Design and Applications of High-Density Algal Photobioreactors

초록

Lack of high-density algal photobioreactors (PBRs) has been a limitation in exploiting the biotechnological potential of algae. Recent developments of lighting systems have made the development of a high-density PBR possible. We have calculated theoretical values of gas mass transfer requirements and light intensity requirements to support high-density algal cultures and a prototype PBR has been designed based on these calculations. A cell concentration of over 2x109 cells/mL (over 6.6% v/v), cell doubling times as low as 12 hours, and an oxygen production rate as high as 10 mmole/(L.hr) were achieved. These PBRs can be applied in various algal biotechnology areas, such as production of valuable bioactive compounds, wastewater treatments, and carbon dioxide fixation.