Bioplastics offer an alternative to traditional petroleum-based plastics, but not all bioplastics are created equal. Understanding the difference between "biodegradable" and "compostable," especially concerning materials like PLA (polylactic acid), is crucial for proper disposal in New Zealand.

Biodegradable simply means a material can break down into natural substances over time. However, this breakdown can require specific conditions not always present in landfills or home compost bins. Many "biodegradable" plastics only decompose in industrial composting facilities with high heat and controlled environments.

"Compostable" implies biodegradability under specific conditions. "Home compostable" bioplastics, certified to Australian/New Zealand Standard AS 5810, are designed to break down in your home compost bin. Look for certification logos to ensure they meet these standards. Commercial composting, following AS 4736, requires higher temperatures and processing, suitable for some PLA-based products. Check with your local council for their specific composting guidelines. ''

Not all PLA is created equal! Some PLA products are only commercially compostable and won't break down effectively in your home compost. If you place commercially compostable items in your home compost or typical landfill, they might act like conventional plastic, taking a long time to decompose and potentially contaminating other compostable materials.