• 제목/요약/키워드: Bioreactor

검색결과 950건 처리시간 0.031초

Biodegradation of Toluene using Biofilms in a Bubble Column Bioreactor

  • Choi, Yong-Bok;Lee, Jang-Young;Kim, Hak-Sung
    • Journal of Microbiology and Biotechnology
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    • 제5권1호
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    • pp.41-47
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    • 1995
  • Biodegradation of toluene in liquid effluent stream was carried out using biofilms of Pseudomonas putida formed on celite particles in the bubble column bioreactor. Silicon rubber tubing was installed at the bottom of the bioreactor and liquid toluene was circulated within the tubing. Toluene diffused out of the tube wall and was transferred into the culture broth where degradation by biofilms occurred. The operating variables affecting the formation of biofihns on celite particles were investigated in the bubble column bioreactor, and it was found that formation of bifilm is favored by high dilution rate and supply rate of carbon source which stimulate the growth of initially attached cells. Continuous biodegradation of toluene using biofilms was stablely conducted in the bioreactor for more than one month without any significant fluctuation, showing a removal efficiency higher than 95% at the toluene transfer rate of 1.2 g/L/h.

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Efficient Propagation by Bioreactor System of Korean Native Seosanjong in Ginger

  • Jo, Man-Hyun;Ham, In-Ki;Lee, Mi-Ae;Lee, Eun-Mo;Song, Nam-Hyun;Woo, In-Shik
    • Plant Resources
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    • 제3권3호
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    • pp.219-222
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    • 2000
  • For the purpose of establishing an efficient propagation through airlift bioreactor system of Zingiber of officinale Rosc. Korean native Seosanjong, the effect of different factors and bioreactor on cultured plantlets were investigated. The highest number of plantlets, fresh weight per plant was obtained from explants when cultured in MS liquid medium including 0.3 mg/L NAA and 2.0 mg/L kinetin for 40 days. A 10 L bottle type bubble bioreactor, compared with 250 mL Erlenmeyer flask, was more efficient, producing 4.7 plantlets or from 1.5 to 1.6 times more than did the Erlenmeyer flask. The results demonstrate the rapid mass propagation of airlift bioreactor to produce normal ginger.

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활성슬러지 반응탱크의 풍량제어지표인 NADH에 관한 연구 (Study on NADH which is the Air Volume Sensor in the Activated Sludge Reaction Tank)

  • 정우진;홍성민;김한래;장순웅
    • 한국환경과학회지
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    • 제25권3호
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    • pp.439-446
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    • 2016
  • Domestic sewerage treatment plant is operated by activated sludge method and its modified method by using microorganism. In most cases, a method of using microorganism is directly controlled by the operator based on individual judgment through factors of DO, pH and ORP. In addition, under aerobic condition in bioreactor, energy consumption including excessive air injection is learned to be somewhat plenty. In order to solve this problem, in most of the process, improvement of internal recycling and activated environmental factor of microorganism were researched extensively. However, as factors are changed depending on various conditions, it is not sufficient as an indicator of judgment. As such, a research on operation of bioreactor that measures metabolic change in short time by directly measuring activated condition of microorganism using NADH fluorometer is required in reality.It is considered that the method like this could supplement problem of energy consumption being occurred in the existing treatment method and operational optimization of bioreactor would be enabled by controlling optimal air volume. Therefore, in this study, in order to obtain optimal operational indicator of bioreactor, proper air volume control test was performed and through batch test and site evaluation, possibility of NADH sensor being utilized as operational control indicator of bioreactor is intended to be analyzed. In order to compare with measured value, DO, ORP that are operational control indicator of existing bioreactor were used. As MLSS concentration was increased through batch test, NADH value was increased and site evaluation also showed similar tendency to batch test. Resultantly, it could be confirmed that changing level of NADH fluorometer was a sensor that could measure bioreactor condition effectively and optimized scale of bioreactor is considered to be utilized.

