期刊论文

中文

中国环境科学

1000-6923

2024

44

07

3780-3785

10.3969/j.issn.1000-6923.2024.07.023

52370187:国家自然科学基金 KQ2107018:长沙市科技计划资助项目 22A0172:湖南省教育厅资助项目 22B1084:湖南省教育厅资助项目

本校为第一机构

以序批式活性污泥(SBR)工艺为例,从脱氮除磷性能、微生物及酶活性等方面研究了Tl暴露浓度对活性污泥性能的短期扰动及其恢复行为.结果表明:活性污泥的脱氮除磷性能和COD去除均易受Tl的影响.当Tl为 500µg/L时,脱氮除磷被抑制,但Tl暴露消除后,性能可恢复.而当Tl为 1000µg/L时,尽管除磷效率可恢复至65%,但脱氮过程完全被抑制且不可逆.低浓度Tl提高了COD去除率且高浓度Tl对COD去除的影响是可逆的.此外,200µg/L的Tl提高了微生物活性,但1000µg/L的Tl会导致过氧化氢酶和超氧化物歧化酶相对产量分别降低至71.9%和30.8%,极大抑制了微生物活性;比耗氧速率对Tl的存在与消失均很敏感,可作为污水处理厂Tl...

In this study,using the Sequencing Batch Reactor(SBR)process as an example,the short-term disturbances and recovery behavior of activated sludge performance with respect to Tl exposure concentration were investigated,focusing on nitrogen and phosphorus removal,microbiological and enzyme activity.The results indicated that both nitrogen and phosphorus removal efficiency and COD removal rate of activated sludge were susceptible to the influence of Tl.When Tl was at a concentration of 500µg/L,nitrogen and phosphorus removal processes were inhibit...