BS EN ISO 14851:2004:2008 Edition
$142.49
Determination of the ultimate aerobic biodegradability of plastic materials in an aqueous medium. Method by measuring the oxygen demand in a closed respirometer
| Published By | Publication Date | Number of Pages |
| BSI | 2008 | 24 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | National foreword |
| 4 | Foreword |
| 5 | 1 Scope 2 Normative references |
| 6 | 3 Definitions ultimate aerobic biodegradation activated sludge concentration of suspended solids in an activated sludge biochemical oxygen demand theoretical oxygen demand total organic carbon dissolved organic carbon lag phase maximum level of biodegradation |
| 7 | biodegradation phase plateau phase pre-exposure pre-conditioning 4 Principle 5 Test environment |
| 8 | 6 Reagents 6.1 Distilled or deionized water 6.2 Test medium |
| 9 | 6.3 Pyrophosphate solution 6.4 Carbon dioxide absorber, |
| 10 | 7 Apparatus 7.1 Closed respirometer, 7.2 Analytical equipment for measuring total organic carbon (TOC) and dissolved organic carbon (DOC) 7.3 Analytical equipment for measuring nitrate and nitrite concentrations 7.4 Centrifuge, 7.5 Analytical balance 7.6 pH meter 8 Procedure 8.1 Test material 8.2 Reference material |
| 11 | 8.3 Preparation of the inoculum |
| 12 | 8.4 Test Table 1 Final distribution of test and reference materials |
| 13 | 9 Calculation and expression of results 9.1 Calculation 9.2 Expression and interpretation of results 10 Validity of results |
| 14 | 11 Test report |
| 15 | Annex A (informative) Theoretical oxygen demand (ThOD) A.1 Calculation of the ThOD A.2 A.3 Example: Blend of polyethylene/starch/glycerol Annex B (informative) Correction of BOD values for interference by nitrification Correction of BOD values for interference by nitrification B.1 Influence of nitrification |
| 16 | B.2 Example |
| 17 | Annex C (informative) Principle of a closed manometric respirometer Principle of a closed manometric respirometer Figure C.1 Schematic drawing of a manometric respirometer |
| 18 | Annex D (informative) Two-phase closed-bottle version of the respirometric test Two-phase closed-bottle version of the respirometric test D.1 Principle D.2 Special apparatus Incubation bottles: Oxygen electrode, Magnetic stirrer or shaking device D.3 Procedure |
| 19 | D.4 Calculation of results |
| 20 | Annex E (informative) Example of the determination of a carbon balance Example of the determination of a carbon balance E.1 Principle E.2 Test procedure E.3 Calculation of the carbon balance |
| 21 | E.4 Example: Carbon balance of poly(¶-hydroxybutyrate) Annex F (informative) Example of a determination of the amount of water-insoluble polymer remaining at th… Example of a determination of the amount of water-insoluble polymer remaining at th… |
| 22 | Annex G (informative) Bibliography Bibliography |
| 23 | Annex ZA (normative) |
