中文摘要：

以浸没式膜生物反应器（SMBR）启动OLAND工艺,并对OLAND脱氮工艺性能进行了系统的研究。在OLAND-SMBR工艺运行过程中,采用厌氧氨氧化（ANAMMOX）反应产生的氮气与空气混合曝气的方式,对膜组件进行曝气冲刷以减缓膜污染。实验结果表明,在反应器成功运行70 d过程中,进水总氮负荷最高可达0.4 kg·（m3·d）-1,TN去除率稳定高于81%;当曝气速率从0.025 m3·h-1上升至0.1 m3·h-1（空气泵和循环泵曝气速率均为0.05 m3·h-1）时,膜的使用周期从4 d延长至14 d,生物气＋空气混合曝气方式不仅有效地减缓了膜污染,而且为亚硝化细菌的生长提供了所需的溶解氧。

英文摘要：

In this study, the successful start-up of an oxygen-limited autotrophic nitrifcation-denitrification （OLAND） process was conducted in a submerged membrane bioreactor （SMBR）. Subsequently, the denitrifica- tion performance of the OLAND process was investigated in detail. To avoid signifcant membrane fouling, nitro- gen generated from the anaerobic ammonium oxidation （ANAMMOX） process and air was mixed and utilized as the complete mixing-aeration gas. The results showed that during 70 d of operation of the OLAND-SMBR system, the total nitrogen load could achieve up to 0. 4 kg · （ m3 · d） - 1 , and more than 81% of the total nitrogen remov- al rate was obtained steadily. When the mixing-aeration rate was increased from 0. 025 to 0. 1 m3 · h-1 , the membrane cleaning cycle could be extended from 4 to 14 d, effectively mitigated membrane fouling but also provided the indicating that the mixing-aeration method not only required oxygen source for nitrite bacteria growth.