You can now build your own open-source photobioreactor, which is a great way to learn what on earth a "photobioreactor" is

Do you know how important it is that we finally have an open-source photobioreactor design we can make at home? If you do, can you tell me? Someone has created a photobioreactor which you can build and 3D print in your own home, and I mean, it looks really cool. But I have zero idea what this thing actually does. Still, if a photobioreactor is something you need in your daily life, then this project is the perfect fit.