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제시비톡 ( Jessie P. Bitog ),이인복 ( In-bok Lee ) 한국농공학회 2011 한국농공학회 학술대회초록집 Vol.2011 No.-
Photobioreactors has been widely considered to be the most effective and efficient growth vessel for mass production of photosynthetic microorganisms such as microalgae for various purposes. However, practicable photobioreactor designs are still in the process of development. This can be observed from the rapid increase of numerical simulation studies on the design and development photobioreactors. Among the numerical methods, a computational fluid dynamic (CFD) technique holds the greatest potential considering its wide and practical application in multiphase flow systems. In this study, particle tracking technique of CFD was used to evaluate the performance of a 30L bubble type photobioreactor where the cells are considered as fine particles. The commercial CFD model Flow-3D was used in all tests. Flow-3D allows the release of particles from a user-defined source. A circular plane was defined as a source of particles in any part of the computational grid, with a given generation rate expressed in particles/second. The particles are passively transported by the flow and they do not interact with each other or with the fluid. The particles are assumed as spherical and defined by properties such as diameter and density. The locations of the particles were continuously tracked and the average amounts of light received by the particles were theoretically computed. The average growth of the cells was then computed based on the amount of light intensity distribution in the photobioreactor utilizing the Lambert-Beer Law proposed earlier by Lou and Al- Dahhan (2003). Results of the simulation study on growth of cells revealed good agreement with the growth of cells grown in a 30L photobioreactor.