【摘要】 采用菖蒲型表面流人工湿地和复合型生态浮床净化模拟污水厂尾水,以探究在不同季节、不同进水氮形态下两者的脱氮性能差异;并结合高通量测序技术分析微生物组成,以考察两系统内微生物群落结构特征及功能特征。研究结果显示:植物和水温对系统TN的去除具有显著影响,在夏季表面流人工湿地组和复合型生态浮床组的处理效果明显优于春、秋季,在系统水力停留时间为3 d、水温为（34±2）℃的条件下,两者对TN的去除率分别达到（84. 97±3. 90）%和（82. 23±4. 83）%;进水氮形态对系统的运行效果有显著影响,当水温为（25±2）℃时,进水中ρ（NH+4-N）/ρ（NO₃^--N）=1∶1时,系统对TN的去除负荷达到最大,湿地组为1333 mg/（m²·d）,浮床组为923 mg/（m²·d）,适当提高进水中氨氮的比例有利于植物生态系统中总氮的去除。菌群分类结果表明,两种处理系统均具有很高的细菌多样性,相较于浮床组,湿地组的反硝化菌相对丰度更高,表现出更强的脱氮性能。更多还原

【Abstract】 Iris surface flow constructed wetland（ SFCW） and integrated ecological floating-bed（ IEFB） were used to purify the simulated effluent from wastewater treatment plants,aiming to compare nitrogen removal performance differences between these two kinds of ecological technologies in different seasons and under different influent nitrogen forms. High-throughput sequencing technology was also used for analyzing the microbial community composition,in order to investigate the bacterial community structures and functional characteristics of the two systems. Results showed that: plant and water temperature had significant influence on TN removal: both SFCW and IEFB had better treatment performance in summer than that in spring and autumn,when HRT was 3 days and water temperature was（ 34±2） ℃,the removal rate of TN reached（ 84. 97±3. 90） % and（ 82. 23± 4. 83） % in SFCW and FTW,respectively; influent nitrogen forms also greatly affected two systems,treatment performance: under the influent conditions of water temperature of（ 25±2） ℃,ρ（ NH₄⁺-N） to ρ（ NO₃^--N） = 1,the removal capability of TN in the system reached the maximum value,respectively,1333 mg/（ m²·d） in SFCW system and 923 mg/（ m²·d） in IEFB system,indicating that the appropriate increase in proportion of NH₄⁺-N in the influent was favorable to TN removal in plant ecosystem. Taxonomic analysis showed that each treatment system had very high bacterial diversity,and compared with IEFB,SFCW had higher relative abundance of denitrifying bacteria and showed a stronger nitrogen removal performance.更多还原