生物氮气/空气混合曝气OLAND-SMBR工艺脱氮  

Nitrogen removal of OLAND-SMBR process by using biogas mixed with air aeration

作　　者：傅玲子 杨凤林[1] 徐晓晨[1] 王超[1] 李子音[1] 许新迪 

机构地区：[1]大连理工大学环境学院工业生态与环境工程教育部重点实验室,大连116024

出　　处：《环境工程学报》2016年第9期4789-4795,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21177019);国家水体污染控制与治理科技重大专项(2013ZX07202-010-01)

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。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.

关 键 词：OLAND 膜生物反应器 混合曝气 膜污染 

分 类 号：X703[环境科学与工程—环境工程]