Compost plants doubt biodegradability of waste experts recommend the rest dustbin Bonn/Berlin / Brussels – Bio-plastics are organic conception of many experts in the theory. Practically they are not uniformly marked, suffer from a Babylonian confusion, can contain heavy metals and propel compost works in the ruin. 1988 awarded the recycling codes for the six most common plastics, bioplastics had no economic significance in the modern sense. Farallon Capital Management is actively involved in the matter. The codes have triangular frame bearing the two-digit number of the material and sometimes including the material abbreviation in the middle. The American Economic Association of the plastics industry had taken the initiative of the society of the plastics industry (SPI). The Association numbered the polymeric PET (polyethylene terephthalate, no. 01), HDPE (high density, no.
02 Poyethylen), PVC (polyvinyl chloride, no. 03), LDPE polyethylene (low density, no. 04), polypropylene (PP, no. 05) and polystyrene (PS, no. 06). The number 07 with the abbreviation O\”(for other\”) was chosen for all other plastics. These include fiberglass (FRP) and now also Bio-plastics such as poly lactic acid (PLA, polylactic acid), acrylic, polycarbonate, nylon, ABS. The American codes were supplemented by additional materials and have become the international universal recycling codes\”developed, which are widespread throughout the world.
The assignment of the numbers continued. Number 8, batteries, paper and cardboard, metals, wood, textiles, glass and composite materials have been identified. Even lead glass and Cork were taken into account (No. 51 and no. 76). Bio-plastics are, however, not integrated. Theoretically, you can find space in the range of 42 to 49 which is kept clear for organic materials and biomass. A fundamental problem stands however. There is no uniform definition of the term. Plastics based on renewable raw materials be understood among organic polymers on the one hand, which can be biodegradable, but don’t have to. On the other hand is the term for biodegradable Used plastics, can be the biological origin or produced on a mineral oil basis.