Plastics — Determination of the ultimate anaerobic biodegradation of plastic materials in controlled slurry digestion systems — Method by measurement of biogas production

This document specifies a method of evaluating the ultimate anaerobic biodegradability of plastic materials in a controlled anaerobic slurry digestion system with a solids concentration not exceeding 15 %, which is often found for the treatment of sewage sludge, livestock faeces or garbage. The test method is designed to yield a percentage and rate of conversion of the organic carbon in the test materials to carbon dioxide and methane produced as biogas. The method applies to the following materials, provided they have a known carbon content: — natural and/or synthetic polymers, copolymers or mixtures; — plastic materials that contain additives such as plasticizers, colorants, or other compounds; — water-soluble polymers. It does not apply to materials which exhibit inhibitory effects on the test microorganisms at the concentration chosen for the test. NOTE Inhibitory effects can be determined by an inhibition test (e.g. ISO 13641-1 or ISO 13641-2).

Plastiques — Évaluation de la biodégradabilité anaérobie ultime des matériaux plastiques dans des systèmes de digestion de boue contrôlés — Méthode par mesurage de la production de biogaz

General Information

Status
Published
Publication Date
15-Apr-2019
Current Stage
9060 - Close of review
Start Date
02-Sep-2029
Ref Project

Relations

Effective Date
06-Jun-2022

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ISO 13975:2019 - Plastics -- Determination of the ultimate anaerobic biodegradation of plastic materials in controlled slurry digestion systems -- Method by measurement of biogas production
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Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 13975
Second edition
2019-04
Plastics — Determination of the
ultimate anaerobic biodegradation
of plastic materials in controlled
slurry digestion systems — Method by
measurement of biogas production
Plastiques — Évaluation de la biodégradabilité anaérobie ultime
des matériaux plastiques dans des systèmes de digestion de boue
contrôlés — Méthode par mesurage de la production de biogaz
Reference number
ISO 13975:2019(E)
©
ISO 2019

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ISO 13975:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Phone: +41 22 749 01 11
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO 13975:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Test and reference materials . 3
6 Apparatus . 3
7 Procedure. 4
7.1 General . 4
7.2 Preparation of inoculum . 4
7.3 Start-up of the test . 5
7.4 Measurement of biogas produced (see Annex A) . 5
7.5 Test duration . 5
7.6 Measurement of dissolved inorganic carbon (see Annex B) . 5
8 Calculation and expression of results . 5
8.1 Amount of biogas produced . 5
8.2 Amount of dissolved inorganic carbon .
...

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