EXPLAINED: Biodegradable, compostable and bio-plastics.

29. November 2018 | Plastics, Waste | via Axiongroup.co.uk

 

Plastic materials that at end of life can completely break down naturally and disappear harmlessly may sound like the ideal answer. People hear terms such as ‘biodegradable’, ‘bio-plastic’ and ‘compostable’ and assume that these plastics are more ‘environmentally-friendly’. However, the reality is not so simple, as Richard McKinlay explains in an article on Axiongroup.co.uk

The main issue here is a lack of understanding of the nature of compostable or biodegradable plastics and what bio-plastics are; their specific applications and the specialist treatment process needed to deal with these materials.

Bioplastics are made using renewable feedstocks rather than being derived directly from oil. Bioplastics can be used in the production of conventional polymers that can be recycled, such as recycled PET, or biodegradable polymers such as PLA.

It may seem obvious that selecting a bioplastic is the most sustainable option. However, although there is a clear benefit from not depleting a non-renewable source, we need to consider that many petrochemicals are a by-product of the oil refining process. While we still live in an economy that is so heavily reliant on oil, it may be better to make use of its by-products rather than let them go to waste.