BS EN ISO 11733:2004 Water quality. Determination of the elimination and biodegradability of organic compounds in an aqueous medium. Activated sludge simulation test
1 Scope
This International Standard specifies a method for the determination of the elimination and the biodegradability of organic compounds by aerobic micro-organisms. The conditions described simulate a waste-water treatment plant. Two test systems can be used: activated sludge plants or porous pots. The tests can optionally be performed under conditions of nitrification and denitrification (Annex A) and coupling of the units (Annex B).
The method applies to organic compounds which, under the conditions of the test, are
a) soluble in tap water at the test concentration and not expected to be transformed to insoluble metabolites if biodegradation , in addition to elimination, is determined;
b) poorly water-soluble, but which are satisfactorily dispersible in water and allow detection with suitable analytical means (e.g. organic carbon measurements);
c) non-volatile, or which have a negligible vapour pressure under the test conditions;
d) not inhibitory to the test micro-organisms at the concentration chosen for the test. Inhibitory effects can be determined by using a suitable test method (e.g. ISO 8192 [15] or ISO 15522 [27] ). Compounds inhibitory at concentrations used in this test may be tested at concentrations less than their EC 20 ...
BS EN ISO 11733:2004 history
0000 BS EN ISO 11733:2004(2008)
2005BS EN ISO 11733:2005 Water quality - Determination of the elimination and biodegradability of organic compounds in an aqueous medium - Activated sludge simulation test
2005BS EN ISO 11733:2004 Water quality. Determination of the elimination and biodegradability of organic compounds in an aqueous medium. Activated sludge simulation test