Pathway governing nitrogen removal in artificially aerated constructed wetlands: Impact of aeration mode and influent chemical oxygen demand to nitrogen ratios

被引：45
作者：
Hou, Jie [1 ,2 ]
Wang, Xin [1 ]
Wang, Jie [1 ]
Xia, Ling [3 ]
Zhang, Yiqing [1 ]
Li, Dapeng [1 ,2 ]
Ma, Xufa [1 ,2 ]
机构：
[1] Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Hubei, Peoples R China
[2] Freshwater Aquaculture Collaborat Innovat Ctr Hub, Wuhan 430070, Hubei, Peoples R China
[3] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 257卷
基金：
中国国家自然科学基金;
关键词：
Constructed wetlands; Biological nitrogen removal; Anammox; Influent COD/N; Intermittent aeration; PARTIAL NITRIFICATION; WASTE-WATER; DISSOLVED-OXYGEN; ANAMMOX PROCESS; COD/N RATIOS; DENITRIFICATION; SLUDGE; COMMUNITY; BACTERIA; NITRITATION/ANAMMOX;
D O I：
10.1016/j.biortech.2018.02.042
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study aimed at assessing the influence of aeration mode and influent COD/N ratio on nitrogen removal in constructed wetlands (CWs). The results showed that a simultaneous partial nitrification, anammox and denitrification (SNAD) process was established in the intermittent aerated V1. While nitrogen removal pathway gradually changed from partial nitrification-denitrification to complete nitrification-denitrification along with reducing COD/N ratio in the continuous limited aerated V2. Effective inhibition of NOBs under intermittent aeration conditions, good retention of anammox bacteria biomass and much faster depletion of COD prior to substantial NH4+-N conversion jointly led to the successful achievement of stable SNDA process with elevated influent COD/N ratios in V1. Furthermore, the presence of SNAD ensured a robust ammonium (84-92%) and TN (80-91%) removal efficiency in V1 under varying COD loading rates. In contrast, the TN removal efficiency decreased rapidly along with the reducing influent COD/N ratios in V2.
引用
收藏
页码：137 / 146
页数：10
相关论文
共 35 条
[1]   Sustainable nitrogen elimination biotechnologies: A review [J].
Ahn, Young-Ho .
PROCESS BIOCHEMISTRY, 2006, 41 (08) :1709-1721
[2]   DENITRIFICATION IN ANAEROBIC DIGESTERS - POSSIBILITIES AND INFLUENCE OF WASTE-WATER COD/N-NOX RATIO [J].
AKUNNA, JC ;
BIZEAU, C ;
MOLETTA, R .
ENVIRONMENTAL TECHNOLOGY, 1992, 13 (09) :825-836
[3]  
[Anonymous], 2013, Nat. Educ. Knowl
[4]   Occurrence and activity of anammox bacteria in surface sediments of the southern North Sea [J].
Bale, Nicole J. ;
Villanueva, Laura ;
Fan, Haoxin ;
Stal, Lucas J. ;
Hopmans, Ellen C. ;
Schouten, Stefan ;
Damste, Jaap S. Sinninghe .
FEMS MICROBIOLOGY ECOLOGY, 2014, 89 (01) :99-110
[5]   Inactivation of ANAMMOX communities under concurrent operation of anaerobic ammonium oxidation (ANAMMOX) and denitrification [J].
Chamchoi, N. ;
Nitisoravut, S. ;
Schmidt, J. E. .
BIORESOURCE TECHNOLOGY, 2008, 99 (09) :3331-3336
[6]   Nitrogen transforming community in a horizontal subsurface-flow constructed wetland [J].
Coban, Oksana ;
Kuschk, Peter ;
Kappelmeyer, Uwe ;
Spott, Oliver ;
Martienssen, Marion ;
Jetten, Mike S. M. ;
Knoeller, Kay .
WATER RESEARCH, 2015, 74 :203-212
[7]   DETECTION AND COUNTING OF NITROBACTER POPULATIONS IN SOIL BY PCR [J].
DEGRANGE, V ;
BARDIN, R .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1995, 61 (06) :2093-2098
[8]   Nitrogen removal in intermittently aerated vertical flow constructed wetlands: Impact of influent COD/N ratios [J].
Fan, Jinlin ;
Wang, Wengang ;
Zhang, Bo ;
Guo, Yeye ;
Ngo, Huu Hao ;
Guo, Wenshan ;
Zhang, Jian ;
Wu, Haiming .
BIORESOURCE TECHNOLOGY, 2013, 143 :461-466
[9]  
Federation W.E. Association A.P.H., 2005, STANDARD METHODS EXA
[10]   Complete nitrogen removal from municipal wastewater via partial nitrification by appropriately alternating anoxic/aerobic conditions in a continuous plug-flow step feed process [J].
Ge, Shijian ;
Peng, Yongzhen ;
Qiu, Shuang ;
Zhu, Ao ;
Ren, Nanqi .
WATER RESEARCH, 2014, 55 :95-105
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