DS/EN ISO 9509-2006

Water quality - Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms

DS/EN ISO 9509-2006 发布历史

This International Standard 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 4 h or up to 24 h with weakly nitrifying sludge.The method is applicable with 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 (e.g. N-allylthiourea; see Annex A). If the nitrification rate is wit

DS/EN ISO 9509-2006由丹麦标准化协会 DK-DS 发布于 2006-09-27，并于 2006-09-27 实施。

DS/EN ISO 9509-2006在国际标准分类中归属于: 13.060.70 水的生物学特性的检验。

DS/EN ISO 9509-2006的历代版本如下：

• 2006年09月27日 DS/EN ISO 9509-2006

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标准号

DS/EN ISO 9509-2006

发布日期

2006年09月27日

实施日期

2006年09月27日

废止日期

无

国际标准分类号

13.060.70

发布单位

DK-DS

被代替标准

DS/EN ISO 9509-1996

适用范围

This International Standard 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 4 h or up to 24 h with weakly nitrifying sludge.The method is applicable with 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 (e.g. N-allylthiourea; see Annex A). If the nitrification rate is wit