I sure hope there was more to that article than the paragraph you posted.
Every surface in the ocean is covered with bacteria. That includes small pieces of plastic.
You don't seem to grasp what the P2O marine project is about. It is not and never was about cleaning up plastic from the ocean, although there was a great deal of discussion about that.
What the company said was that it wanted to put P2O processor on a ship and take that ship to islands that have a plastic disposal problem, put in to port, process the plastic waste on the island and sell the resulting fuel. The ship would then go to the next port and do the same thing.
If you are going to criticize the company's plans, please make sure you know what they are first.