蒽醌粒子复三维电极生物膜反应器反硝化特性
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摘要
制备了蒽醌粒子电极,并采用复三维电极生物膜反应器进行生物反硝化反应。通过扫描电镜和红外光谱对粒子电极进行了表征。结果表明,蒽醌活性炭粒子电极结构紧密,内部具有微孔结构,有利于微生物生长;电极表面富含醌基官能团,可有效提高反硝化速率;复三维电极生物膜反应器具有良好的p H值缓冲能力,当p H值为8、进水流量为110 m L/h、外加电流为15 m A时,填充蒽醌粒子电极的反应器平均电流效率可达到128%,能效较高,且反硝化效果好,硝酸盐氮的去除率为61%,分别是商品活性炭电极反应器和空白粒子电极反应器的2.77和1.22倍。
An anthraquinone modified particle electrode was prepared and used in a novel threedimensional biofilm-electrode reactor for bio-denitrification. The particle electrode were analyzed and determined by the SEM and the IR spectrum. The results showed as follows: the anthraquinone activated carbon particle electrode has a tight structure and ample quinone functional groups,which was conducive to microbial growth and bio-denitrification; the novel three-dimensional electrode biofilm reactor has satisfactory p H buffering capacity; when the operating conditions of the reactor were at p H 8,water flow 110 m L/h and current 15 m A,the average current efficiency of three-dimensional electrode biofilm reactor with the anthraquinone particle electrode( R3) was 128%,which was the highest efficiency among three reactors; the nitrate removal rate of R3 was 61%,which was 2. 77 and 1. 22 times of the commercial activated carbons reactor and the blank control reactor,respectively.
An anthraquinone modified particle electrode was prepared and used in a novel threedimensional biofilm-electrode reactor for bio-denitrification. The particle electrode were analyzed and determined by the SEM and the IR spectrum. The results showed as follows: the anthraquinone activated carbon particle electrode has a tight structure and ample quinone functional groups,which was conducive to microbial growth and bio-denitrification; the novel three-dimensional electrode biofilm reactor has satisfactory p H buffering capacity; when the operating conditions of the reactor were at p H 8,water flow 110 m L/h and current 15 m A,the average current efficiency of three-dimensional electrode biofilm reactor with the anthraquinone particle electrode( R3) was 128%,which was the highest efficiency among three reactors; the nitrate removal rate of R3 was 61%,which was 2. 77 and 1. 22 times of the commercial activated carbons reactor and the blank control reactor,respectively.
引文
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[3]王丽艳,万东锦,唐玉兰,等.生物法脱除水中硝酸盐的研究现状及展望[J].环境科学与技术,2014,37(S1):175-180.
[4]周欲飞,赵国智,田光明,等.一种新型异养自养集成工艺处理地下水硝酸盐试验[J].环境科学学报,2010,30(6):1170-1177.
[5]许晴,侯正浩,田秀蕾,等.醌基功能型高分子生物载体(PET-AQS)制备及催化生物反硝化特性研究[J].环境科学,2015,36(4):1374-1378
[6]Xi Z H,Guo J B,Lian J,et al.Study the catalyzing mechanism of dissolved redox mediators on bio-denitrification by metabolic inhibitors[J].Bioresour Technol,2013,140:22-27
[7]国家环境保护总局.水和废水监测分析方法(第4版)[M].北京:中国环境科学出版社,2002.
[8]He Y,Wang Y H,Song X S.High-effective denitrification of low C/N wastewater by combined constructed wetland and biofilm-electrode reactor(CW-BER)[J].Bioresour Technol,2016,203:245-251.
[9]Tong S,Chen N,Wang H,et al.Optimization of C/N and current density in a heterotrophic/biofilm-electrode autotrophic denitrication reactor(HAD-BER)[J].Bioresour Technol,2014,171:389-395.