Agreed. There are a number of chlorophytes that contain large oil-filled vacuoles. In other words, this has promise.
The hundreds of thousands of jobs is likely wrong, as this is a mix between aquaculture and an automated laboratory process in real life.
Wish I had the link I followed months ago, but it showed a project that was inside, with long plastic tubes, about a foot in diameter, filled with water and growing algae. The tubes were arranged horizontally and stacked very high, showing how vertical arrangements could produce a lot of output and not require so much surface area.