Grow it on sewage.
Actually a good initial application. Then the process can be improved further. If the cost benefit in fuel production is only slightly better than crude refining, but as a method of waste treatment is cost effective, then consider the extracted oil to be a byproduct stream - still a revenue stream to recoup the cost of sewage treatment.
Anyhow, the oil from algae is about on the level of light sweet crude.
This is a very special strain of algae. It is not pond scum. It cannot be grown in open ponds, or “on” sewage. The process is not new. The only innovation here appears to be that they have constructed a continuous stream, however small.