Achieving mainstream nitrogen removal through simultaneous partial nitrification, anammox and denitrification process in an integrated fixed film activated sludge reactor

被引：176
作者：
Wang, Chao [1 ]
Liu, Sitong [2 ]
Xu, Xiaochen [1 ]
Zhang, Chaolei [3 ]
Wang, Dong [1 ]
Yang, Fenglin [1 ]
机构：
[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, Linggong Rd 2, Dalian 116024, Peoples R China
[2] Peking Univ, Dept Environm Engn, Beijing 100871, Peoples R China
[3] Dalian Univ Technol, Sch Life Sci & Biotechnol, Linggong Rd 2, Dalian 116024, Peoples R China
来源：
CHEMOSPHERE | 2018年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Anammox; SNAD; Mainstream; COD/N ratio; Microbial community; MUNICIPAL WASTE-WATER; ROTATING BIOLOGICAL CONTACTOR; PARTIAL NITRITATION/ANAMMOX; MICROBIAL COMMUNITIES; MEMBRANE BIOREACTORS; OXIDIZING BACTERIA; ORGANIC-CARBON; SNAD PROCESS; C/N RATIO; START-UP;
D O I：
10.1016/j.chemosphere.2018.04.016
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The anaerobic ammonium oxidation (anammox) is becoming a critical technology for energy neutral in mainstream wastewater treatment. However, the presence of chemical oxygen demanding in influent would result in a poor nitrogen removal efficiency during the deammonification process. In this study, the simultaneous partial nitrification, anammox and denitrification process (SNAD) for mainstream nitrogen removal was investigated in an integrated fixed film activated sludge (IFAS) reactor. SNAD-IFAS process achieved a total nitrogen (TN) removal efficiency of 72 +/- 2% and an average COD removal efficiency was 88%. The optimum COD/N ratio for mainstream wastewater treatment was 1.2 +/- 0.2. Illumina sequencing analysis and activity tests showed that anammox and denitrifying bacteria were the dominant nitrogen removal microorganism in the biofilm and the high COD/N ratios (>= 2.0) leaded to the proliferation of heterotrophic bacteria (Hydrogenophaga) and nitrite-oxidizing bacteria (Nitrospira) in the suspended sludge. Network analysis confirmed that anammox bacteria (Candidatus Kuenenia) could survive in organic matter environment due to that anammox bacteria displayed significant co-occurrence through positive correlations with some heterotrophic bacteria (Limnobacter) which could protect anammox bacteria from hostile environments. Overall, the results of this study provided more comprehensive information regarding the community composition and assemblies in SNAD-IFAS process for mainstream nitrogen removal. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：457 / 466
页数：10
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