• Title/Summary/Keyword: scale-up technology

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A Study on the Domestic Scale-up Policy Direction through the Analysis of Scale-up Support Policy for Global Startups (글로벌 창업기업 스케일업(Scale-up) 지원 정책 분석을 통한 국내 스케일업 정책 방향에 관한 연구)

  • Hong, Dae Ung;Jun, Byung Hoon
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.14 no.6
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    • pp.11-27
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    • 2019
  • The second venture "boom" diffusion strategy can be confirmed to be focused only on financing investment and finance, including achieving 5 trillion won annually in new venture investments, creating 20 unicorns, activating M&As and creating dynamic recovery markets. Of course, existing studies show that the fund is a very important policy for corporate growth, but various policy support will be needed to effectively scale up. To overcome these limitations, the scale-up support policies already in operation are analyzed by introducing scale-up policies in advanced countries such as the U.S. and Britain. It also aims to analyze domestic scale-up policies to draw up implications for establishing more effective scale-up policies. Academically, we are very lacking in research on scale-up at home and abroad, and we propose suggestions through this comparative study of policy cases to contribute to the promotion of various studies related to the scalability aspects of future research topics related to scale-up.

Effect of Agitation, Aeration and Scale-up on Mycelial Morphology During Liquid Culture of Ganoderma lucidum (영지의 액체배양 중 균사형태에 미치는 통기.교반의 영향 및 Scale-up)

  • Lee, Hak-Su;Lee, Ki-Young;Choi, Sang-Yun;Lee, Shin-Young
    • KSBB Journal
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    • v.26 no.4
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    • pp.357-364
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    • 2011
  • This study was carried out to investigate the effects of agitation, aeration and scale-up on the mycelial growth, exo-polysaccharide (EPS) production, and mycelial morphology in the liquid culture of Ganoderma lucidum. A correlation between roughness and operating variables was also studied to scale-up the liquid culture of G. lucidum in a jar fermenter. When the agitation speed or aeration rate increased, the morphological form was changed from rough pellet to smooth pellet form. Increase of the agitation and aeration reduced the mycelial roughness. On the other hand, in the case of pellet size, it was not affected by aeration. The higher EPS production was obtained at approximately 17% of roughness and mycelial pellet size of 3~5 mm. The morphology at each fermenter was closely correlated with kLa value, and it was found that similarity of morphology would be used as a criteria of scale-up for liquid culture of G. lucidum.

Scale-up of Optimized Chemical Processes for Micron and Submicron Products (마이크론 이하 단위의 제품생산 최적화를 위한 화학공정의 스케일업)

  • Chung, Young Mi
    • Applied Chemistry for Engineering
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    • v.28 no.1
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    • pp.17-22
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    • 2017
  • This review deals with scale-up strategies for optimized chemical processes particularly for micron and submicron products. The method of finding scale-up factors was also introduced for two systems, a system with chemical reaction and a system without chemical reaction. This review is expected to serve as an initial guideline for process engineers who are to scale up their current chemical processes for small products of micron or submicron size.

Comparative Evaluation of Large-scale Circulating Fluidized Bed (CFB) Boiler Concepts (대용량 순환유동상 보일러 개념 비교평가 기준 정립)

  • Kim, Tae-Hyun;Choi, Sang-Min;Lee, Jong-Min
    • Journal of the Korean Society of Combustion
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    • v.14 no.3
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    • pp.1-15
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    • 2009
  • The circulating fluidized bed (CFB) boiler has some problems to scale up. Several engineering solutions have been proposed by a few suppliers which had advanced CFB technology. Large-scale CFB design concepts from different suppliers were reviewed and compared. Points of the hydrodynamic and heat recovery were summarized and discussed for developing the guideline of the large-scale circulating fluidized bed boilers.

