BS EN ISO 14855-1:2012
$142.49
Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions. Method by analysis of evolved carbon dioxide – General method
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 32 |
This part of ISO 14855 specifies a method for the determination of the ultimate aerobic biodegradability of plastics, based on organic compounds, under controlled composting conditions by measurement of the amount of carbon dioxide evolved and the degree of disintegration of the plastic at the end of the test. This method is designed to simulate typical aerobic composting conditions for the organic fraction of solid mixed municipal waste. The test material is exposed to an inoculum which is derived from compost. The composting takes place in an environment wherein temperature, aeration and humidity are closely monitored and controlled. The test method is designed to yield the percentage conversion of the carbon in the test material to evolved carbon dioxide as well as the rate of conversion.
Subclauses 8.6 and 8.7 specify a variant of the method, using a mineral bed (vermiculite) inoculated with thermophilic microorganisms obtained from compost with a specific activation phase, instead of mature compost. This variant is designed to yield the percentage of carbon in the test substance converted to carbon dioxide and the rate of conversion.
The conditions described in this part of ISO 14855 may not always correspond to the optimum conditions for the maximum degree of biodegradation to occur.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Principle |
| 11 | 5 Test environment 6 Reagents 6.1 TLC (thin-layer chromatography) grade cellulose 6.2 Vermiculite |
| 12 | 7 Apparatus |
| 13 | 8 Procedure 8.1 Preparation of the inoculum 8.2 Preparation of test material and reference material |
| 14 | 8.3 Start-up of the test 8.4 Incubation period |
| 15 | 8.5 Termination of the test 8.6 Use of vermiculite |
| 16 | 8.7 Recovery procedure and carbon balance when using vermiculite |
| 17 | 9 Calculation and expression of results 9.1 Calculation of the theoretical amount of carbon dioxide 9.2 Calculation of the percentage biodegradation 9.3 Calculation of loss in mass 9.4 Expression of results |
| 18 | 10 Validity of results 11 Test report |
| 19 | Annex A (informative) Principle of test system |
| 20 | Annex B (informative) Examples of graphical representation of carbon dioxide evolution and biodegradation curves |
| 22 | Annex C (informative) Example of mass loss determination |
| 24 | Annex D (informative) Round-robin testing |
| 25 | Annex E (informative) Examples of forms |
| 28 | Bibliography |
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ISO 14855-1:2012
Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions — Method…
