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ISO 14593:1999

Current
Current

The latest, up-to-date edition.

Water quality Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium Method by analysis of inorganic carbon in sealed vessels (CO2 headspace test)
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, French

Published date

18-03-1999

This International Standard specifies a method, by analysis of inorganic carbon, for the evaluation in an aqueous medium of the ultimate aerobic biodegradability of organic substances at a given concentration of microorganisms.

This International Standard is applicable to organic compounds which are:

a) water-soluble under the test conditions;

b) poorly water-soluble under the test conditions, in which case special measures may be necessary to achieve a good dispersion of the compound (see ISO 10634);

c) volatile; d) not inhibitory to the test microorganisms at the concentration chosen for the test.

In this test, biogenically produced inorganic carbon is measured in situ in the test vessels in such a manner that the rate measured nearly equals the rate of microbial production.

NOTE 1 The conditions described in this International Standard do not always correspond to the optimal conditions for allowing the maximum degree of biodegradation to occur. For alternative biodegradation methods see ISO 15462.

NOTE 2 With highly volatile substances, losses to the gaseous phase can be minimized by reducing the volume of the headspace. However, there should be sufficient oxygen in the test system to prevent biodegradation being oxygen-limited.

NOTE 3 The presence of an inhibitory effect can be determined as specified in 8.3, or by using any other method for determining the inhibitory effect of a substance on bacteria (see, for example, ISO 8192).

DevelopmentNote
Also numbered as BS 6068-5.23(1999) (05/2005)
DocumentType
Standard
Pages
15
PublisherName
International Organization for Standardization
Status
Current

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ISO 11923:1997 Water quality — Determination of suspended solids by filtration through glass-fibre filters
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ISO 9887:1992 Water quality — Evaluation of the aerobic biodegradability of organic compounds in an aqueous medium — Semi-continuous activated sludge method (SCAS)
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ISO 9888:1999 Water quality Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium Static test (Zahn-Wellens method)
ISO 7827:2010 Water quality Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium Method by analysis of dissolved organic carbon (DOC)
ISO 8192:2007 Water quality Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation
ISO 10634:1995 Water quality Guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium

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