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Optimal Criterion for the Scale-Up Production of Schizophyllan in the Stirred Tank Reactor

  • KWAK, JUNG-KI;KOO, JAE-GUEN;PARK, SUNG-WOO;CHO, MAN-GI;KANG, BYEONG-CHUL;RAINER BUCHHOLZ;PETER GOETZ
    • Journal of Microbiology and Biotechnology
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    • v.15 no.1
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    • pp.1-6
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    • 2005
  • Optimal criterion for the scale-up production of schizophyllan, a fungal polysaccharide secreted by Schizophyllum commune, was investigated. For the production of the polysaccharide in a 150-l bioreactor, the culture conditions optimized in a 15-l bioreactor were applied to a 150-l bioreactor with scale-up process, by changing impeller speed and airflow rate. The optimized impeller speed in the 15-l bioreactor was 50 rpm in a technical medium based on barley. For establishment of the scale-up process, 3 kinds of criteria were used while the gas throughput number was kept constant, as follows; constant volume-related power input, constant tip speed of stirrer, and constant Reynolds number. In the 150-l bioreactor, the highest values for the maximum specific growth rate (1.17/day) and productivity (0.63 g/L${\cdot}$day) were achieved in the culture condition from constant volumerelated power input criterion.

Scale-Up of Polymerization Process of Biodegradable Polymer Poly(lactic acid) Synthesis Using Direct Polycondensation Method

  • Pivsa-Art, Sommai;Niamlang, Sumonman;Pivsa-Art, Weraporn;Santipatee, Nutchapon;Wongborh, Tossamon;Pavasupree, Sorapong;Ishimoto, Kiyoaki;Ohara, Hitomi
    • International Journal of Advanced Culture Technology
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    • v.3 no.2
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    • pp.100-109
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    • 2015
  • Environmental problems from petroleum-based plastic wastes have been rapidly increasing in recent years. The alternative solution is focus on the development of environmental friendly plastic derived from renewable resource. Poly(lactic acid) (PLA) is a biodegradable polymer synthesized from biomass having potential to replace the petroleum-based non-degradable polymers utilizations. PLA can be synthesized by two methods: (1) ring-opening of lactide intermediate and (2) direct polycondensation of lactic acid processes. The latter process has advantages on high yields and high purity of polymer products, materials handling and ease of process treatments. The polymerization process of PLA synthesis has been widely studied in a laboratory scale. However, the mass scale production using direct polycondensation of lactic acid has not been reported. We have investigated the kinetics and scale-up process of direct polycondensation method to produce PLA in a pilot scale. The order of reaction is 2 and activation energy of lactic acid to lactic acid oligomers is 61.58 kJ/mol. The pre-polymer was further polymerized in a solid state polymerization (SSP) process. The synthesized PLA from both the laboratory and pilot scales show the comparable properties such as melting temperature and molecular weight. The appearance of synthesized PLA is yellow-white solid powder.

Fabrication of Micro Mirror Array for Small Form Factor Optical Pick-up by Micro UV-Molding (마이크로 UV성형을 통한 초소형 광픽업용 마이크로 미러 어레이 제작)

  • Choi Yong;Lim Jiseok;Kim Seokmin;Sohn Jin-Seung;Kim Hae-Sung;Kang Shinill
    • Transactions of Materials Processing
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    • v.14 no.5 s.77
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    • pp.477-481
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    • 2005
  • Wafer scale micro mirror array with high surface quality for small form factor (SFF) optical pick-up was fabricated by micro UV-molding. To replicate micro mirror array for SFF optical pick-up, a high- precision mold was fabricated using micro-machining technology. Wafer scale micro mirror array was UV-molded using the mold and then the process was optimized experimentally. The surface flatness and roughness of UV-molded micro mirror array were measured by white light scanning interferomety system and analyzed the transcribing characteristics. Finally, the measured flatness of UV-molded micro mirror away for SFF optical pick-up, which was fabricated in the optimum processing condition, was less than 70nm.

Optimization and Scale-Up of Succinic Acid Production by Mannheimia succiniciproducens LPK7

  • Oh, In-Jae;Kim, Dong-Hyun;Oh, Eun-Kyoung;Lee, Sang-Yup;Lee, Jin-Won
    • Journal of Microbiology and Biotechnology
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    • v.19 no.2
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    • pp.167-171
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    • 2009
  • The effects of culture conditions on succinic acid production and its possible scale-up have been studied. Mannheimia succiniciproducens LPK7, engineered for enhanced production of succinic acid and reduced by-product secretion, was used for the experiments. Mannheimia succiniciproducens LPK7 is a knock-out strain of wild type deficient in the ldhA, pflB, and pta-ackA genes, and is derived from Mannheimia succiniciproducens MBEL55E. Process optimization of factors including optimal temperature, pH, carbon source, and nitrogen source was performed to enhance the production of succinic acid in flasks. To observe scale-up effects, batch fermentation was carried out at various working volumes. At a working volume of 7.0 l, the final succinic acid concentration and yield were 15.4g/l and 0.86g/g. This result shows similar amount of succinic acid obtained in lab-scale fermentation, and it is possible to scale up to larger fermentors without major problems.

