Plastics. Determination of the ultimate anaerobic biodegradation of plastic materials in an aqueous system. Method by measurement of biogas production

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

02-19-2018

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Procedure
8 Calculation and expression of results
9 Validity of results
10 Test report
Annex A (informative) - Example of apparatus
        for determining the amount of biogas produced
        by measuring the increase in gas pressure
Annex B (informative) - Example of apparatus for
        determining volumetrically the amount of
        biogas produced
Annex C (informative) - Example of a biodegradation curve
Annex D (informative) - Examples of data sheets for
        anaerobic biodegradability tests
Annex E (informative) - Table of water vapour pressures
        at various temperatures
Annex F (informative) - Calculation of theoretical carbon
dioxide (ThCO[2]) and theoretical methane (ThCH[4])
        production
Annex G (informative) - Example of determination of recovery rate
Annex H (informative) - Example of a workflow scheme
Bibliography

Defines a method for the determination of the ultimate anaerobic biodegradability of plastics by anaerobic microorganisms.

This International Standard specifies a method for the determination of the ultimate anaerobic biodegradability of plastics by anaerobic microorganisms. The conditions described in this International Standard do not necessarily correspond to the optimum conditions for the maximum degree of biodegradation to occur. The test calls for exposure of the test material to sludge for a period of up to 90 d, which is longer than the normal sludge retention time (25 to 30 d) in anaerobic digesters, although digesters at industrial sites can have much longer retention times.

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 e.g. ISO 13641). If the test material is inhibitory to the inoculum, a lower test concentration, another inoculum or a pre-exposed inoculum can be used.

Committee	PRI/21
DevelopmentNote	2017 Edition incorporates corrigendum to BS ISO 14853. Renumbers and supersedes BS ISO 14853. Supersedes 15/30321718 DC. (03/2018)
DocumentType	Standard
Pages	38
PublisherName	British Standards Institution
Status	Current

Standards	Relationship
EN ISO 14853:2017	Identical
ISO 14853:2016	Identical

ISO 11923:1997	Water quality — Determination of suspended solids by filtration through glass-fibre filters
ISO 11734:1995	Water quality — Evaluation of the "ultimate" anaerobic biodegradability of organic compounds in digested sludge — Method by measurement of the biogas production
ISO 8245:1999	Water quality Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
ISO 7827:2010	Water quality Evaluation of the "ready", "ultimate" aerobic biodegradability of organic compounds in an aqueous medium Method by analysis of dissolved organic carbon (DOC)

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BS EN ISO 14853:2017

Current

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Standards Referencing This Book

Category

Subcategory

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