NBN EN ISO 14852:2018

Determination of the ultimate aerobic biodegradability of plastic materials in an aqueous medium - Method by analysis of evolved carbon dioxide (ISO 14852:2018)

WITHDRAWN

About this standard

Languages
German, English and French
Type
NBN
Standards committee
CEN/TC 249
Status
WITHDRAWN
Publication date
30 October 2018
Replaces
NBN EN ISO 14852:2004
Replaced by
NBN EN ISO 14852:2021
ICS Code
83.080.01 (Plastics in general)
Withdrawn Date
07 July 2021

About this training

Summary

This document specifies a method, by measuring the amount of carbon dioxide evolved, for the determination of the degree of aerobic biodegradability of plastic materials, including those containing formulation additives. The test material is exposed in a synthetic medium under standardized laboratory conditions to an inoculum from activated sludge, mature compost or soil under aerobic, mesophilic conditions.
If an unadapted activated sludge is used as the inoculum, the test result can be used to assess the aerobic biodegradation processes which occur in a waste water treatment plant environment. If a mixed or pre-exposed inoculum is used, the method can be used to investigate the potential biodegradability of a test material.
The conditions used in this document do not necessarily correspond to the optimum conditions allowing maximum biodegradation to occur, but this test method is designed to measure the biodegradation of plastic materials and give an indication of their potential biodegradability.
The method enables the assessment of the biodegradation to be improved by calculating a carbon balance (optional, see Annex C).
The method applies to the following materials:
— natural and/ or synthetic polymers, copolymers or mixtures thereof
— plastic materials which contain additives such as plasticizers, colorants or other compounds
— water-soluble polymers
— materials which, under the test conditions, do not inhibit the microorganisms present in the inoculum. Inhibitory effects can be determined using an inhibition control or by another appropriate method (see, for example, ISO 8192[1]). If the test material is inhibitory to the inoculum, a lower test concentration, another inoculum or a pre-exposed inoculum can be used.