A Study on the Effect of Startup's Innovation Orientation on Growth Aspiration (창업기업의 혁신지향성이 성장열망에 미치는 영향에 관한 연구)

  • Oh, Hyemi;Lee, Chaewon;Kim, Jinsoo
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.16 no.5
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    • pp.1-14
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    • 2021
  • Innovation and Scale-up of Start-up companies are becoming important national tasks. In the past, it was spread the start-up policy paradigm such as 'Start-up America', 'Start-up Chile', 'Start-up Britain' to overcome the recession globally. However as the economic recovery has become more visible recently in advanced economies, it is shifting from a start-up support policy to a scale-up oriented policy paradigm such as 'Scale-up America', Scale-up UK', 'Scale-up Denmark'. It is necessary to enter the scale-up phase beyond the start-up phase to increase the number of high-quality jobs and to continue economic growth. Therefore, it is necessary to grow the start-up into a strong medium-sized company and to lay the foundation for survival. Therefore, the purpose of this study is to consider the antecedent factors that influence the scale-up aspiration for the start-up firm to grow into a scale-up company, and empirically identifies the differences between the stages of economic development and entrepreneurs in the country. In order to accomplish the purpose, this study predicted scale-up by aspiration which is a predictor of scale-up behavior because it is difficult to achieve visible growth in a short period of time due to the characteristics of start-up companies. In order to empirically explore these relationships, the data were collected from nascent entrepreneurs who have less than 3.5 years of the Adult Population Survey(APS) among the subjects surveyed by the Global Entrepreneurship Monitor(GEM) and the national economic development stage are divided into Innovation-driven, Efficiency-driven, Factor-driven type economies. For the test hypotheses, this study adopted the multi-level model analysis for comparison between national economic development stages and using the R 3.5.0 program. The results of this study are as follows. There is difference between the national economic development and the entrepreneur in the relationship between innovation orientation of entrepreneurs and scale-up aspirations. As the economy of the country develops, the innovation activity of the entrepreneur becomes more active. Since start-ups are heavily influenced by entrepreneurs, there is a difference in the degree of aspiration depending on how innovative an entrepreneur is in the same environment. In terms of the relationship between innovation orientation and scale-up aspiration, the fear of failure was found to differ between national economic development and entrepreneurs. The fear of failure differ from country to country, and this is one of the important factors affecting entrepreneurial activities. It is expected that the factors influencing the growth of the start-up companies which are identified through the results of these studies, will be used to create a suitable scale-up ecosystem according to the national economic development stage.

5kg $U_{3}O_{8}$ Batch Scale Mock-up Test for the Electrochemical Reduction of Spent Oxide Fuel (사용후핵연료의 전기화학적 금속전환을 위한 5kg $U_{3}O_{8}$ Batch 규모의 Mock-up 시험)

  • 오승철;허진목;홍순석;이원경;서중석;박승원
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.1 no.1
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    • pp.47-53
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    • 2003
  • An electrochemical reduction technology which can reduce the decay heat, volume, and radioactivity of spent fuel by a factor of quarter through converting oxide type spent fuel to a metallic form in a molten salt was developed and tests in a scale of g (3- 40g $U_{3}O_{8}$ batch) have been carried out by Korea Atomic Energy Research Institute. In this research, the reaction apparatus in a scale of 5kg $U_{3}O_{8}$ batch was designed and manufactured for the mock-up test to obtain design data of the apparatus which will be used for the hot test in a scale of 20kg $U_{3}O_{8}$ batch. The electrochemical reduction behavior of $U_{3}O_{8}$ was analyzed regarding the operational factors and fresh $U_{3}O_{8}$ powder was metallized with a more than 99% yield verifying the process validity of electrochemical reduction process in a kg scale.

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