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06 | 2010

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From Science and

From Science and Research material passed through the sieves is considered disintegrated. The degree of disintegration (D) is therefore: Mi – Mr D(%) = _______ x 100 Mi Where: Fig. 2. Preparation of organic waste Fig. 3. Adding samples Mi Mr is the initial dry mass of the test material; is the mass of the dry residues recovered by sieving. Full test results according to the formula above are presented on table 3. Conclusion As indicated by results compiled in table 3, shopping carrier bags from Carrefour and those produced by Bioerg Sp. z o.o. from Dabrowa Górnicza, as well as samples from PLA posses very high disintegration potential (degree of disintegration of 98-100%). Films produced from polyethylene with addition of TDPA (oxodegradable additive by EPI) did not disintegrate. This signifies that PE films with TDPA are resistant to bacteria and fungi enzymes and do not disintegrate in a timeframe essential for industrial composting [3]. Fig. 4. Reactors with samples mixed with organic waste Fig 5. Sieving of samples residues after 3 months References: 1. Żakowska H.: “Packaging waste recycling systems within the framework of environmental legislation” / “Systemy recyklingu odpadów opakowaniowych w aspekcie wymagań ochrony środowiska”, Wydawnictwo Akademii Ekonomicznej w Poznaniu, Poznań 2008. 2. EN 14806: 2005 Packaging - Preliminary evaluation of the disintegration of packaging materials under simulated composting conditions in a laboratory scale test. 3. Żakowska H.: Evaluation of the disintegration of packaging materials under simulated composting conditions in a laboratory scale test, Centre of Polymer and Carbon Materials Polish Academy of Sciences, Polish Packaging Research and Development Centre, 3rd Conference „The Future Of Biodegradable Packaging”, 28 September 2010, Warsaw. Table 3. Results of disintegration degree of packaging materials in simulated organic composting conditions. Fig. 6. Sieves used to separate leftover samples and compost obtained from organic waste. Sample Packaging material Initial dry mass [g] Mass of dry residue [g] Mass of dry residue [g] Fig. 7. Residues from samples 1 and 2 Fig. 8. Residues from samples 3 and 4 1. Shopping bags introduced on the Polish 9,000 0,150 98,33 2. market by Carrefour, certified by DIN CERTCO compostable mark 9,000 0,170 98,11 3. Polyethylene shopping carrier bag with 9,008 9,008 0 4. several percent addition of chemical substance called TDPA (Totally 9,009 9,009 0 Degradable Plastic Additive, an oxodegradable additive by EPI) 5. Biodegradable shopping carrier bag 9,028 0 100 6. produced by Bioerg Sp. z o.o. from Dabrowa Górnicza, certified by DIN 9,001 0 100 CERTCO compostable mark 7. Polylactide (PLA) 9,050 0 100 8. 9,021 0 100 9. Polylactide (PLA) 9,006 0 100 10. 9,060 0 100 46 bioplastics MAGAZINE [06/10] Vol. 5

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