EN ISO 7827:2012
(Main)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 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 7827:2010)
ISO 7827:2010 specifies a method for the evaluation of the “ready” and “ultimate” biodegradability of organic compounds at a given range of concentrations by aerobic microorganisms. In this context, ISO 7827:2010 also gives specific definitions for the terms “ready” and “ultimate”.
The method applies to organic compounds which are: a) soluble at the concentration used under the conditions of the test [dissolved organic carbon (DOC) concentrations of 10 mg/l to 40 mg/l]; b) non‑volatile or having a negligible vapour pressure under the conditions of the test; c) not significantly adsorbable on glass and activated sludge; d) not inhibitory to the test microorganisms at the concentration chosen for the test.
The method is not suitable for waste waters, as they usually contain significant amounts of water‑insoluble organic carbon, which is not included in DOC measurements.
Wasserbeschaffenheit - Bestimmung der leichten, vollständigen aeroben biologischen Abbaubarkeit organischer Stoffe in einem wässrigen Medium - Verfahren mittels Analyse des gelösten organischen Kohlenstoffs (DOC) (ISO 7827:2010)
Diese Internationale Norm legt ein Verfahren zur Bestimmung der "leichten" und "vollständigen" biologischen Abbaubarkeit organischer Substanzen durch aerobe Mikroorganismen bei vorgegebenen Konzentrationen fest. In diesem Zusammenhang definiert diese Internationale Norm auch die Begriffe "leicht" und "vollständig".
Das Verfahren ist für organische Substanzen anwendbar, die folgende Eigenschaften besitzen:
a) löslich bei der verwendeten Konzentration unter den Testbedingungen (10 mg/l bis 40 mg/l DOC);
b) nicht flüchtig oder mit einem vernachlässigbaren Dampfdruck unter den Testbedingungen;
c) keine deutliche Adsorption an Glas und Belebtschlamm;
d) nicht hemmend gegenüber den Mikroorganismen des Inokulums bei der gewählten Testkonzentration.
Das Verfahren ist nicht für Abwässer geeignet, da diese üblicherweise deutliche Mengen an wasserunlöslichem organischem Kohlenstoff enthalten, der nicht von DOC Messungen erfasst wird.
Qualité de l'eau - Évaluation de la biodégradabilité aérobie «facile», «ultime» des composés organiques en milieu aqueux - Méthode par analyse du carbone organique dissous (COD) (ISO 7827:2010)
L'ISO 7827:2010 spécifie une méthode d'évaluation de la biodégradabilité «facile» et «ultime» des composés organiques à une gamme de concentrations données sous l'action de micro-organismes aérobies. Dans ce contexte, l'ISO 7827:2010 fournit également des définitions spécifiques des termes «facile» et «ultime».
La méthode s'applique à des composés organiques qui sont: a) solubles à la concentration utilisée dans les conditions de l'essai [concentrations de 10 mg/l à 40 mg/I de carbone organique dissous (COD)]; b) non volatils, ou ayant une tension de vapeur négligeable dans les conditions de l'essai; c) non absorbables significativement sur le verre et les boues activées; d) non inhibiteurs, à la concentration choisie pour l'essai, vis-à-vis des micro-organismes d'essai.
La méthode ne convient pas aux eaux usées, car elles contiennent en général des quantités importantes de carbone organique insoluble dans l'eau, qui ne fait pas partie des mesurages COD.
Kakovost vode - Vrednotenje "lahke", "končne" aerobne biološke razgradljivosti organskih snovi v vodnem okolju - Metoda določevanja raztopljenega organskega ogljika (DOC) (ISO 7827:2010)
Ta mednarodni standard določa metodo za vrednotenje »lahke« in »končne« biološke razgradljivosti organskih snovi pri določenem razponu koncentracij aerobnih mikroorganizmov. V tem smislu standard ISO 7827:2010 tudi podaja posebne opredelitve za izraza »lahka« in »končna«. Metoda se uporablja za organske snovi z naslednjimi lastnostmi: a) so topne pri uporabljeni koncentraciji pod pogoji preskusa [koncentracije raztopljenega organskega ogljika (DOC) od 10 mg/l do 40 mg/l]; b) so nehlapne ali imajo pod pogoji preskusa zanemarljiv parni tlak; c) niso znatno adsorbljive na steklu in aktivnem blatu; d) pri koncentraciji, izbrani za preskus, niso zaviralne za preskusne mikroorganizme. Metoda ni primerna za odpadne vode, saj običajno vsebujejo velike količine v vodi netopnega organskega ogljika, ki ni zajet v meritve DOC.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2013
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SIST EN ISO 7827:1997
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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 7827:2010)
Wasserbeschaffenheit - Bestimmung der "leichten", "vollständigen" aeroben biologischen
Abbaubarkeit organischer Stoffe in einem wässrigen Medium - Verfahren mittels Analyse
des gelösten organischen Kohlenstoffs (DOC) (ISO 7827:2010)
Qualité de l'eau - Évaluation de la biodégradabilité aérobie «facile», «ultime» des
composés organiques en milieu aqueux - Méthode par analyse du carbone organique
dissous (COD) (ISO 7827:2010)
Ta slovenski standard je istoveten z: EN ISO 7827:2012
ICS:
13.060.70 Preiskava bioloških lastnosti Examination of biological
vode properties of water
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 7827
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2012
ICS 13.060.70 Supersedes EN ISO 7827:1995
English Version
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
7827:2010)
Qualité de l'eau - Évaluation de la biodégradabilité aérobie Wasserbeschaffenheit - Bestimmung der leichten,
"facile", "ultime" des composés organiques en milieu vollständigen aeroben biologischen Abbaubarkeit
aqueux - Méthode par analyse du carbone organique organischer Stoffe in einem wässrigen Medium - Verfahren
dissous (COD) (ISO 7827:2010) mittels Analyse des gelösten organischen Kohlenstoffs
(DOC) (ISO 7827:2010)
This European Standard was approved by CEN on 8 December 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7827:2012: E
worldwide for CEN national Members.
