We all know compostable poop bags are made of PLA+PBAT+Cornstarch. Today we are going to dive deep on one of the key component-PLA.
How is PLA produced?
PLA, also known as polylactic acid, or polyactide is obtained from renewable and natural raw materials such as corn. The starch (glucose) is extracted from the plants and converted into dextrose by the addition of enzymes. This is fermented by microorganisms into lactic acid, which in turn is converted into polylactide. Polymerisation produces long-linked molecular chains whose properties resemble those of petroleum-based polymers.
Pure PLA is produced from renewable raw materials and is not based on fossil raw materials, as is the case with ABS. This is very positive when you consider that our crude oil is a finite resource.
Is PLA Biodegradable and Compostable?
You might be wondering if PLA is both biodegradable and compostable. Let’s break it down:
Can PLA Break Down Naturally?
Yes, it can!
PLA (Polylactic Acid) is biodegradable, meaning it can naturally break down into simpler substances over time. This happens thanks to bacteria and other microorganisms that consume PLA, unlike traditional plastics that can persist in the environment for hundreds of years.
Can You Compost PLA?
Absolutely!
Composting is a process where organic materials decompose under controlled conditions. In industrial composting facilities, where temperature and humidity are carefully managed, PLA can break down in just a few months. Home composting is also possible, but the process might take longer.
Is All PLA the Same?
Not quite.
The biodegradability and compostability of PLA can vary. Some PLA products may take longer to decompose, depending on factors like thickness and the specific environment. In both special composting facilities and home compost piles, PLA will eventually break down into simpler organic compounds.
Composting PLA: What You Need to Know
What Does Composting PLA Mean?
Composting PLA means that it can break down into natural substances like organic matter. However, it’s not as simple as tossing it into your backyard compost bin. It requires specific conditions, such as the right temperature and the presence of microorganisms, to fully decompose.
Can You Compost PLA at Home?
Yes, but it’s a bit tricky.
Home composting of PLA requires careful attention to factors like temperature, moisture levels, and the balance of materials in your compost pile. With the right conditions, PLA can decompose into carbon dioxide and water faster than traditional plastics.
What About Industrial Composting?
In industrial composting facilities, PLA can break down in just a few months. These facilities have the equipment and conditions to accelerate the decomposition process, making it an environmentally friendly option that returns nutrients to the soil and reduces waste.
Will PLA Totally Disappear?
Mostly, but not entirely.
After decomposition, there may be small residues left, but these are generally harmless to people and the environment. This is a significant improvement over traditional plastics, which can persist for centuries.
PLA offers a more sustainable alternative to conventional plastics, aligning with environmentally conscious practices.
