The bags are silly. Imagine, instead, a pipe of used oil barrels on the bottom, clear plastic on the top. Adjust pipe leanth to life cucly of algae, and flow rate.
Input salt water, algae starters, and emissions from local coal-fired plant at one end.
pull pond scum from other end, and water - feed water bach to front of loop.
squeeze pond scum, allow oil and water to seperate.
Feed water and dry debris back to front of loop.
Process oil.
Repeat.
Inputs - salt water, waste gasses, starter stock.
Output - diesel.
Sure, I can see that. Why not?
Is anybody trying it?