Simultaneous nitrogen removal and toxicity reduction of synthetic municipal wastewater by micro-electrolysis and sulfur-based denitrification biofilter

被引：26

作者：

Gao, Yilin ^{[1
]}

Huang, Hui ^{[1
]}

Peng, Chong ^{[1
]}

Fan, Xuan ^{[1
]}

Hu, Jun ^{[1
]}

Ren, Hongqiang ^{[1
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2020年 / 316卷

基金：

中国国家自然科学基金;

关键词：

Micro-electrolysis; Denitrification biofilters (DNBFs); Sulfur; Total nitrogen; Toxicity reduction; COMMUNITY; DONORS;

D O I：

10.1016/j.biortech.2020.123924

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Simultaneous nitrogen removal and toxicity reduction are critical for safe reuse of wastewater, but research in this area is limited. In this study, micro-electrolysis and sulfur-based denitrification biofilters (DNBFs) were applied for simultaneous nitrogen removal and toxicity reduction for municipal wastewater. When COD was 250 +/- 1 mg/L, NO3--N was 50 +/- 1 mg/L, total nitrogen (TN) of effluent was below 5 mg/L with the nitrogen load of 0.149 kg N/(m(3)center dot d) in all the reactors, while the effect of electrolysis on TN removal was not obvious. Micro-electrolysis promoted toxicity reduction by 8.7-17.4% only in sulfur-based DNBFs, and it also increased biofilm PN/PS by 7.56-43.46% and enhanced Cloacibacterium's abundance responsible for toxicity reduction (p < 0.05). Introduction of sulfur resulted in the contribution of sulfur-based autotrophic denitrification up to 21.48% and Sulfurimonas mainly contributed to toxicity reduction (p < 0.05).

引用

页数：7

共 20 条

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