• Title/Summary/Keyword: photobioreactor

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Mass Cultivation of Botryococcus braunii for the Advanced Treatment of Swine Wastewater and Lipid Production in a Photobioreactor (축산폐수의 고도처리 및 지질생산을 위한 Botryococcus branuii의 대량배양)

  • 이석준;김성빈;김희식;권기석;윤병대;오희목
    • Microbiology and Biotechnology Letters
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    • v.27 no.2
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    • pp.166-171
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    • 1999
  • This study was conducted to investigate the removal rate of nitrogen and phosphorus, and lipid production from a swine wastewater by Botryococcus braunii UTEX 572 in an outdoor photobioreactor. B. braunii successfully predominated in competition with bacteria and other algae, especially Oscillatoria, which were grown spontaneously in a secondary-treated swine wastewater, under the conditions of incubation temperature at $25^{\circ}C$ and increased inoculum amount at 287mg/l. There was a significant relationship between dry weight of B. braunii and absorbance of culture solution at 680mn(r2=0.967), suggesting that the latter is as good as the former commonly used for the measurement of algal biomass which is considerably time-consuming. The removal rates of COD, TOC, total nitrogen, and total phosphorus from the swine wastewater were 33.2$\pm$2.6% and 32.8$\pm$3.2, respectively, which showing no different between them. These results suggested that the mass cultivation of B. braunii in an outdoor photobioreactor could be used for the advanced treatment of swine wastewater and lipid production.

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Scale-up of Flat Panel Photobioreactor considering Hydrodynamics (수력학을 고려한 평판형 광생물 반응기의 스케일업에 관한 연구)

  • Kim, Gwang-Ho;Lee, Dong-Woon;Jeong, Sang-Hwa
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.17 no.1
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    • pp.48-56
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    • 2018
  • Due to the growing concerns of energy resource depletion and environmental destruction, the mass production of microalgae has been studied. The scale-up of a photobioreactor (PBR) is required for the mass production of biomass. In this paper, the geometric parameters and oxygen transfer rate (OTR) are considered, to scale up a flat panel photobioreactor (FP PBR). The PBR is designed using the goal-driven optimization (GDO) method to accomplish the scale-up. The local sensitivity of each output parameter with respect to the input parameter is analyzed through the design of experiment (DOE), and the design candidates are evaluated with the screening sampling method. The volumetric mass transfer coefficient is measured by the dynamic method.

Growth Analysis of Chlamydomonas reinhardtii in Photoautotrophic Culture with Microdroplet Photobioreactor System (미세액적 광생물반응기를 활용한 광독립영양배양에서 Chlamydomonas reinhardtii의 성장성 분석)

  • Sung, Young Joon;Kwak, Ho Seok;Choi, Hong Il;Kim, Jaoon Young Hwan;Sim, Sang Jun
    • Korean Chemical Engineering Research
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    • v.55 no.1
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    • pp.80-85
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    • 2017
  • Recently, microalgae which can produce high-value products have attracted increasing attention for biological conversion of $CO_2$. However, low photosynthetic efficiency and productivity have limited the practical use of microalgae. Thus, we developed microdroplet photobioreactor for the analysis of photoautotrophic growth of model alga, Chlamydomonas reinhardtii. $CO_2$ transfer rate was increased by integrating micropillar arrays and adjusting height of microchamber. These results were identified by change of cell growth rate and fluorescence intensity. Lastly, the photoautotrophic growth kinetics of C. reinhardtii in microdroplet photobioreactor were investigated under different $CO_2$ concentrations and light intensities for 96 hours. As a result, microdroplet photobioreactor was efficient platform for isolation and rapid evaluation of microalgal strains which have enhanced productivity of high-value products and growth performance.

Enhancing Photon Utilization Efficiency for Astaxanthin Production from Haematococcus lacustris Using a Split-Column Photobioreactor

  • Kim, Z-Hun;Park, Hanwool;Lee, Ho-Sang;Lee, Choul-Gyun
    • Journal of Microbiology and Biotechnology
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    • v.26 no.7
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    • pp.1285-1289
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    • 2016
  • A split-column photobioreactor (SC-PBR), consisting of two bubble columns with different sizes, was developed to enhance the photon utilization efficiency in an astaxanthin production process from Haematococcus lacustris. Among the two columns, only the smaller column of SC-PBR was illuminated. Astaxanthin productivities and photon efficiencies of the SC-PBRs were compared with a standard bubble-column PBR (BC-PBR). Astaxanthin productivity of SC-PBR was improved by 28%, and the photon utilization efficiencies were 28-366% higher than the original BC-PBR. The results clearly show that the effective light regime of SC-PBR could enhance the production of astaxanthin.

Design of Light Guide Plate for Photobioreactor (광생물 반응기를 위한 도광판 설계)

  • Park, Gi-Chan;Kim, Hun;Kim, Jong-Tye;Park, Jeong-Woo;Jeong, Sang-Hwa;Park, Jong-Rak
    • Journal of the Korean Society for Precision Engineering
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    • v.28 no.2
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    • pp.133-139
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    • 2011
  • We have performed optical design of light guide plates (LGPs) for a photobioreactor by using an illumination design tool. An LGP having light emitting diodes (LEDs) as a light source on the four sides was designed by optimizing the distribution of LGP patterns and design of another LGP, on top of which sunlight was focused by a Fresnel lens, was executed. Finally, a hybrid-solar-and-LED-lighting scheme was described. Detailed design process and optical performances of the designed LGPs are presented.

Effect of Light on Growth of Chlorella sp. HA-1 in Large-scale Photobioreactors for Biological $CO_2$ Fixation (생물학적 $CO_2$ 고정화를 위한 스케일-업된 광생물반응기에서 Chlorella sp. HA-1의 성장에 미치는 빛의 영향)

  • 이재영;권태순;김호정;양지원
    • KSBB Journal
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    • v.18 no.4
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    • pp.340-345
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    • 2003
  • Feasibility of large-scale photobioreactors for biological CO$_2$ fixation was investigated using Chlorella sp. HA-1. Generally, as the volume of photobioreactor increased, the CO$_2$ fixation rate decreased because of a lower illumination efficiency in large-scale than in small-scale photobioreactors. Though controlling the arrangement and the number of light source, the maximum CO$_2$ fixation rates that could be achieved were 530 and 357 gCO$_2$/㎡day for 40 L and 188 L photobioreactor, respectively, which was higher than the CO$_2$ fixation rate of lab-scale photobioreactor.