ISO 13975:2019

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
• ICS: 83.080.01 - Plastics in general
• Technical Committee: ISO/TC 61/SC 14 - Environmental aspects
• Drafting Committee: ISO/TC 61/SC 14/WG 2 - Biodegradability
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Jan-2024
• Completion Date: 15-Jan-2024

Relations

• Revises: ISO 13975:2012 - Plastics — Determination of the ultimate anaerobic biodegradation of plastic materials in controlled slurry digestion systems — Method by measurement of biogas production
• Effective Date: 15-Dec-2017

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)

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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 .
...