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

被引：1
|
作者：
Su, Jun feng [1 ,2 ]
Lian, Ting ting [1 ]
Huang, Ting lin [1 ,2 ]
Liang, Dong hui [1 ]
Wang, Wen dong [1 ,2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China
[2] MOE, Key Lab Northwest Water Resources Environm & Ecol, Xian 710055, Shaanxi, Peoples R China
来源：
WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY | 2018年 / 18卷 / 05期
基金：
中国国家自然科学基金;
关键词：
autotrophic denitrification; Fe3+ reduction; immobilized pellets; magnetite powder; nitrate removal; RSM; REDUCING BACTERIA; WASTE-WATER; IRON; GROUNDWATER; REACTOR;
D O I：
10.2166/ws.2017.186
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, strain CC76, identified as Enterobacter sp., was tested for the reduction of Fe3+ 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 Fe3+ (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 Fe3thorn concentration of 5 mg/L (IP) and 1 mg/L (IPM).
引用
收藏
页码：1625 / 1634
页数：10
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