That's nice and all but these are fungi release CO2 into the atmosphere just like burning it would. It's a bit counter-intuitive but burning it with carbon capture is less CO2 emitting.
Filtering out particles is obvious requirement and easier than filtering CO2. This is all a worse solution than to simply use less plastic. Taxing plastic out of existence is the real solution.
Taxing wasteful uses and protecting life saving uses (sanitization, hospitals, etc). Is the only solution. Treat every other approach as distractions by people who want to profit from the way things are.
Plastic is one of the greatest inventions of all time. But just like nuclear energy, it's also the most deadly to us if we are stupid.