DS/EN 29888:1993
水质．水介质中有机化合物好痒生物降解性的评估．静态试验（Zahn-Wellens法）

Water quality. Evaluation of the aerobic biodegradability of organic compounds in and aqueous medium. Static test (Zahn-Wellens method)

作废

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标准号

DS/EN 29888:1993

发布

1993年

发布单位

丹麦标准化协会

当前最新

DS/EN 29888:1993

 

 

适用范围

This International Standard specifies a method for the evaluation of the elimination and the "ultimate" biodegradability of organic compounds at a given concentration by aerobic micro-organisms. The conditions described in this International Stan-dard normally correspond to optimal conditions for allowing the maximum value of biodegradation to occur with the chosen inoculum in the test time. The method applies to organic compounds which are a) soluble at the concentration used under the test conditions; b) non-volatile, or which have a negligible vapour pressure under the test conditions; c) not lost by foaming from the test solution; d) not inhibitory to the test micro-organisms at the concentration chosen for the test. Inhibitory ef-fects can be determined by using a suitable test method (e.g. see ISO 8192). If the test compound is toxic, the test concentration has to be lower or a pre-exposed inoculum can be used. The method can also be used to measure the elim-ination and biodegradation of organic compounds in waste water (also called "test compound" in the method).

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