Carbon-to-nitrogen ratio influence on the performance of bioretention for wastewater treatment
Wang, Yajun1,2; Singh, Rajendra Prasad2,3; Geng, Chongchong1; Fu, Dafang2,3
AbstractBioretention cell (BRC), bioretention cell with microbial fuel cell (BRC-MFC), and an enhanced combined BRC-MFC system with bimetallic zero-valent iron (BRC-MFC-BZVI) were implemented in current study to treat the domestic wastewater. Nitrogen removal characteristics of three systems were investigated by adjusting influent carbon/nitrogen ratio (C/N ratio of 2.54-19.36). Results revealed that the nitrification and denitrification performances were mainly influenced by organic matter and system combination, which further affected nitrogen removal. When the influent C/N ratio was between 2 to 3, compared with BRC system, in BRC-MFC and BRC-MFC-BZVI system, chemical oxygen demand (COD), total nitrogen (TN), and ammonical nitrogen (NH4+-N) removal efficiencies were still reached to 83.04%, 61.06%, and 42.26% and 86.53%, 43.61%, and 50.99% respectively, which simultaneously achieved high-efficiency of organic matter and nitrogen removal. The efficient supply of electrons in the BRC-MFC and BRC-MFC-BZVI processes was the main reason to achieve profound denitrification removal under the condition of low C/N. Removal rates of nitrate (NO3--N) and nitrite (NO2--N) were relatively higher due to microbial-driven redox reactions caused by driving electrons to flow in the closed circuit of metal wire connection. Moreover, phylogenetic diversity of bacterial communities mainly induced the catalytic iron, which further enhanced biological nitrogen reduction. The maximum efficient removal of organic matter (OM), TN, and NH4 + -N were obtained in the BRC-MFC-BZVI system, which were 98.42% (C/N = 10.42), 55.61% (C/N = 4.16), and 61.13% (C/N = 4.16), respectively.
KeywordBioretention Biogeobattery Nitrogen removal Carbon-to-nitrogen ratio Wastewater treatment
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[51550110231] ; Key technology Program of Gansu province[JK2018-16] ; National Key Technologies RD Program[2015BAL02B05]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000520811800005
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSingh, Rajendra Prasad; Fu, Dafang
Affiliation1.Lanzhou Univ Technol, Sch Civil Engn, 287 Langongping, Lanzhou 730050, Peoples R China
2.Southeast Univ, Sch Civil Engn, 2 Sipailou, Nanjing 210096, Peoples R China
3.Southeast Univ, Monash Univ, Joint Res Ctr Future Cities, Nanjing 210096, Peoples R China
First Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Wang, Yajun,Singh, Rajendra Prasad,Geng, Chongchong,et al. Carbon-to-nitrogen ratio influence on the performance of bioretention for wastewater treatment[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2020.
APA Wang, Yajun,Singh, Rajendra Prasad,Geng, Chongchong,&Fu, Dafang.(2020).Carbon-to-nitrogen ratio influence on the performance of bioretention for wastewater treatment.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH.
MLA Wang, Yajun,et al."Carbon-to-nitrogen ratio influence on the performance of bioretention for wastewater treatment".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2020).
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