环境工程学报2011，Vol.5Issue(12)：2658-2662,5.
曝气强度对同时硝化反硝化（SND）脱氮过程中N2O排放的影响
Effect of aeration strength on nitrous oxide emission during simultaneous nitrification and denitrification
摘要
Abstract
For the purpose of controlling nitrous oxide （N2O） emission from wastewater treatment systems, the N2O emission under different aeration rates from a simultaneous nitrification and denitrification system were characterized. PCR-DGGE method was applied to characterize microbial communities in the system. Results showed that nitrogen removal efficiency of the system decreased as the increase of aeration rates, but the ratio of N2O to the total N removal increased. Three aeration rates were applied. From low to high aeration rate, nitrogen removal efficieneies were 80.01% , 65.28% and 58.62% , respectively. The amount of N：O emitted accounted for 1.89% , 7.84% and 9.20% of total N removal. PCR-DGGE analysis showed that microbial communities un- der low aeration rate were significantly different from those under medium and high aeration rates, but the com- munities under medium and high aeration rates were not significantly different. These data suggested that varia- tion ofN2O emission under different aeration rates was controlled by different microbial communities. Optimizing the aeration rates would lead to control of N2O emission from wastewater treatment systems.关键词
好氧硝化/曝气强度/N2O排放/微生物群落Key words
nitrification/aeration phase/N2O emission/microbial community分类
资源环境引用本文复制引用
朴哲,陈新兵,赵秀锦,刘艳萍,康贻军,何成达,殷士学..曝气强度对同时硝化反硝化（SND）脱氮过程中N2O排放的影响[J].环境工程学报,2011,5(12):2658-2662,5.基金项目
基金项目：国家自然科学基金资助项目 （）
国家水体污染控制与治理科技重大专项 （）
