This is a commonly confused item! Bioplastics are plastics made from organic materials such as corn starch and often contain polylactic acid (PLA). PLA has similar properties to PET and looks like ordinary plastic. This can break down in certain facilities but not in the composting facilities near us. The closest industrial composting facility that accepts corn starch PLA bioplastics is in Los Angeles. Any fiber-based foodware is generally okay. The rule of thumb is if it looks like plastic and has a compostable label, it should go in the trash. If it looks like it is made from paper, wood, or bamboo, it can go in the compost.
BPI-certified compostable bags are the exception as they are allowed by our compost processor to help collect food scraps.
The ASTM D6400 or D6868 standard that BPI- and CDM-compostable products have is outdated. The standard was set in the 1990s, and they do not align with the reality of what many compost facilities require. The ASTM D6400 or D6868 certification requires that the material breaks down 90% within 90-180 days, whereas Recology's compost facilities have a 60-90 day breakdown period. At Recology facilities, these type of materials may break down a bit, but not all the way.
Recology's compost facility is striving to gain an OMRI certification, which does not allow bioplastics in the final product. The certification guarantees clean products for organic farmers, agricultural feedstocks, and other end users. Essentially, a cleaner product will have an impact on the health of the community, as we eventually consume the food that used the compost that we produced.