Contents Page
Foreword . 3
Foreword
The text of ISO 7827:2010 has been prepared by Technical Committee ISO/TC 147 “Water quality” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 7827:2012 by
Technical Committee CEN/TC 230 “Water analysis” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2013, and conflicting national standards shall be withdrawn at
the latest by June 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 7827:1995.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 7827:2010 has been approved by CEN as a EN ISO 7827:2012 without any modification.
INTERNATIONAL ISO
STANDARD 7827
Third edition
2010-11-15
Water quality — Evaluation of the
“ready”, “ultimate” aerobic
biodegradability of organic compounds
in an aqueous medium — Method by
analysis of dissolved organic carbon
(DOC)
Qualité de l'eau — Évaluation de la biodégradabilité aérobie «facile»,
«ultime» des composés organiques en milieu aqueux — Méthode par
analyse du carbone organique dissous (COD)
Reference number
ISO 7827:2010(E)
©
ISO 2010
ISO 7827:2010(E)
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ii © ISO 2010 – All rights reserved
ISO 7827:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Principle .3
5 Test environment.3
6 Reagents .3
7 Apparatus.4
8 Procedure.5
9 Calculation and expression of results .7
10 Validity of the test.8
11 Test report.9
Annex A (informative) Typical degradation curve .10
Annex B (informative) Interpretation of results .11
Bibliography.13
ISO 7827:2010(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7827 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 5, Biological
methods.
This third edition cancels and replaces the second edition (ISO 7827:1994), which has been technically
revised.
iv © ISO 2010 – All rights reserved
INTERNATIONAL STANDARD ISO 7827:2010(E)
Water quality — Evaluation of the “ready”, “ultimate” aerobic
biodegradability of organic compounds in an aqueous
medium — Method by analysis of dissolved organic carbon
(DOC)
WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This standard does not purport to address all of the safety problems, if any, associated with
its use. It is the responsibility of the user to establish appropriate safety and health practices and to
ensure compliance with any national regulatory conditions.
IMPORTANT — It is absolutely essential that tests conducted according to this International Standard
be carried out by suitably trained staff.
SAFETY PRECAUTIONS — Activated sludge and sewage contain potentially pathogenic organisms.
Therefore take appropriate precautions when handling them. Handle toxic test compounds and those
whose properties are unknown with care.
1 Scope
This International Standard specifies a method for the evaluation of the “ready” and “ultimate” biodegradability
of organic compounds at a given range of concentrations by aerobic microorganisms. In this context, this
International Standard also gives specific definitions for the terms “ready” and “ultimate”.
The method applies to organic compounds which are:
a) soluble at the concentration used under the conditions of the test [dissolved organic carbon (DOC)
concentrations of 10 mg/l to 40 mg/l];
b) non-volatile or having a negligible vapour pressure under the conditions of the test;
c) not significantly adsorbable on glass and activated sludge;
d) not inhibitory to the test microorganisms at the concentration chosen for the test.
The method is not suitable for waste waters, as they usually contain significant amounts of water-insoluble
organic carbon, which is not included in DOC measurements.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 8245, Water quality — Guidelines for the determination of total organic carbon (TOC) and dissolved
organic carbon (DOC)
ISO 9408, Water quality — Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous
medium by determination of oxygen demand in a closed respirometer
ISO 7827:2010(E)
ISO 9439, Water quality — Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous
medium — Carbon dioxide evolution test
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
degradation time
t
time from the end of the lag time, t , until the time that about 90 % of the maximum level of biodegradation has
been reached
NOTE Degradation time is expressed in days.
3.2
inherent biodegradation
level of biodegradation achieved whic
...
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