That's a good point. Let me clarify. They won't have to pay for a feedstock. They may have to pay to ensure that there isn't damage to turbines, but i would have to think that turbines would be sturdy enough to cope w/ some particulate matter (or that wear and tear would be factored into maintenance costs).

What i'd also be interested in hearing is whether there's a drop in efficiency if particulate matter increases, and if so, what kind of curve fits the inefficiency