- · Door to door collection of food waste is required.
- · Compostable bags need to be used for this collection.
- · Disposable nappies were a huge problem, accounting for 2.5% of all waste.
- · Compostable diapers could make a large contribution to compost production, but they were currently twice the price of the petro-diapers.
The machines are tuned to the key wavelengths reflected or transmitted by each polymer and digital images taken at these wavelegths are analysed pixel-by-pixel so that for a bottle for example, the cap, label and body polymers are identified and recorded. Problems arise with black polymers (no reflection), and labels made of paper prevent the underlying polymer being seen. PLA and PET bottles which look identical can be separated easily. The software in use can be updated for every new polymer once samples have been tested.
Asked how multilayer bottles or films would be treated, Ms Janasa said the majority polymer would take precedence.