Construction of autotrophic nitrogen removal system based on zero-valent iron (ZVI): performance and mechanism

被引：17
|
作者：
Yang, Han [1 ,2 ,3 ]
Deng, Liangwei [1 ,2 ]
Xiao, Youqian [1 ,2 ]
Yang, Hongnan [1 ,2 ]
Wang, Hong [1 ,2 ]
Zheng, Dan [1 ,2 ]
机构：
[1] Minist Agr & Rural Affairs, Biogas Inst, Chengdu 610041, Peoples R China
[2] Minist Agr & Rural Affairs, Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Peoples R China
[3] Chengdu Drainage Ltd Liabil Co, Chengdu 610000, Peoples R China
来源：
WATER SCIENCE AND TECHNOLOGY | 2020年 / 82卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Anammox; autotrophic denitrification; Feammox; zero-valent iron; START-UP; DENITRIFICATION; NITRIFICATION;
D O I：
10.2166/wst.2020.544
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, the performance and mechanism of nitrogen removal in sequencing batch reactors (SBRs) with and without zero-valent iron (ZVI) was investigated. The results showed that ZVI had a capacity to promote NH4+-N conversion, NO2--N accumulation and total inorganic nitrogen (TIN) removal, with the TIN removal rate being increased by 29.45%. The ZVI also had a significant impact on microbial community structure by means of high-throughput pyrosequencing, increasing the enrichment of Anammox (anaerobic ammonium oxidation) bacteria Candidatus Brocadia and Feammox (anaerobic ferric ammonium oxidation) bacteria Ignavibacterium. With ZVI addition, the main pathway of nitrogen removal was changed from nitrification-heterotrophic denitrification to Anammox and Feammox.
引用
收藏
页码：2990 / 3002
页数：13
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