Plastics - Determination of the ultimate anaerobic biodegradation under high-solids anaerobic-digestion conditions - Method by analysis of released biogas (ISO 15985:2014)

ISO 15985:2014 specifies a method for the evaluation of the ultimate anaerobic biodegradability of plastics based on organic compounds under high-solids anaerobic-digestion conditions by measurement of evolved biogas at the end of the test. This method is designed to simulate typical anaerobic digestion conditions for the organic fraction of mixed municipal solid waste. The test material is exposed in a laboratory test to a methanogenic inoculum derived from anaerobic digesters operating only on pretreated household waste. The anaerobic decomposition takes place under high-solids (more than 20 % total solids) and static non-mixed conditions. The test method is designed to yield the percentage of carbon in the test material and its rate of conversion to evolved carbon dioxide and methane (biogas).

Kunststoffe - Bestimmung des vollständigen anaeroben Bioabbaus unter anaeroben High-Solid-Aufschlussbedingungen - Verfahren mittels Analyse des freigesetzten Biogases (ISO 15985:2014)

Plastiques - Évaluation de la biodégradation anaérobie ultime dans des conditions de digestion anaérobie à teneur élevée en solides - Méthode par analyse du biogaz libéré (ISO 15985:2014)

L'ISO 15985:2014 spécifie une méthode pour l'évaluation de la biodégradabilité anaérobie ultime des plastiques basée sur des composés organiques dans des conditions de digestion anaérobie à teneur élevée en solides, par mesurage du biogaz libéré à la fin de l'essai. La présente méthode est conçue pour simuler les conditions de digestion anaérobie caractéristiques de la fraction organique des déchets municipaux solides mixtes. Le matériau d'essai est exposé, lors d'un essai en laboratoire, à un inoculum méthanogène dérivé de digesteurs anaérobies fonctionnant uniquement avec des déchets ménagers prétraités. La décomposition anaérobie a lieu dans des conditions à teneur élevée en solides (plus de 20 % de matières solides totales) et statiques non mixtes. La méthode d'essai a pour objet de permettre d'obtenir le pourcentage de carbone contenu dans le matériau d'essai et son taux de conversion en dioxyde de carbone et en méthane (biogaz) libérés.
Les conditions décrites dans l'ISO 15985:2014 ne correspondent pas nécessairement aux conditions optimales permettant d'obtenir le taux maximal de biodégradation.

Polimerni materiali - Ugotavljanje dokončne anaerobne biodegradacije v pogojih anaerobne razgradnje pri visokem deležu trdnih snovi - Metoda z analizo sproščenega bioplina (ISO 15985:2014)

Standard ISO 15985:2014 določa metodo za ocenjevanje končne anaerobne biorazgradljivosti polimernih materialov, ki temeljijo na organskih sestavinah, pod pogoji anaerobne razgradnje pri visokem deležu trdnih snovi z merjenjem količine sproščenega bioplina na koncu preskusa. Ta metoda je zasnovana za simulacijo značilnih pogojev anaerobne razgradnje organskega deleža mešanih trdnih komunalnih odpadkov. Preskusni material je v laboratorijskem preskusu izpostavljen metanogenemu inokulumu, pridobljenemu iz anaerobnih gnilišč izključno za predhodno obdelane gospodinjske odpadke. Anaerobna razgradnja se odvija pri visokem deležu trdnih snovi (več kot 20 % trdnih snovi) in pri statičnih pogojih, pri čemer se odpadki ne mešajo. Preskusna metoda je zasnovana za prikaz deleža ogljika v preskusnem materialu ter njegove hitrosti pretvorbe v sproščeni ogljikov dioksid in metan (bioplin).

General Information

Status
Published
Publication Date
05-Dec-2017
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
06-Dec-2017
Completion Date
06-Dec-2017

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SLOVENSKI STANDARD
SIST EN ISO 15985:2018
01-februar-2018
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Plastics - Determination of the ultimate anaerobic biodegradation under high-solids

anaerobic-digestion conditions - Method by analysis of released biogas (ISO
15985:2014)

Kunststoffe - Bestimmung der vollständigen anaeroben biologischen Abbaubarkeit unter

anaeroben High-Solid-Aufschlussbedingungen - Verfahren mittels Analyse des
freigesetzten Biogases (ISO 15985:2014)

Plastiques - Évaluation de la biodégradation anaérobie ultime dans des conditions de

digestion anaérobie à teneur élevée en solides - Méthode par analyse du biogaz libéré

(ISO 15985:2014)
Ta slovenski standard je istoveten z: EN ISO 15985:2017
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 15985:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 15985:2018
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SIST EN ISO 15985:2018
EN ISO 15985
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2017
EUROPÄISCHE NORM
ICS 83.080.01
English Version
Plastics - Determination of the ultimate anaerobic
biodegradation under high-solids anaerobic-digestion
conditions - Method by analysis of released biogas (ISO
15985:2014)

Plastiques - Évaluation de la biodégradation anaérobie Kunststoffe - Bestimmung der vollständigen anaeroben

ultime dans des conditions de digestion anaérobie à biologischen Abbaubarkeit unter anaeroben High-

teneur élevée en solides - Méthode par analyse du Solid-Aufschlussbedingungen - Verfahren mittels

biogaz libéré (ISO 15985:2014) Analyse des freigesetzten Biogases (ISO 15985:2014)

This European Standard was approved by CEN on 17 October 2017.

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15985:2017 E

worldwide for CEN national Members.
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SIST EN ISO 15985:2018
EN ISO 15985:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 15985:2018
EN ISO 15985:2017 (E)
European foreword

The text of ISO 15985:2014 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the

International Organization for Standardization (ISO) and has been taken over as EN ISO 15985:2017 by

Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.

