However, unlike any other type of photo-bioreactor, it uses an internal column to house the upward gas flow. As the gas leaves the center column, it causes an upward flow in the algae and water that fills the column allowing it to over-flow the center column and return to the bottom to be circulated again as more gas enters the center column [7]. Illustration "C" shows an example of a "Split-Column Airlift" PBR [7]. This PBR works in the same way that the Internal Loop Airlift PBR does except that the vertical flow is on one side of the column, divided by a flat wall of the column [7]. Illustration "D" is an example of an "External-Loop Airlift" PBR [7]. Like the "It also works the same way as the Internal Loop Airlift in respect to the flow. However, the flow back down to the bottom of the column takes place in an external tube connecting from the top to the bottom of the
However, unlike any other type of photo-bioreactor, it uses an internal column to house the upward gas flow. As the gas leaves the center column, it causes an upward flow in the algae and water that fills the column allowing it to over-flow the center column and return to the bottom to be circulated again as more gas enters the center column [7]. Illustration "C" shows an example of a "Split-Column Airlift" PBR [7]. This PBR works in the same way that the Internal Loop Airlift PBR does except that the vertical flow is on one side of the column, divided by a flat wall of the column [7]. Illustration "D" is an example of an "External-Loop Airlift" PBR [7]. Like the "It also works the same way as the Internal Loop Airlift in respect to the flow. However, the flow back down to the bottom of the column takes place in an external tube connecting from the top to the bottom of the