NBN ISO 13975:2021

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


About this standard

Publication date
28 May 2021
ICS Code
83.080.01 (Plastics in general)

About this training


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).