BS ISO 13975:2019 – TC:2020 Edition
$134.27
Tracked Changes. Plastics. Determination of the ultimate anaerobic biodegradation of plastic materials in controlled slurry digestion systems. Method by measurement of biogas production
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 46 |
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:
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natural and/or synthetic polymers, copolymers or mixtures;
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plastic materials that contain additives such as plasticizers, colorants, or other compounds;
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water-soluble polymers.
It does not apply to materials which exhibit inhibitory effects on the test microorganisms at the concentration chosen for the test.
Inhibitory effects can be determined by an inhibition test (e.g. ISO 13641-1 or ISO 13641-2).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 26 | National foreword |
| 30 | Foreword |
| 31 | Introduction |
| 33 | 1 Scope 2 Normative references 3 Terms and definitions |
| 35 | 4 Principle 5 Test and reference materials 6 Apparatus |
| 36 | 7 Procedure 7.1 General 7.2 Preparation of inoculum |
| 37 | 7.3 Start-up of the test 7.4 Measurement of biogas produced (see Annex A) 7.5 Test duration 7.6 Measurement of dissolved inorganic carbon (see Annex B) |
| 38 | 8 Calculation and expression of results 8.1 Amount of biogas produced 8.2 Amount of dissolved inorganic carbon 8.3 Calculation of percentage biodegradation |
| 39 | 9 Expression and interpretation of results 10 Validity of results 11 Test report |
| 40 | Annex A (informative) Examples of test systems |
| 42 | Annex B (informative) Example of apparatus for measurement of biogas dissolved in slurry |
| 43 | Annex C (informative) Example of a biodegradation curve |
| 44 | Annex D (informative) Table of water vapour pressures at various temperatures |
| 45 | Bibliography |
