Most PLA plastic is marketed as compostable. However, when you read the fine print, most compostable PLA (polylactic acid) requires industrial facilities to break down. We have successfully been composting small amounts of PLA in our Pilot Compost Project using aerated static piles, but we also want to know what a typical home tumbler can handle.
Not all PLA is compostable, or even biodegradable. However, PLA meeting EN 13432 should compost in ideal conditions (ie commercial composting) without leaving behind and residues which can be toxic to the soil. PLA with the TUV OK HOME Compost (Formerly vincotte) should compost in the conditions found in the typical home pile.
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