ISO 9509:2006 水质 评价化学药品和污水对活性污泥中微生物硝化抑制作用的毒性试验方法

标准编号：ISO 9509:2006

中文名称：水质 评价化学药品和污水对活性污泥中微生物硝化抑制作用的毒性试验方法

英文名称：Water quality — Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms

发布日期：2006-07

标准范围

ISO 9509:2006规定了一种评估水、废水或试验物质对活性污泥中硝化细菌短期抑制作用的方法。对于弱硝化污泥，在通常3小时或最多24小时的暴露期内估计抑制效果。该方法适用于生活污水和合成污水产生的硝化活性污泥，以及工业废水和混合生活废水和工业废水产生的污泥。通过在有无特定抑制剂的情况下进行试验，验证污泥的硝化活性。如果硝化速率在试验的合适范围内，即每克悬浮固体和每小时2毫克氮到每克悬浮固体和每小时6.5毫克氮，则可直接使用污泥。如果没有，则需要进行调整。该方法适用于水溶性、非挥发性化学品和废水

ISO 9509:2006 specifies a method for assessing the short-term inhibitory effect of waters, waste waters or test substances on nitrifying bacteria in activated sludge. The inhibitory effect is estimated over an exposure period of usually 3 h or up to 24 h with weakly nitrifying sludge.The method is applicable to nitrifying activated sludge derived from domestic and synthetic sewage and also to sludges from industrial and mixed domestic and industrial waste waters.The nitrifying activity of the sludge is verified by testing in the presence and absence of a specific inhibitor. If the nitrification rate is within a suitable range for the test, i.e. 2 mg of nitrogen per gram of suspended solid and hour to 6,5 mg of nitrogen per gram of suspended solids and hour, the sludge may be used directly. If not, adjustments are necessary.The method is applicable to water-soluble, non-volatile chemicals, and to waste waters

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