음이온하전막을 이용한 NAD 재생형 bioreactor에 의한 fructose로부터 sorbitol의 생산 (Production of Sorbitol from Fructose in Charged Membrane Bioreactor With NAD-Regeneration System)

  • 박선영;윤세억
    • KSBB Journal
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    • 제7권3호
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    • pp.179-185
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    • 1992
  • NAD재생형 bioreactor를 구축함에 있어 음이온 하전막을 이용하고자 하였다. 사용한 막은 용액상의 NAD의 통과를 저지하여 80.9%를 bioreactor내에 존속시켰는데 NAD의 bioreactor내에의 존속율은 Tris-maleate완충용액을 사용하고 albumin을 첨가하므로써 증가되었다. 음이온하전막을 장착한 bioreactor내에서 주반응 효소로서 sorbitol dehydrogenase와 재생반응효소로서 alcohol dehydrogenase를 사용하여 NADH로의 재생과 함께 fructose로부터 sorbitol의 생산을 행하였다. 반응형식은 반복회분조작을 행하였는데 매 회분마다 70%의 전환율이 될 때까지 반응기킨 후 반응액의 90%를 회수한 후 fructose와 ethanol을 feed하여 다음의 회분반응을 행하였다. Sobitol의 생산량은 198시간의 반응에서 47g/L이었다. 한편 사용한 막의 NAD존속율은 반응종료후에도 거의 감소되지 않았다.

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Cultivation of Transgenic Nicotiana tabacum Suspension Cells in Bioreacters for the Production of mGM-CSF

  • Lee, Sang-Yoon;Won Hur;Cho, Gyu-Heon;Kim, Dong-Il
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제6권1호
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    • pp.72-74
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    • 2001
  • Transgenic Nicotiana tabacum cells were cultivated for the production of murine granulocyte macrophage-colony stimulating factor (mGM-CSF) in both a stirred tank bioreactor and an airlift bioreactor with draft tube. Cell growth and mGM-CSF production in the airlift bioreactor were found to be better than those achieved in the stirred tank bioreactor. In the airlift bioreactor, 9.0g/L of cells and 2.2ng/mL of mGM-CSF were obtained (11.0g/L and 2.4ng/mL, respectively in shake flasks). Although the lag period was prolonged and mGM-CSF production was lowered by 33% in the stirred thank bioreactor as compared to the control culture, the maximum cell density was increased up to 12.0g/L due to better mixing by agitation at the higher cell density.

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새송이버섯 biomass를 위한 최적배양 조건 (Culture Condition for Biomass of Pleurotus eryngii)

  • 김명욱;권오준;우희섭;조영제
    • Applied Biological Chemistry
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    • 제50권1호
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    • pp.1-5
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    • 2007
  • 새송이버섯의 biomass를 위한 최적조건을 규명한 결과, 균사체 spot 배양을 위한 최적 조건은 PDA배지를 사용하여 24$^{\circ}C$에서 18일 배양 시 최적인 것으로 판단하였으며, 새송이버섯 균사체 Biomass를 위한 bioreactor의 배양 최적조건은 PDMP배지를 사용하여 pH 5.5, 18$^{\circ}C$에서 27일 배양시 reactor의 반응은 최적의 상태를 나타낼 수 있을 것이라 판단되었다. 최적조건에서 bioreactor를 이용한 새송이버섯 균사체의 인공적인 대량 배양이 가능하였으며, bioreactor에서 대량 인공 배양된 균사체를 이용한 새송이버섯 재배 시, 자실체가 형성되어 새송이버섯의 대량생산을 위한 biomass가 가능하였다.

다양한 생물반응기 형태가 인삼(Panax ginseng C.A. Meyer) 부정근의 생장과 Ginsenoside 생산에 미치는 영향 (Effects of Various Bioreactors on Growth and Ginsenoside Accumulation in Ginseng Adventitious Root Cultures(Panax ginseng C.A. Meyer))

