Abstract
The ever increasing plastic production and the challenges of low recycling quota, microplastic and plastic in the ocean is summarized as plastic crisis, asking for new technology for end-of-life polymer use. We present a value chain for plastic waste developed in the EU project P 4 SB. Plastic is hydrolysed to its monomers by engineered enzymes and the monomers are the feedstock for engineered microbes to synthesise products of value. This upcycling adds incentives for increased polymer recycling.