Compostable bioplastics are biodegradable plastics that are specifically designed to break down in a short period of time under conditions similar to those found in a composting facility. This means that they will break down into organic matter that can be used as a nutrient-rich soil amendment. In order for a bioplastic to be considered compostable, it must meet certain criteria established by standard EN 13432 or ASTM D 6400. These standards require that the bioplastic break down into carbon dioxide, water, inorganic compounds, and biomass within a defined period of time under controlled composting conditions.