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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Evaluation of INT-electron transport system activity and OUR tests for heavy metal inhibition of activated sludge
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Evaluation of INT-electron transport system activity and OUR tests for heavy metal inhibition of activated sludge

机译：评估INT电子传输系统活性和OUR试验对重金属抑制活性污泥的作用

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摘要

The sensitivities of INT-electron transport system activity and OUR tests to Cu_(2+), Zn_(2+), Cd_(2+), Hg_(2+), Ni_(2+), Pb_(2+) and Ag_+ and the inhibition of the two tests and COD removal rate under heavy metal toxicity were compared to evaluate both the tests for assessing heavy metal inhibition of activated sludge. The median inhibitory concentrations (IC50s) of the seven tested heavy metals measured via OUR test were lower than those measured via INT test, which indicates that the INT-electron transport system activity test was less sensitive to heavy metal toxicity than the OUR test. Tested heavy metals brought about similar decrease in OUR and COD removal rate, but less decrease in INT-electron transport system activity than COD removal rate, which suggests that the OUR is a better parameter for reflecting heavy metal inhibition of activated sludge than INT-electron transport system activity. The ranking of tested heavy metals in order of decreasing toxicity based on INT test was Hg~(2+), Ag~+, Cu~(2+), Cd~(2+), Zn~(2+), Ni~(2+) and Pb~(2+), and the ranking based on OUR test was Hg~(2+), Cu~(2+), Ag~+, Cd~(2+), Zn~(2+), Ni~(2+) and Pb~(2+).
机译：INT电子传输系统活性和OUR测试对Cu_（2 +），Zn_（2 +），Cd_（2 +），Hg_（2 +），Ni_（2 +），Pb_（2+）和Ag_的敏感性+并比较了两种测试的抑制率和重金属毒性下的COD去除率，以评估两种测试对活性污泥的重金属抑制率。通过OUR试验测得的7种被测重金属的中值抑制浓度（IC50s）低于通过INT试验测得的中值浓度，这表明INT电子传输系统活性测试对重金属毒性的敏感性低于OUR测试。经测试的重金属导致OUR和COD去除率的下降类似，但INT电子传输系统活性的下降小于COD去除率，这表明OUR是比INT电子更好的参数，反映了重金属对活性污泥的抑制作用运输系统活动。根据INT试验，按毒性降低的顺序测试的重金属等级为Hg〜（2 +），Ag〜+，Cu〜（2 +），Cd〜（2 +），Zn〜（2 +），Ni〜 （2+）和Pb〜（2+），根据OUR测试的排名为Hg〜（2 +），Cu〜（2 +），Ag〜+，Cd〜（2 +），Zn〜（2+） ），Ni〜（2+）和Pb〜（2+）。

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