The video above explains the design of a patented bioreactor from GS CleanTech. It illustrates how a very fancy and hightech C02 bioreactor might work. Below is an example of a bioreactor in the real world that is actually being used. It is not as fancy as the CleanTech design and the harvesting of the algae seems less efficient, nontheless it is a real world example of the concept and has been successful enough that the project is being expanded. These videos give a lot of emphasis on the environmental aspects of the technology, which is not as interesting as a cost effective source of fuel.