短程反硝化工艺对稀土矿山废水处理的中试研究  

Pilot study on treatment of rare earth mine wastewater by partial denitrification

作　　者：邓玉坤 DENG Yukun(Huizhou TCL Environmental Technology Co.,Ltd.,Huizhou 516000,China)

机构地区：[1]惠州TCL环境科技有限公司,广东惠州516000

出　　处：《工业水处理》2024年第8期149-155,共7页Industrial Water Treatment

摘　　要：通过中试规模试验研究验证在离子型稀土矿山废水处理中,短程反硝化(Part denitrification,PD)为厌氧氨氧化(Anaerobic ammonium oxidation,Anammox)提供底物NO_(2)^(-)的可能性。结果表明:接种城市污水处理厂剩余污泥,以实际矿山废水为进水,调控碳氮比(COD/N)降至2.1并采用实时COD/N控制策略可以保证PD反应器的启动和长期稳定运行,亚硝酸盐积累率(Nitrite accumulation ratio,NAR)保持在(58±7.32)%;微生物群落演变表明PD的主要贡献者Thauera菌属的相对丰度由初始的4.39%增至最终的17.58%;SEM-EDS显示Ca^(2+)与微生物分泌的胞外聚合物(Extracellular polymeric substances,EPS)结合,使污泥拥有良好的持留能力。为短程反硝化耦合厌氧氨氧化(PD/A)技术在大规模离子型稀土矿山尾水处理工程中的应用提供重要参考。In this study,a pilot scale experiment was conducted to verify the possibility of part denitrification(PD)to provide substrate NO_(2)^(-)for anaerobic ammonium oxidation(Anammox)in the treatment of ion-type rare earth mine wastewater.The results showed that the start-up and long-term stable operation of the PD reactor could be ensured by inoculating the residual sludge of the municipal sewage treatment plant,taking the actual mine wastewater as influent,regulating the carbon to nitrogen ratio(COD/N)to 2.1 and adopting the real-time COD/N control strategy.Nitrite accu⁃mulation ratio(NAR)was remained at(58±7.32)%.The evolution of microbial community showed that the relative abundance of Thauera,the main contributor to PD,increased from 4.39%at the beginning to 17.58%at the end.SEMEDS showed that Ca^(2+)combined with Extracellular polymeric substances(EPS)provided sludge good retention ability.This study provides an important reference for the application of partial denitrification coupled anammox(PD/A)tech⁃nology in large-scale ion-type rare earth mine tailwater treatment engineering.

关 键 词：短程反硝化 厌氧氨氧化 稀土矿山废水 

分 类 号：X703.1[环境科学与工程—环境工程]