[短程硝化反硝化及同步硝化反硝化生物脱氮系统中的N2O排放与控制]

[N2O emission and control in shortcut nitrification and denitrification and simultaneous nitrification and denitrification biological nitrogen removal systems].

作者信息

Zhang Jing-rong, Wang Shu-ying, Shang Hui-lai, Peng Yong-zhen

机构信息

Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.

出版信息

Huan Jing Ke Xue. 2009 Dec;30(12):3624-9.

PMID:20187398

Abstract

SBR reactors were used to investigate the N2O emission in shortcut nitrification and simultaneous nitrification and denitrification (SND). Shortcut nitrification with nitrosation rate above 90% was realized by real-time control strategy. The N2O emission and variation of nitrosation rate were investigated under 4 DO levels (0.5, 1.0, 1.5, 2.0 mg/L). The results turned out that the optimal DO to maintain high nitrosation rate and minimum N2O emission was 1.5 mg/L and the N4O emission was 0.06 g per ammonium removed. The SBR filled with carbon fiber performed under low DO and pulse feeding. The SND rate was over 79% during the experiment. The N2O emission was studied under DO 0.2, 0.4, 1.0 and 1.5 mg/L. It turned out that the optimal DO was 1.0 mg/L and the N2O emission was 0.021 g per ammonium removed. Compared to the shortcut nitrification, the N2O emission of SND was 1/3 of the short-cut nitrification under optimal DO.

摘要

采用序批式反应器（SBR）研究短程硝化及同时硝化反硝化（SND）过程中的N2O排放情况。通过实时控制策略实现了亚硝化率高于90%的短程硝化。研究了4种溶解氧（DO）水平（0.5、1.0、1.5、2.0mg/L）下的N2O排放及亚硝化率变化。结果表明，维持高亚硝化率和最低N2O排放的最佳溶解氧为1.5mg/L，每去除1份铵的N2O排放量为0.06g。填充碳纤维的SBR在低溶解氧和脉冲进料条件下运行。实验期间的同时硝化反硝化率超过79%。研究了溶解氧为0.2、0.4、1.0和1.5mg/L时的N2O排放情况。结果表明，最佳溶解氧为1.0mg/L，每去除1份铵的N2O排放量为0.021g。与短程硝化相比，在最佳溶解氧条件下，同时硝化反硝化的N2O排放量是短程硝化的1/3。