Study of a combined sulfur autotrophic with proton-exchange membrane electrodialytic denitrification technology: Sulfate control and pH balance

被引：21

作者：

Wan, Dongjin ^{[1
,2
]}

Liu, Huijuan ^{[1
]}

Liu, Ruiping ^{[1
]}

Qu, Jiuhui ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Environm Aquat Chem, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

[2] Henan Univ Technol, Zhengzhou 450001, Henan, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 23期

基金：

国家高技术研究发展计划(863计划);

关键词：

Proton-exchange membrane electrodialysis; Autotrophic denitrification; Sulfur; Hydrogen; pH balance; AUTOHYDROGENOTROPHIC DENITRIFICATION; AQUEOUS-SOLUTION; BIOFILM REACTOR; NITRATE; WATER; REMOVAL; REDUCTION; SYSTEM;

D O I：

10.1016/j.biortech.2011.08.132

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A novel combined system established for nitrate removal from aqueous solution consisted of two parts: sulfur autotrophic denitrification and bio-electrochemical denitrification based on proton-exchange membrane electrodialysis (PEMED). The system was operated at various hydraulic retention times (HRT) and current intensities. Its optimum operation condition was also determined. The combined process had pH adjustment thus generating less nitrite than PEMED process. The denitrification rate of sulfur autotrophic part was dependent on HRT, while shorter HRT could reduce the sulfate generated by the sulfur autotrophic process. The denitrification rate of PEMED process depended on the applied current. For 32 +/- 1 mg-N/L nitrate in influent, the optimum operation parameters of combined process were: HRT 2 h; applied current 350 mA. The combined reactor could achieve 95.8% nitrate removal without nitrite accumulation, the pH of effluent kept neutral and the sulfate of effluent was 202.1 mg/L, lower than the drinking water standard in China. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：10803 / 10809

页数：7

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