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I think there are means that will get them safe enough to use again, say wet autoclaving. However, the environmental impact (say fuel or electricity to raise steam) will probably far outweigh the benefits of the small volume of recycled plastic here.

The energy required to clean and sterilize, the effort required for quality assurance, and the residual risk towards the impact to human health must be balanced against the environmental benefits of a recycled plastic stream.

There are definitely low hanging fruit in this space. However, it is worth noting that the cost of a single human life is worth many, many tons of recycled plastic.

Interesting work!

What kind of waste and what level of contamination is processed by your solution?

For instance, tubing, connectors and capsule filters that see "weak" sterile chemicals like WFI, phosphate buffers, citrate buffers, dilute NaOH, are probably handled pretty easily. The opposite might be the case for single-use bioreactors and perfusion hollow fiber cartridges that come in contact with recombinant cells.