The effect of C/N ratio on nitrogen removal in a bioelectrochemical system

被引：51
作者：
Huang, Baocheng [1 ,2 ]
Feng, Huajun [1 ,2 ]
Wang, Meizhen [1 ,2 ]
Li, Na [1 ,2 ]
Cong, Yanqing [1 ]
Shen, Dongsheng [1 ,2 ]
机构：
[1] Zhejiang Gongshang Univ, Coll Environm Sci & Engn, Hangzhou 310012, Zhejiang, Peoples R China
[2] Zhejiang Prov Key Lab Solid Waste Treatment & Rec, Hangzhou 310012, Zhejiang, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2013年 / 132卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Bioelectrochemical system; Denitrification; Soluble microbial products; C/N ratio; SOLUBLE MICROBIAL PRODUCTS; BIOLOGICAL DENITRIFICATION; ELECTRON-TRANSFER; NITRATE REMOVAL; FUEL-CELLS; GROUNDWATER; ELECTRICITY; SMP; GENERATION; WASTES;
D O I：
10.1016/j.biortech.2012.12.192
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The effect of C/N ratios of 2, 2.7, and 3.5 on nitrogen removal in a bioelectrochemical system (BES) was investigated. Starch was used as a carbon source for the electrogenesis phenomenon we observed in a previous study. The results showed that an increased C/N ratio helped the BES to remove nitrate and depress nitrite accumulation but did not increase autotrophic denitrification. Nitrate and total nitrogen removal were increased from 0.69 +/- 0.02 g m(-3) h(-1) to 1.09 +/- 0.16 g m(-3) h(-1), and from 0.52 +/- 0.08 g m(-3) h(-1) to 0.97 +/- 0.06 g m(-3) h(-1), respectively, when the C/N ratio was increased from 2.0 to 3.5. However, the autotrophic denitrification ratio decreased from 72.74% to 50.23% with the same increase in the C/N ratio. High C/N ratios postponed the excretion of soluble microbial products and increased electrogenesis, but did not improve the anode transformation efficiency. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：91 / 98
页数：8
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