Alcaligenes faecalisの従属栄養性硝化・脱窒特性とN_2O抑制型高度窒素除去プロセスへの適用の評価

概要

論文の詳細を見る
Batch Experiments were made in pure cultures of Alcaligenes faecalis under aerobic conditions. NH4-N, NO3-N and their mixture (NH4-N/NO3-N) were used as the nitrogen sources to test the heterotrophic nitrification and aerobic denitrification functions of A. faecalis. Two carbon (TOC) to total nitrogen ratios (C:N), 5.22:1 and 1:1 were kept and nitrite shock was made to test their influence on the nitrification and denitrification functions of A. faecalis and on N2O emission. Experimental results showed that: A. faecalis could conduct both nitrification and denitrification. However, the nitrifying and denitrifying rates were strongly influenced by the conditions like the nitrogen sources and the C:N ratio. In the case with NH4-N as the nitrogen source and the C:N ratio of 5.22:1, the nitrifying rate could be 4.49mgNH4-N·hr1, while in the case with NH4-N/NO3-N as the nitrogen source and the C:N ratio of 5.22:1, it could be 2.78mgNH4-N·hr1. On the other hand, In the case with NO3-N as the nitrogen source and the C:N ratio of 5.22:1, the denitrifying rate was 0.67mg NO3-N·hr1. N2O emission generation was strongly influenced by the growth status and activity of A. faecalis. The stationary status and low activity led to higher N2O emission. Among the three nitrogen sources, mixture of NH4-N and NO3-N led to most N2O emission, and NH4-N led to the least N2O generation. Therefore, to completely conduct nitrification and avoid the mixing of NH4-N and NO3-N will of use to control N2O emission. A. faecalis could use NO2-N in its nitrification process. However, the accumulation of NO2-N led to serious N2O generation, especially in the case with higher C:N ratio. To avoid NO2-N accumulation is therefore of importance for reducing N2O production.
社団法人　日本水環境学会の論文
1999-11-10

Alcaligenes faecalisの従属栄養性硝化・脱窒特性とN_2O抑制型高度窒素除去プロセスへの適用の評価

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

Alcaligenes faecalisの従属栄養性硝化 ・脱窒特性とN_2O抑制型高度窒素除去プロセスへの適用の評価

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

Alcaligenes faecalisの従属栄養性硝化・脱窒特性とN_2O抑制型高度窒素除去プロセスへの適用の評価