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Reed Biochar Addition to Composite Filler Enhances Nitrogen Removal from BDBR Systems in Eutrophic Rivers Channel

文献类型： 外文期刊

作者： Chang, Yajun 1 ; Liu, Jie 1 ; Tang, Qiang 6 ; Sun, Linhe 2 ; Cui, Jian 2 ; Liu, Xiaojing 2 ; Yao, Dongrui 2 ; Han, Shiqun 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

2.Inst Bot, Nanjing, Jiangsu, Peoples R China

3.Chinese Acad Sci, Nanjing Bot Garden Mem Sun Yat Sen, Nanjing 210014, Peoples R China

4.Jiangsu Engn Res Ctr Aquat Plant Resources & Wate, Nanjing 210014, Peoples R China

5.Nanjing Wondux Environm Protect Technol Corp Ltd, Nanjing 211122, Peoples R China

6.Soochow Univ, Sch Rail Transportat, Yangchenghu Campus, Suzhou 215131, Peoples R China

关键词： reed biochar; BDBR system; eutrophic channel; nitrogen removal efficiency; microbial diversity

期刊名称：WATER （ 2020影响因子：3.103； 五年影响因子：3.229 ）

ISSN：

年卷期： 2021 年 13 卷 18 期

页码：

收录情况： SCI

摘要： With the rapid development of urbanization in China, the eutrophication or black stink of urban rivers has become a critical environmental problem. As a research hotspot in wastewater purification, biofilm technology has shortcomings, such as insufficient carbon sources for denitrification. This study used a Biofilm Denitrification Batch Reactor (BDBR) system constructed using reed biochar as the carbon source required in denitrification, significantly accelerating the biofilm formation. To determine the suitable amount of biochar for water purification from the urban eutrophic rivers by the BDBR system, 0%, 5%, 10%, and 15% reed biochar was added to the viscose fiber combined packing. The combined packing reactor involved in this study had a high removal efficiency of the eutrophication channel COD throughout the experiment. However, adding 5% and 10% biochar in the combined filler effectively increased the number of nitrifying and denitrifying bacteria on the biofilm, improved the dominant bacteria diversity and microbial activity, and enhanced denitrification efficiency in the BDBR system. It provides new ideas and methods for developing and applying in situ denitrification technology for urban polluted rivers.

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