO3 addition for pH adjustment are effective methods to proceed denitrification sufficiently and decrease N2O emission. In the case of adding each electron donor (S0, FeS, glucose, or cellulose), produced N2O was more readily reduced than the case of soil alone. When inorganic sulfur was used as electron donor, the maximum concentration of produced N2O in the gas phase was very low (about 50 ppm), which was 2 order lower than the concentration in the case that organic compounds were used as electron donor. This indicated the possibility to suppress N2O emission by adding sulfur into the soil and proceeding sulfur denitrification.