The effect of C/N ratio on nitrogen removal in a bioelectrochemical system
The effect of C/N ratio on nitrogen removal in a bioelectrochemical system
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C/N比对生物电化学系统脱氮的影响
DOI：
10.1016/j.biortech.2012.12.192
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发表时间：
2013-03-01
影响因子：
11.4
通讯作者：
Shen, Dongsheng
中科院分区：
文献类型：
--
作者：
Huang, Baocheng;Feng, Huajun;Shen, Dongsheng
研究了生物电化学系统(BES)中C/N比分别为2、2.7和3.5对脱氮效果的影响。淀粉被用作我们在先前研究中观察到的生电现象的碳源。结果表明，提高C/N比有利于BES去除硝酸盐，抑制亚硝酸盐积累，但不会增加自养反硝化作用。当C/N比从2.0增加到3.5时，硝酸盐和总氮的去除分别从0.69+/-0.02gm(-3)h(-1)增加到1.09+/-0.16gm(-3)h(-1)和从0.52+/-0.08gm(-3)h(-1)增加到0.97+/-0.06gm(-3)h(-1)。而在C/N比相同的情况下，自养反硝化率从72.74%下降到50.23%。高C/N比延缓了可溶性微生物产物的分泌，增加了生电作用，但没有提高阳极转化效率。(C)2013爱思唯尔有限公司。保留所有权利。
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.