曝气量对短程硝化过程中N2O产量的影响

黄楠; 赵剑强; 葛光环; 贾璐维

doi:10.12030/j.cjee.201508173

环境工程学报

曝气量对短程硝化过程中N2O产量的影响

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黄楠, 赵剑强, 葛光环, 贾璐维. 曝气量对短程硝化过程中N2O产量的影响[J]. 环境工程学报, 2017, 11(1): 174-180. doi: 10.12030/j.cjee.201508173

引用本文:

黄楠, 赵剑强, 葛光环, 贾璐维. 曝气量对短程硝化过程中N2O产量的影响[J]. 环境工程学报, 2017, 11(1): 174-180. doi: 10.12030/j.cjee.201508173

HUANG Nan, ZHAO Jianqiang, GE Guanghuan, JIA Luwei. Effect of aeration rates on N2O emission during nitritation process[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 174-180. doi: 10.12030/j.cjee.201508173

Citation:

HUANG Nan, ZHAO Jianqiang, GE Guanghuan, JIA Luwei. Effect of aeration rates on N2O emission during nitritation process[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 174-180. doi: 10.12030/j.cjee.201508173

曝气量对短程硝化过程中N2O产量的影响

1.
长安大学环境科学与工程学院, 西安, 710064
基金项目:
中央高校基本科研业务费专项（2013G3292017，310829165020）

陕西省科技计划项目（2014K15-03-02）
中图分类号: X703

Effect of aeration rates on N2O emission during nitritation process

1.
School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, China
Fund Project:

摘要: 采用敞开式SBR，分别研究曝气量为20、40、60和80 L·h-1工况下，短程硝化过程中溶解态N2O的逸出规律及N2O总产量。研究结果表明：曝气过程中溶解态N2O释放速率与曝气量及溶解态N2O浓度正相关，随着曝气量的增大，N2O释放速率-溶解态N2O浓度变化系数分别为0.001 5、0.002 4、0.003 5和0.004 3 s-1；在各种曝气量下的亚硝化过程中，溶解态N2O浓度呈先增加后减少现象变化；短程硝化反应时间随曝气量的增长而明显缩短；在亚硝化反应过程中溶解态N2O最大值及N2O总产量随着曝气量的增大而明显减小；曝气量由低到高，亚硝化率逐步降低，分别为99.6%、94.9%、92.2%和85.5%，N2O总产量分别为21.3、9.4、6.8和3.7 mg·L-1。低曝气量（20 L·h-1）下，N2O的产量远高于高曝气量（80 L·h-1）下的产量。中等强度曝气量（40 L·h-1、60 L·h-1）下，亚硝化过程既可以维持较高的亚硝化率，又可以有效地减少N2O总产量。
- 曝气量 /
- 氧化亚氮 /
- 短程硝化 /
- 释放速率
Abstract: The effect of aeration rates (20, 40, 60, and 80 L·h-1) on the emission rate of dissolved N2O, as well as the corresponding emission and production rates of N2O in the nitritation process, were investigated using sequencing batch reactor tests in an open space. The results showed that the emission rate of dissolved N2O was positively correlated with the aeration rate and the dissolved N2O concentration. When the aeration rate increased, the variation factors of the N2O release rate were 0.001 5, 0.002 4, 0.003 5, and 0.004 3 s-1, respectively. It was also found that the concentration of dissolved N2O increased initially, and then decreased during the nitritation process under all four aeration rates. The N2O production decreased as the aeration rate increased. As the aeration rate increased, the ammonia oxidation rates were 99.6%, 94.9%, 92.2%, and 85.5%, respectively, and the corresponding N2O production rates were 21.3, 9.4, 6.8, and 3.7 mg·L-1. The total emission amount of N2O under 20 L·h-1 was much higher than it was under 80 L·h-1. Moreover, the moderate aeration rates (40 L·h-1 and 60 L·h-1) maintained efficient ammonia oxidation rates as well as acceptable N2O emission.
- aeration rate /
- nitrous oxide /
- nitritation process /
- emission rate

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黄楠, 赵剑强, 葛光环, 贾璐维. 曝气量对短程硝化过程中N2O产量的影响[J]. 环境工程学报, 2017, 11(1): 174-180. doi: 10.12030/j.cjee.201508173

引用本文:

黄楠, 赵剑强, 葛光环, 贾璐维. 曝气量对短程硝化过程中N2O产量的影响[J]. 环境工程学报, 2017, 11(1): 174-180. doi: 10.12030/j.cjee.201508173

Citation:

曝气量对短程硝化过程中N2O产量的影响

1. 长安大学环境科学与工程学院, 西安, 710064

收稿日期: 2016-01-06

基金项目:

中央高校基本科研业务费专项（2013G3292017，310829165020）

陕西省科技计划项目（2014K15-03-02）

关键词:

摘要: 采用敞开式SBR，分别研究曝气量为20、40、60和80 L·h-1工况下，短程硝化过程中溶解态N2O的逸出规律及N2O总产量。研究结果表明：曝气过程中溶解态N2O释放速率与曝气量及溶解态N2O浓度正相关，随着曝气量的增大，N2O释放速率-溶解态N2O浓度变化系数分别为0.001 5、0.002 4、0.003 5和0.004 3 s-1；在各种曝气量下的亚硝化过程中，溶解态N2O浓度呈先增加后减少现象变化；短程硝化反应时间随曝气量的增长而明显缩短；在亚硝化反应过程中溶解态N2O最大值及N2O总产量随着曝气量的增大而明显减小；曝气量由低到高，亚硝化率逐步降低，分别为99.6%、94.9%、92.2%和85.5%，N2O总产量分别为21.3、9.4、6.8和3.7 mg·L-1。低曝气量（20 L·h-1）下，N2O的产量远高于高曝气量（80 L·h-1）下的产量。中等强度曝气量（40 L·h-1、60 L·h-1）下，亚硝化过程既可以维持较高的亚硝化率，又可以有效地减少N2O总产量。

English Abstract

Effect of aeration rates on N2O emission during nitritation process

1. School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, China

Received Date: 2016-01-06

Fund Project:

Keywords:

Abstract: The effect of aeration rates (20, 40, 60, and 80 L·h-1) on the emission rate of dissolved N2O, as well as the corresponding emission and production rates of N2O in the nitritation process, were investigated using sequencing batch reactor tests in an open space. The results showed that the emission rate of dissolved N2O was positively correlated with the aeration rate and the dissolved N2O concentration. When the aeration rate increased, the variation factors of the N2O release rate were 0.001 5, 0.002 4, 0.003 5, and 0.004 3 s-1, respectively. It was also found that the concentration of dissolved N2O increased initially, and then decreased during the nitritation process under all four aeration rates. The N2O production decreased as the aeration rate increased. As the aeration rate increased, the ammonia oxidation rates were 99.6%, 94.9%, 92.2%, and 85.5%, respectively, and the corresponding N2O production rates were 21.3, 9.4, 6.8, and 3.7 mg·L-1. The total emission amount of N2O under 20 L·h-1 was much higher than it was under 80 L·h-1. Moreover, the moderate aeration rates (40 L·h-1 and 60 L·h-1) maintained efficient ammonia oxidation rates as well as acceptable N2O emission.

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曝气量对短程硝化过程中N2O产量的影响

Effect of aeration rates on N2O emission during nitritation process

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曝气量对短程硝化过程中N2O产量的影响

English Abstract

Effect of aeration rates on N2O emission during nitritation process

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