Promotion of nitrogen removal in a denitrification process elevated by zero-valent iron under low carbon-to-nitrogen ratio

被引：24

作者：

Feng, Ze-Tong ^{[1
,2
]}

Ma, Xia

Sun, Ying-Jun

Zhou, Jia-Min ^{[1
,2
]}

Liao, Zu-Gang ^{[1
,2
]}

He, Zhi-Cong

Ding, Fei ^{[1
,2
]}

Zhang, Qian-Qian ^{[1
,2
]}

机构：

[1] Changan Univ, Sch Water & Environm, Xian 710054, Peoples R China

[2] Changan Univ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian 710054, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 386卷

关键词：

Denitrification; Zero-valent iron; Low C; N ratio; Performance; Mechanism; MICROBIAL DENITRIFICATION; ELECTRON; PERFORMANCE; BACTERIUM; SUBSTRATE; WATER; ACID;

D O I：

10.1016/j.biortech.2023.129566

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The nitrogen removal efficiency and distribution of microbial community in a denitrification process aided by zero-valent iron (ZVI) under low carbon-to-nitrogen ratio (C/N) were assessed in this study. Experimental results demonstrated that the nitrogen removal efficiency (TNRE) increased to 96.4 & PLUSMN; 2.72% and 63.3 & PLUSMN; 4.02% after continuous addition of ZVI with molar ratio of ZVI to nitrate (NO3--N) (ZVI/N) of 6 at C/N of 3 and 2, respectively, which was 4% and 7.7% higher than the blank one. Meanwhile, extracellular polymeric substance (EPS) could be used as electron transfer medium and endogenous carbon source for denitrification system and also the production of which increased by 28.43% and 53.10% under ZVI stimulation compared to the control group. Finally, a symbiotic system composed by autotrophic and heterotrophic denitrification bacteria was formed by aid of ZVI. This study proposed new insights into denitrification process improved by ZVI.

引用

页数：9

共 45 条

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