High-effective denitrification of low C/N wastewater by combined constructed wetland and biofilm-electrode reactor (CW-BER)

被引：95
作者：
He, Yuan [1 ]
Wang, Yuhui [1 ]
Song, Xinshan [1 ]
机构：
[1] Donghua Univ, Sch Environm Sci & Engn, Shanghai 201620, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2016年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Low C/N; Denitrification; Constructed wetland; Biofilm-electrode reactor; Combined reactor; AUTOTROPHIC DENITRIFICATION; NITROGEN REMOVAL; NITRATE REMOVAL; DRINKING-WATER; HETEROTROPHIC DENITRIFICATION; BIOELECTROCHEMICAL SYSTEMS; BACTERIAL COMMUNITY; CARBON SOURCE; GROUNDWATER; PERFORMANCE;
D O I：
10.1016/j.biortech.2015.12.060
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The low denitrification effect on constructed wetlands (CWs) treating low carbon to nitrogen ratio (C/N) wastewater was a problem. In this study, a novel coupled system by installing CW and biofilm-electrode reactor (CW-BER) was developed. In this system, the heterotrophic and autotrophic denitrifying bacteria all played their roles in denitrification process. The system was investigated systematically with simulated wastewater at different C/Ns, electric current intensities (I), hydraulic retention times (HRTs), and pH. Results showed that the optimum running conditions were C/N = 0.75-1, I = 15 mA, HRT = 12 h, and pH = 7.5. The highest removal efficiency of NO3-N and TN at the best conditions was respectively 63.03% and 98.11% for CW-BER. Also, the TN and NO3-N enhancive removal efficiency of CW-BER was 23.26% and 24.20%, respectively. No residual organic carbon source was detected in final effluent at the best parameters. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：245 / 251
页数：7
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