Knowra Biodegradable plastic Biodegradable plastic Biodegradable plastic is plastic designed to be converted by microorganisms into simpler substances under specified environmental conditions. Its breakdown depends on conditions such as temperature, moisture, oxygen, and microbial activity.
Biodegradation : The breakdown of substances by living organisms, especially microorganisms. Microorganisms drive the biological conversion that distinguishes biodegradation from fragmentation or weathering.
Industrial composting : The controlled decomposition of organic waste in facilities operating at elevated temperatures and managed conditions. Many certified compostable plastics require facility conditions unavailable in home compost or the open environment.
Compostable plastic : Plastic that meets specified criteria for biological decomposition and disintegration under composting conditions. Compostability is a narrower, standards-based claim and does not guarantee breakdown in soil, seawater, or litter.
Life-cycle assessment : A method for estimating the environmental impacts of a product across its life stages. It compares biodegradability benefits with feedstock, manufacturing, transport, and waste-treatment impacts.
Polymer : A large molecule composed of repeating structural units called monomers. Plastic polymer structure determines how readily water and enzymes can access its chains.
Home composting : The small-scale decomposition of organic waste in household piles or bins under variable conditions. Home systems are generally cooler and less controlled than the conditions used to test industrially compostable plastics.
Oxodegradable plastic : Plastic containing additives that promote oxidative fragmentation, often without ensuring subsequent biodegradation. Fragmentation promoted by oxidation is not equivalent to microbial conversion into harmless end products.
Microplastics : Plastic particles smaller than five millimeters, including fragments and fibers released into the environment. Incomplete degradation can leave small plastic particles rather than fully mineralized products.
Hydrolysis : A chemical reaction that breaks bonds through the addition of water. Water can cleave susceptible polymer bonds before microorganisms assimilate the resulting fragments.
Bioplastics : Plastics that are biobased, biodegradable, or both, regardless of whether they come from renewable feedstocks. Biodegradable plastics are one subset; biobased origin alone does not ensure biodegradability.
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