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EVS-EN ISO 9509:2006

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

General information

Valid from 07.09.2006
Base Documents
ISO 9509:2006; EN ISO 9509:2006
Directives or regulations
None

Standard history

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Date
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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 3 h or up to 24 h with weakly nitrifying sludge.

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