There are many different types of plastic and they have surprisingly different molecular structures. Enzymes are remarkably specific catalysts, so an enzyme tha

There are many different types of plastic and they have surprisingly different molecular structures. Enzymes are remarkably specific catalysts, so an enzyme that eats PET [1] can’t eat another type of plastic, like HDPE [2]. So one solution could be to engineer an enzyme that can’t eat the liner material. I’m not sure if HDPE would make a good liner material or not, but just as an example, the differences in molecular structure between PET and other plastics are big enough that it would take an array of different enzymes to eat them all. 1. https://en.m.wikipedia.org/wiki/Polyethylene_terephthalate https://en.m.wikipedia.org/wiki/Polyethylene_terephthalate 2. https://en.m.wikipedia.org/wiki/Polyethylene https://en.m.wikipedia.org/wiki/Polyethylene