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 2018, and conflicting national standards shall be

withdrawn at the latest by June 2018.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 15985:2014 has been approved by CEN as EN ISO 15985:2017 without any modification.

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SIST EN ISO 15985:2018
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SIST EN ISO 15985:2018
INTERNATIONAL ISO
STANDARD 15985
Second edition
2014-05-01
Plastics — Determination of the
ultimate anaerobic biodegradation
under high-solids anaerobic-digestion
conditions — Method by analysis of
released biogas
Plastiques — Évaluation de la biodégradation anaérobie ultime dans
des conditions de digestion anaérobie à teneur élevée en solides —
Méthode par analyse du biogaz libéré
Reference number
ISO 15985:2014(E)
ISO 2014
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SIST EN ISO 15985:2018
ISO 15985:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
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SIST EN ISO 15985:2018
ISO 15985:2014(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 2

5 Test environment ................................................................................................................................................................................................. 2

6 Reagents ........................................................................................................................................................................................................................ 2

7 Apparatus ..................................................................................................................................................................................................................... 3

8 Procedure..................................................................................................................................................................................................................... 3

8.1 Preparation of the inoculum ....................................................................................................................................................... 3

8.2 Preparation of test material and reference material .............................................................................................. 4

8.3 Start-up of the test ............................................................................................................................................................................... 4

8.4 Incubation period ................................................................................................................................................................................. 4

8.5 Termination of the test ..................................................................................................................................................................... 5

9 Calculation and expression of results ............................................................................................................................................. 5

9.1 Calculation of gaseous carbon ................................................................................................................................................... 5

9.2 Calculation of the percentage biodegradation ............................................................................................................. 5

9.3 Calculation of loss in mass ............................................................................................................................................................ 6

9.4 Expression of results .......................................................................................................................................................................... 6

10 Validity of results ................................................................................................................................................................................................. 6

11 Test report ................................................................................................................................................................................................................... 6

Annex A (informative) Principle of test system ......................................................................................................................................... 8

Annex B (informative) Example of loss in mass determination ............................................................................................... 9

Bibliography .............................................................................................................................................................................................................................10

© ISO 2014 – All rights reserved iii
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SIST EN ISO 15985:2018
ISO 15985:2014(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information.

The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 5, Physical-

chemical properties.

This second edition cancels and replaces the first edition (ISO 15985:2004). It also incorporates the

Technical Corrigendum ISO 15985:2004/Cor.1:2007.
The main changes are:
a) requirements regarding disintegration removed in the whole document;
b) units added where necessary;
c) bibliography updated.
iv © ISO 2014 – All rights reserved
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SIST EN ISO 15985:2018
ISO 15985:2014(E)
Introduction

New types of plastic are being developed in which biodegradability is a specifically sought-for

characteristic. These plastics and derived products can be added to or used as feedstock for biological

recycling and recovery in aerobic composting plants or anaerobic biogasification plants. To make sure

these plastics are fit for biological recycling, their biodegradability must be demonstrated, preferably

by standard test methods.

Standard test methods which determine the degree of biodegradation under aerobic, high-solids

conditions have been developed (e.g. ISO 14855-1 and ISO 14855-2). However, it is well known from the

literature that the degree of biodegradation can differ significantly depending on the environmental

conditions such as the presence or the absence of oxygen (aerobic or anaerobic). To have a complete

understanding of the biodegradation characteristics of a plastic under these different environmental

conditions, various methods are required.

This International Standard specifies a method for the determination of the ultimate anaerobic

biodegradation of plastic materials under high-solids conditions. This is representative of systems

for the anaerobic biogasification of the organic fraction of municipal solid waste. Another method for

determining the degree of anaerobic biodegradation is ISO 11734. However, this method is designed for

soluble test materials in aqueous test conditions and at low concentrations (typically detergents) which

is not typical of plastics.
© ISO 2014 – All rights reserved v
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SIST EN ISO 15985:2018
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SIST EN ISO 15985:2018
INTERNATIONAL STANDARD ISO 15985:2014(E)
Plastics — Determination of the ultimate anaerobic
biodegradation under high-solids anaerobic-digestion
conditions — Method by analysis of released biogas
1 Scope

This International Standard specifies a method for the evaluation of the ultimate anaerobic

biodegradability of plastics based on organic compounds under high-solids anaerobic-digestion

conditions by measurement of evolved biogas at the end of the test. This method is designed to simulate

typical anaerobic digestion conditions for the organic fraction of mixed municipal solid waste. The test

material is exposed in a laboratory test to a methanogenic inoculum derived from anaerobic digesters

operating only on pretreated household waste. The anaerobic decomposition takes place under high-

solids (more than 20 % total solids) and static non-mixed conditions. The test method is designed to

yield the percentage of carbon in the test material and its rate of conversion to evolved carbon dioxide

and methane (biogas).

The conditions described in this International Standard might not always correspond to the optimum

conditions for the maximum degree of biodegradation to occur.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ultimate anaerobic biodegradation

breakdown of an organic compound by microorganisms in the absence of oxygen to carbon dioxide,

methane, water, and mineral salts of any other elements present (mineralization) plus new biomass

3.2
total dry solids

amount of solids obtained by taking a known mass of test material or inoculum and drying at about

105 °C to constant mass
3.3
volatile solids

amount of solids obtained by subtracting the residue of a known mass of test material or inoculum after

incineration at about 550 °C from the total dry solids content of the same sample

Note 1 to entry: The volatile solids content is an indication of the amount of organic matter present.

© ISO 2014 – All rights reserved 1
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SIST EN ISO 15985:2018
ISO 15985:2014(E)
3.4
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