
BS EN ISO 9408:1999
Current
The latest, up-to-date edition.

Water quality. Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium by determination of oxygen demand in a closed respirometer
Hardcopy , PDF
English
15-10-1999
1 Scope
2 Terms and definitions
3 Principle
4 Test environment
5 Reagents
6 Apparatus
7 Procedure
8 Calculation and expression of results
9 Validity of results
10 Test report
Annex A (informative) Example of calculation of theoretical oxygen demand
Annex B (informative) Correction of oxygen uptake for interference by
nitrification
Annex C (informative) Example of a biodegradation curve
Annex D (informative) Closed respirometer
Bibliography
Applicable to soluble, insoluble and volatile organic compounds that are not inhibitory to the test microorganisms.
Committee |
EH/3/5
|
DevelopmentNote |
Supersedes BS EN 29408 Also numbered as BS 6068-5.11(1999) (09/1999) Supersedes 97/564772 DC (05/2005) Supersedes BS 6068-5.11(1993) (02/2006) Reviewed and confirmed by BSI, July 2008. (06/2008)
|
DocumentType |
Standard
|
Pages |
24
|
PublisherName |
British Standards Institution
|
Status |
Current
|
Supersedes |
This International Standard specifies a method, by determination of the oxygen demand in a closed respirometer, for the evaluation in aqueous medium of the ultimate biodegradability of organic compounds and waste waters at a given concentration by aerobic microorganisms. The method applies to organic compounds which are water-soluble under the conditions of the test; are poorly water-soluble under the conditions of the test, in which case special measures may be necessary to achieve good dispersion of the compound (see for example, ISO10634); do not reach and react with the CO2 absorbent; are volatile, provided that a suitable respirometer or suitable conditions (e.g. a smaller ratio of volume head space to volume liquid medium) are used; are not inhibitory to the test microorganisms at the concentration chosen for the test. The presence of inhibitory effects can be determined as specified in 7.3, or by using any other method for determining the inhibitory effect of a compound on bacteria (see, for example, ISO8192). NOTE 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 ISO15462.
Standards | Relationship |
I.S. EN ISO 9408:1999 | Identical |
DIN EN ISO 9408:1999-12 | Identical |
NF EN ISO 9408 : 1999 | Identical |
EN ISO 9408:1999 | Identical |
NEN EN ISO 9408 : 1999 | Identical |
NS EN ISO 9408 : 1ED 1999 | Identical |
UNE-EN ISO 9408:2000 | Identical |
UNI EN ISO 9408 : 2006 | Identical |
ISO 9408:1999 | Identical |
NBN EN ISO 9408 : 1999 | Identical |
SN EN ISO 9408 : 1999 | Identical |
ISO 11923:1997 | Water quality — Determination of suspended solids by filtration through glass-fibre filters |
ISO 9887:1992 | Water quality — Evaluation of the aerobic biodegradability of organic compounds in an aqueous medium — Semi-continuous activated sludge method (SCAS) |
ISO 8245:1999 | Water quality Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) |
ISO 6060:1989 | Water quality — Determination of the chemical oxygen demand |
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/TR 15462:2006 | Water quality Selection of tests for biodegradability |
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 |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.