Supporting material of the article “An environmental and economic assessment of bioplastic from urban biowaste. The example of polyhydroxyalkanoate”

System boundaries and detailed life cycle inventory.

The life cycle inventory of the following processes is described, included the uncertainty distribution of all the parameters resulted from a detailed literature review:

- Economic data
- Current municipal food waste (source separated and residual) and sewage sludge management in the 5 clusters
- Municipal food waste and sewage sludge composition (chemical composition and low heating value) in the 5 clusters
- Municipal food waste collection
- Biorefinery producing PHA
- Anaerobic digestion (AD) with Pre-treatment of source-separated municipal food waste
- Composting
- Dewatering of the digestate
- Treatment of the reject water from the dewatering
- Incineration with energy recovery
- Mechanical biological treatment: stabilization and pre-treatment
- Landfilling
- Use-on-land: compost, digestate, and raw sewage sludge
- Avoided fertilizers
- Consumed and avoided marginal energy (electricity, space heating, diesel)
- Transport
- Salary
- PHA from first-generation biomass
- Fossil plastic

Supporting Material B

LCA and LCC results per impact category, per process and per contributing flow.