重金属铊对新型后置缺氧反硝化工艺的影响  

Impact of Heavy Metal Thallium on a Novel Post-anoxic Denitrification Process

作　　者：孙莉莉[1] 李长福 姚登辉 SUN Li-li;LI Chang-fu;YAO Deng-hui(School of Environmental Engineering,Yellow River Conservancy Technical Institute,Kaifeng 475004,China;Henan GRG Metrology&Test Co.Ltd.,Zhengzhou 450000,China)

机构地区：[1]黄河水利职业技术学院环境工程学院,河南开封475004 [2]河南广电计量检测有限公司,河南郑州450000

出　　处：《中国给水排水》2024年第15期75-82,共8页China Water & Wastewater

基　　金：河南省重大科技专项(221100320200);河南省重点研发专项(231111320200)。

摘　　要：针对重金属铊(Tl)对新型后置缺氧反硝化工艺运行效能影响不明确的现状,通过控制进水Tl浓度,在室温下考察了Tl对新型后置缺氧反硝化工艺运行效能的影响,并揭示了相关作用机制。结果表明,即使低浓度Tl(5μg/L)也可降低工艺对污染物和营养盐的去除效果。此外,Tl影响了后置缺氧反硝化工艺中污泥的特征,降低了总悬浮固体(TSS)浓度及VSS/TSS值,刺激了胞外聚合物(EPS)的分泌。胞内聚合物分析表明,Tl抑制了聚羟基脂肪酸酯(PHA)的合成,但促进了糖原质的代谢。微生物群落结构分析表明,高浓度Tl降低了门水平上Proteobacteria、属水平上Chloroplast和Devosia的相对丰度,进而降低了污染物和营养盐的去除效果。In light of the ambiguous impact of thallium(Tl)on the operational performance of a novel post-anoxic denitrification process,an investigation into the influence of Tl on the novel post-anoxic denitrification process at room temperature was conducted by regulating the influent Tl concentration,and the underlying mechanism was elucidated.Even the low concentration of Tl(5μg/L)hindered the effective removal of pollutants and nutrients in the process.Furthermore,Tl influenced the sludge characteristics in the post-anoxic denitrification process,decreased total suspended solids(TSS)concentration and VSS/TSS ratio,and promoted the secretion of extracellular polymeric substances(EPS).The intracellular polymeric substances analysis revealed that Tl decreased the concentration of polyhydroxyalkanoate(PHA),but enhanced the metabolism of glycogen.The analysis of microbial community composition revealed that a high concentration of Tl led to a decrease in the relative abundance of Proteobacteria at the phylum level,and the relative abundance of Chloroplast and Devosia at the genus level,consequently diminishing the removal efficiency of pollutants and nutrients.

关 键 词：重金属Tl 后置缺氧反硝化 营养盐去除 胞外聚合物 

分 类 号：TU992[建筑科学—市政工程]