Enhanced productivity of microalgae by the designed vertical flow in a small-scale cultivation system = 소규모 배양 시스템에서 설계된 수직 흐름에 의한 미세조류의 생산성 향상

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dc.contributor.advisorKim, Do Hyun-
dc.contributor.authorRana, Maheen-
dc.description학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2019.2,[vii, 38 p. :]-
dc.description.abstractMicroalgae are one of the most promising renewable energy sources, which utilize carbon dioxide, water and sunlight only in order to produce valuable bio-product. Different from other biomass, microalgae have advantages of high biomass productivity and no adverse effect on food supply. Light intensity, one of the major factors in the cultivation of microalgae, decreases with the depth of medium. Therefore, vertical mixing is necessary to expose more algal cells to sunlight. It is important as vertical mixing determines the probability by which cells are exposed to light. In this study, we demonstrated the effect of vertical mixing on algal cell growth by employing a structure in a small-scale experiment. Experiments were performed in a beaker incubator using a delta wing, modified delta wing, and a rotor design for vertical flow. On Day 8, the dry cell weight (DCW) was 0.53 g/L for delta wing (vertical velocity = 0.00577 m/s), 0.55 g/L for modified delta wing (vertical velocity = 0.00589 m/s), and rotor showed 0.87 g/L of DCW (Vertical velocity = 0.0076 m/s). DCW was 0.44 g/L for the control beaker incubator with the vertical flow of 0.0053 m/s. These correspond to 12%, 25.0%, and 56.6% increase in volumetric biomass productivity for delta wing, modified delta wing, and rotor, respectively, as compared to the control. Numerical simulation was performed for the rotor and the control beaker incubators using computational fluid dynamic (CFD) software, ANSYS CFX 18.0.-
dc.subjectmicroalgae▼aopen raceway pond▼avertical mixing▼acomputational fluid dynamics▼adelta wing-
dc.subject미세조류▼a레이스웨이 폰드▼a수직 혼합▼a수치 모사▼a델타 윙-
dc.titleEnhanced productivity of microalgae by the designed vertical flow in a small-scale cultivation system = 소규모 배양 시스템에서 설계된 수직 흐름에 의한 미세조류의 생산성 향상-
dc.description.department한국과학기술원 :생명화학공학과,-
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