Macroscale and microscale analysis of Anammox in anaerobic rotating biological contactor

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• 作者：Yongtao Lv^a ; Lei Wang^a ;   ; ^{wl0178@126.com} ; Xudong Wang^a ; Yongzhe Yang^a ; Zhiying Wang^a ;   ; ^{hybos2000@126.com} ; Jie Li^b
• 关键词：Anammox ; AnRBC ; feed mode ; microelectrodes
• 刊名：Journal of Environmental Sciences
• 出版年：2011
• 出版时间：October 2011
• 年：2011
• 卷：23
• 期：10
• 页码：1679-1683
• 全文大小：428 K

文摘

Inoculated with conventional anaerobic activated sludge, the Anammox process was successfully developed in an anaerobic rotating biological contactor (AnRBC) fed with a low ratio of C/N synthetic wastewater. Operated in a single point feed mode, the AnRBC removed 92.1 % in - 126) of the influent N at the highest surface load of 12 g/(m²-day). The biomass increased by 25 % and 17.1 g/(m²-day) of maximum N removal surface load was achieved by elevating flow rate with another feed point. Fluorescence in situ hybridization and polymerase chain reaction analysis indicated that the Anammox genus Candidatus Kuenenia stuttgartiensis dominated the community. Both Anammox and denitrifying activity were detected in biofilm by the application of microelectrodes. In the outer layer of the biofilm (0-2500 ¦Ìm), nitrite and ammonium consumed simultaneously in a ratio of 1.12/1, revealing the occurrence of Anammox. In the inner layer (> 2500 ¦Ìm), a decrease of nitrate was caused by denitrification in the absence of nitrite and ammonium.