摘要
本文旨在探讨超声波对短程硝化性能及镉(Cd)抑制下污泥特性的影响。通过6个SBR装置实验,发现超声辐照能显著降低出水氨氮浓度,提升氨氮去除率。在特定声能密度下,污泥TB-EPS蛋白质含量增加,AOB脱氮速率提升,而NOB活性降低。添加重金属镉后,SAOR(氨氧化)与SNOR(亚硝酸盐氧化)速率均受抑制。随着声能密度增加,AOB活性增强,NOB活性减弱。本研究揭示了超声辐照对污泥处理中硝化过程的调控作用,并发现其在重金属镉抑制下对硝化细菌活性具有选择性影响,有助于优化短程硝化工艺。
This paper aims to investigate the impact of ultrasound on the short-range nitrification performance and the characteristics of sludge under cadmium(Cd)suppression.Through experiments with six SBR devices,it was found that ultrasonic irradiation significantly reduced the effluent ammonia nitrogen concentration and improved the ammonia nitrogen removal rate.At specific sound energy densities,the protein content of sludge TB-EPS increased,the AOB(ammoniaoxidizing bacteria)nitrification rate improved,while the activity of NOB(nitrite-oxidizing bacteria)decreased.After the addition of the heavy metal cadmium,both the SAOR(ammonia oxidation rate)and SNOR(nitrite oxidation rate)were suppressed.As the sound energy density increased,AOB activity enhanced while NOB activity weakened.This research reveals the regulatory role of ultrasonic irradiation in the nitrification process of sludge treatment and identifies its selective impact on nitrifying bacteria activity under cadmium suppression,contributing to the optimization of short-range nitrification processes.
作者
汤聪
朱易春
段昕怡
TANG Cong;ZHU Yichun;DUAN Xinyi(School of Civil Engineering and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341411,China;School of Architecture and Design,Jiangxi University of Science and Technology,Ganzhou 341411,China)
出处
《水利建设与管理》
2024年第11期49-54,59,共7页
Water Conservancy Construction and Management
关键词
短程硝化
重金属镉(Cd)
超声波
低氨氮浓度
short-range nitrification
cadmium
ultrasound
low ammonia nitrogen concentration
