英文题名:Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Static test (Zahn-Wellens method) (ISO 9888:1999); German version EN ISO 9888:1999
The document 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 method can also be used to determine the elimination and biodegradability of organic compounds in waste water.