https://scholars.lib.ntu.edu.tw/handle/123456789/407956
標題: | Influence of hydraulic retention time on partial nitrification of continuous-flow aerobic granular-sludge reactor | 作者: | Wan C. Yang X. Lee D.-J. Sun S. Liu X. Zhang P. |
關鍵字: | Aerobic granules;Clone library;Continuous-flow;Hydraulic retention time;Partial nitrification | 公開日期: | 2014 | 卷: | 35 | 期: | 14 | 起(迄)頁: | 1760-1765 | 來源出版物: | Environmental Technology (United Kingdom) | 摘要: | This study investigated the effects of hydraulic retention time (HRT) at 12 h, 7.2 h and 2.4 h on partial nitrification efficiency of continuous-flow aerobic granular reactors (CFAGRs) with mature aerobic granules (500¡Ó20 mg l-1). At HRT 12 h and 7.2 h, the removal efficiency of both ammonia-nitrogen (NH+ 4-N) and nitrite accumulation rate were exceeding 90%. At HRT 2.4 h, NH+ 4-N removal efficiency was reduced but most of the conversion efficiency to nitrite was only slightly reduced. At HRT<2.4 h, washout of aerobic granules occurred. In all tests conducted herein, the chemical oxygen demand removal efficiencies exceeded 90%. The clone library results noted the presence of ammonia-oxidizing bacteria belonged to £] -Proteobacteria subclass, including 94% of Nitrosomonas europaea and 6% of Nitrosomonas sp. The polymerase chain reaction and denaturing gradient gel electrophoresis results suggested that Alpha proteobacterium, Pseudoxanthomonas mexicana strain, Sphaerotilus natans and Uncultured gamma proteobacterium were responsible for the aerobic granular stability and processing performance. The present CFAGR successfully implemented continuous partial nitrification using aerobic granules at low HRT. ? 2014 Taylor & Francis. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407956 | ISSN: | 09593330 | DOI: | 10.1080/09593330.2014.881423 |
顯示於: | 化學工程學系 |
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