Effect of electro-stimulation on activity of heterotrophic denitrifying bacteria and denitrification performance

被引：58
作者：
Liu, Hengyuan [1 ,2 ]
Tong, Shuang [1 ,2 ,3 ]
Chen, Nan [1 ,2 ]
Liu, Ying [1 ,2 ]
Feng, Chuanping [1 ,2 ]
Hua, Qili [1 ,2 ]
机构：
[1] China Univ Geosci, Minist Educ, Key Lab Groundwater Circulat & Evolut, Beijing 100083, Peoples R China
[2] China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China
[3] Univ S Florida, Dept Civil & Environm Engn, Tampa, FL 33620 USA
来源：
BIORESOURCE TECHNOLOGY | 2015年 / 196卷
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Denitrification; Bio-electrochemical process; Bacteria activity; Groundwater; Electro-stimulation; AUTOTROPHIC DENITRIFICATION; WASTE-WATER; NITRATE REDUCTION; DRINKING-WATER; GROUNDWATER; REMOVAL; REACTOR; ENHANCEMENT; CULTURE;
D O I：
10.1016/j.biortech.2015.07.076
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The effects of electro-stimulation on heterotrophic denitrifying bacterial activity and nitrate removal were investigated using a bench-scale bio-electrochemical reactor in this study. Results showed that the maximum nitrate removal efficiency was 100% at the optimum current density of 200 mA/m(2), at which low nitrite production and high ATP aggregate level were obtained. The activity of denitrifying bacteria was highest at the range densities of 200-250 mA/m(2), although the terminative pH increased to 8.62 at 200 mA/m(2) and 9.63 at 250 mA/m(2). This demonstrates that suitable current densities could improve the activity of denitrifying bacteria. Therefore, this study provides a number of useful information to improve the bio-electrochemical reactor designs and promote the removal efficiency of pollutants. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：123 / 128
页数：6
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