The development of simultaneous partial nitrification, ANAMMOX and denitrification (SNAD) process in a single reactor for nitrogen removal
The development of simultaneous partial nitrification, ANAMMOX and denitrification (SNAD) process in a single reactor for nitrogen removal
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DOI：
10.1016/j.biortech.2008.09.003
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发表时间：
2009-02-01
影响因子：
11.4
通讯作者：
Wang, Tao
中科院分区：
文献类型：
--
作者：
Chen, Huihui;Liu, Sitong;Wang, Tao
在单个限氧无纺布旋转生物接触器（NRBC）反应器中，验证了部分硝化、厌氧氨氧化和反硝化（SNAD）同时处理废水中氨和COD的可行性。在氮和COD负荷分别为0.69 kg N/m(3) d和0.34 kg/m(3) d的条件下，氨转化率为79%，TN去除率为70%，COD去除率为94%。扫描电镜（SEM）观察和荧光原位杂交（FISH）分析显示优势菌群的存在。结果表明，好氧氨氧化菌（AOB）和少量好氧异养菌主要分布在生物膜的好氧外层。然而，在SNAD生物膜的厌氧内部存在ANAMMOX细菌和反硝化细菌，并具有活性。这些细菌在NRBC系统中处于动态平衡状态，可以同时去除氮和COD。(C) 2008 Elsevier Ltd版权所有。
The simultaneous partial nitrification, ANAMMOX and denitrification (SNAD) process was validated to potentially remove ammonium and COD from wastewater in a single, oxygen-limited, non-woven rotating biological contactor (NRBC) reactor. An ammonium conversion efficiency of 79%, TN removal efficiency of 70% and COD removal efficiency of 94% were obtained with the nitrogen and COD loading rate of 0.69 kg N/m(3) d and 0.34 kg/m(3) d, respectively. Scanning electron microscopy (SEM) observation and fluorescence in situ hybridizations (FISH) analysis revealed the existence of the dominant groups of bacteria. As a result, the aerobic ammonia-oxidizing bacteria (AOB), with a spot of aerobic heterotrophic bacteria were mainly distributed in the aerobic outer part of the biofilm. However, ANAMMOX bacteria with denitrifying bacteria were present and active in the anaerobic inner part of the SNAD biofilm. These bacteria were found to exist in a dynamic equilibrium to achieve Simultaneous nitrogen and COD removal in NRBC system. (C) 2008 Elsevier Ltd. All rights reserved.