Simultaneous removal of Fe3+ and nitrate in the autotrophic denitrification immobilized systems | Zendy

Junfeng Su | Zendy; Ting Lian | Zendy; Ting Huang | Zendy; Dong Liang | Zendy; Wen dong Wang | Zendy

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Simultaneous removal of Fe3+ and nitrate in the autotrophic denitrification immobilized systems

Author(s) -

Junfeng Su,

Ting Lian,

Ting Huang,

Dong Liang,

Wen dong Wang

Publication year - 2017

Publication title -

water science and technology water supply

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 39

eISSN - 1607-0798

pISSN - 1606-9749

DOI - 10.2166/ws.2017.186

Subject(s) - denitrification , nitrate , chemistry , hydraulic retention time , autotroph , pellets , response surface methodology , nuclear chemistry , chromatography , environmental engineering , nitrogen , wastewater , bacteria , biology , organic chemistry , paleontology , genetics , engineering

In this study, strain CC76, identified as Enterobacter sp., was tested for the reduction of Fe 3+ and denitrification using immobilized pellets with strain CC76 as experimental group (IP) and immobilized pellets with strain CC76 and magnetite powder as experimental group (IPM) in the autotrophic denitrification immobilized systems (ADIS). Compared with IP, a higher nitrate removal rate was obtained with IPM by using three levels of influent Fe 3+ (0, 5, and 10 mg/L), four levels of pH (5.0, 6.0, 7.0, and 8.0), and three levels of hydraulic retention time (HRT) (12, 14, and 16 h), respectively. Furthermore, response surface methodology (RSM) analysis demonstrated that the optimum removal ratios of nitrate of 87.21% (IP) and 96.27% (IPM) were observed under the following conditions: HRT of 12 h, pH of 7.0 and influent Fe 3+ concentration of 5 mg/L (IP) and 1 mg/L (IPM).

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