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CEN

EN ISO 9408:1999

(Main)

Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium by determination of oxygen demand in a closed respirometer (ISO 9408:1999)

Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium by determination of oxygen demand in a closed respirometer (ISO 9408:1999)

Migrated from Progress Sheet (TC Comment) (2000-07-10): N 315: New TD (980916)

Wasserbeschaffenheit - Bestimmung der vollständigen aerobiologischen Abbaubarkeit organischen Stoffe im wäßrigen Medium über die Bestimmung des Sauerstoffbedarfs in einem geschlossenen Respirometer (ISO 9408:1999)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der vollständigen biologischen Abbaubarkeit einer organischen Substanz bei einer vorgegebenen Konzentration in einem wäßrigen Medium durch aerobe Mikroorganismen über die Bestimmung des Sauerstoffbedarfs in einem geschlossenen Respirometer fest. Das Verfahren ist auf organische Substanzen anwendbar, die folgende Eigenschaften besitzen: a) wasserlöslich unter den Testbedingungen; b) schwer wasserlöslich unter den Testbedingungen. In diesem Fall können besondere Maßnahmen erforderlich sein, um eine gute Dispersion der Prüfsubstanz zu erreichen ; etc.

Qualité de l'eau - Evaluation de la biodégradibilité aérobieultime des composés organiques, en milieux aqueux, par détermination de la demande en oxygène dans un respiromètre ferméomètre fermé (ISO 9408:1999)

La présente Norme internationale spécifie une méthode d'évaluation, en milieu aqueux, de la biodégradabilité ultime de composés organiques et d'eaux résiduaires présents à une concentration donnée sous l'action de microorganismes aérobies, par détermination de la demande en oxygène dans un respiromètre fermé.  La méthode est applicable à des composés organiques :  a) solubles dans l'eau dans les conditions de l'essai;  b) peu solubles dans l'eau dans les conditions de l'essai, auquel cas il peut être nécessaire de prendre des mesures particulières assurant une bonne dispersion du composé (voir, par exemple, l'ISO 10634) ;  c) n'atteignant pas l'absorbant de C02 et ne réagissant pas avec lui ;  d) volatils, à condition d'utiliser un respiromètre adapté ou des conditions appropriées (par exemple un plus petit rapport entre les volumes de l'espace de tête et du milieu liquide) ;  e) n'ayant pas d'effet inhibiteur sur les micro-organismes d'essai à la concentration choisie pour l'essai. La présence d'un effet inhibiteur peut être mis en évidence suivant la méthode spécifiée en 7.3, ou par toute autre méthode de détermination de l'effet inhibiteur d'un composé sur les bactéries (voir, par exemple, l'ISO 8192).  
NOTE Les conditions décrites dans la présente Norme internationale ne correspondent pas toujours aux conditions optimales d'obtention de la biodégradation maximale. D'autres méthodes de biodégradation sont données dans l'ISO 15462.

Kakovost vode – Vrednotenje “končne” aerobne biorazgradljivosti organskih spojin v vodi z določevanjem porabe kisika v zaprtem raspirometru (ISO 9408:1999)

General Information

Status
Published
Publication Date
31-Jul-1999
ICS
13.060.01 - Water quality in general
Technical Committee
CEN/TC 230 - Water analysis
Drafting Committee
CEN/TC 230/WG 2 - Biological methods
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
21-May-2008
Completion Date
21-May-2008
Ref Project
SIST EN ISO 9408:2000 - Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium by determination of oxygen demand in a closed respirometer (ISO 9408:1999)

Relations

Replaces
EN 29408:1993 - Water quality - Evaluation in an aqueous medium of the "ultimate" aerobic biodegradability of organic compounds - Method of determining the oxygen demand in a closed respirometer (ISO 9408:1991)
Effective Date
22-Dec-2008

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SLOVENSKI STANDARD
SIST EN ISO 9408:2000
01-januar-2000
1DGRPHãþD
SIST EN 29408:1998
.DNRYRVWYRGH±9UHGQRWHQMH³NRQþQH´DHUREQHELRUD]JUDGOMLYRVWLRUJDQVNLK
VSRMLQYYRGL]GRORþHYDQMHPSRUDEHNLVLNDY]DSUWHPUDVSLURPHWUX ,62

Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in
aqueous medium by determination of oxygen demand in a closed respirometer (ISO
9408:1999)
Wasserbeschaffenheit - Bestimmung der vollständigen aerobiologischen Abbaubarkeit
organischen Stoffe im wäßrigen Medium über die Bestimmung des Sauerstoffbedarfs in
einem geschlossenen Respirometer (ISO 9408:1999)
Qualité de l'eau - Evaluation de la biodégradibilité aérobieultime des composés
organiques, en milieux aqueux, par détermination de la demande en oxygene dans un
respirometre ferméometre fermé (ISO 9408:1999)
Ta slovenski standard je istoveten z: EN ISO 9408:1999
ICS:
13.060.70 Preiskava bioloških lastnosti Examination of biological
vode properties of water
SIST EN ISO 9408:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9408:2000

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SIST EN ISO 9408:2000

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SIST EN ISO 9408:2000

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SIST EN ISO 9408:2000
INTERNATIONAL ISO
STANDARD 9408
Second edition
1999-08-01
Water quality — Evaluation of ultimate
aerobic biodegradability of organic
compounds in aqueous medium
by determination of oxygen demand
in a closed respirometer
Qualité de l'eau — Évaluation, en milieu aqueux, de la biodégradabilité
aérobie ultime des composés organiques par détermination de la demande
en oxygène dans un respiromètre fermé
A
Reference number
ISO 9408:1999(E)

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SIST EN ISO 9408:2000
ISO 9408:1999(E)
Contents Page
1 Scope .1
2 Terms and definitions .1
3 Principle.3
4 Test environment.3
5 Reagents.4
6 Apparatus .5
7 Procedure .5
8 Calculation and expression of results.8
9 Validity of results.10
10 Test report .11
Annex A (informative) Example of calculation of theoretical oxygen demand.12
Annex B (informative) Correction of oxygen uptake for interference by nitrification.14
(informative)
Annex C Example of a biodegradation curve .16
Annex D (informative) Closed respirometer .17
Bibliography.18
©  ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii

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SIST EN ISO 9408:2000
© ISO
ISO 9408:1999(E)
Foreword
ISO (the International Org
...

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