  • 김윤수;한은주;백기엽
    • Journal of Plant Biotechnology
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    • 제31권3호
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    • pp.249-253
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    • 2004
  • 생물반응기의 형태에 따른 인삼부정근의 생장과 ginsen-side의 생산능력에 대하여 조사한 결과, 원형의 상부와 하부에 5 cm의 bubble column을 가진 bulb type bubble bioreactor (BU)에서 건물중은 41.92 g으로 가장 많이 증가하였으며, cylindric tube bioreactor (CT)에서 건물중이 38.55g으로 가장 낮게 나타났다. 이들 두 생물반응기의 초기 kLa 값은 BU 생물반응기에서 6.98 h$^{-1}$로 가장 높게 측정되었고, 반대로 bubble column이 없는 CT 생물반응기에서 5.25 h$^{-1}$으로 가장 낮게 측정되었다. 그러나 이와 같은 초기 kLa값의 차이는 부정근내의 이차대사산물인 ginsenoside의 함량에는 영향을 주지 않는 것으로 나타났다. 또한 BU 생물반응기에서 bubble column의 길이를 기존의 5 cm에서 10 cm로 연장시켰을 때, 초기 kLa값이 6.52 h$^{-1}$에서 7.80 h$^{-1}$로 증가하면서 인삼부정근의 생장을 42.13 g에서 50.30 g으로 약 16% 증가시킨 것으로 나타났다.

Cloning and Characterization of Filamentous Fungal S-Nitrosoglutathione Reductase from Aspergillus nidulans

  • Zhou, Yao;Zhou, Shengmin;Yu, Haijun;Li, Jingyi;Xia, Yang;Li, Baoyi;Wang, Xiaoli;Wang, Ping
    • Journal of Microbiology and Biotechnology
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    • 제26권5호
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    • pp.928-937
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    • 2016
  • S-Nitrosoglutathione reductase (GSNOR) metabolizes S-nitrosoglutathione (GSNO) and has been shown to play important roles in regulating cellular signaling and formulating host defense by modulating intracellular nitric oxide levels. The enzyme has been found in bacterial, yeast, mushroom, plant, and mammalian cells. However, to date, there is still no evidence of its occurrence in filamentous fungi. In this study, we cloned and investigated a GSNOR-like enzyme from the filamentous fungus Aspergillus nidulans. The enzyme occurred in native form as a homodimer and exhibited low thermal stability. GSNO was an ideal substrate for the enzyme. The apparent Km and kcat values were 0.55 mM and 34,100 min-1, respectively. Substrate binding sites and catalytic center amino acid residues based on those from known GSNORs were conserved in this enzyme, and the corresponding roles were verified using site-directed mutagenesis. Therefore, we demonstrated the presence of GSNOR in a filamentous fungus for the first time.

독립영양형 메탄생산세균의 농화 및 메탄생산 반응기의 개발 (Development of Bioreactors for Enrichment of Chemolithotrophic Methanogen and Methane Production)

  • 나병관;황태식;이성훈;주동훈;상병인;박두현
    • 한국미생물·생명공학회지
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    • 제35권1호
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    • pp.52-57
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    • 2007
  • 수소-이산화탄소(5:1) 혼합가스 순환장치를 장착한 반응기를 이용하여 독립영양형 메탄생산세균을 농화하였으며, 생산된 메탄의 농도는 10%미만이었다. 30일 이상 농화배양한 후 16S-rDNA 동질성을 이용하여 반응기에서 생장하고 있는 세균을 분석한 결과 수소를 단일 에너지 원으로 이용하는 Methanobacterium curvum와 Methanobacterium oryzae로 확인되었다. 농화된 세균을 hollow-fiber수소 공급장치를 장착한 반응기에 배양하여 메탄의 농도를 30%까지 향상하였다. 그러나 농화된 세균을 hollow-fiber 수소 공급장치와 미량의 수소를 생산하고 전기화학적 환원성 환경을 유도할 수 있는 장치를 장착한 복합형 반응기에 적용한 결과 메탄의 생산성은 50%가지 향상하였다. 이러한 결과는 독립영양형 메탄생산세균을 농화 또는 대량 배양하기 위해서 hollow-fiber 수소 공급장치와 전기화학적 환원력을 복합적으로 이용하는 것이 유리하다는 것을 보여주는 것이다.

Biomass의 고효율 효소당화에 적합한 Attrition Coupled Bioreactor 개발에 관한 연구 ; Tumbling Drum Type Bioreactor를 활용한 섬유소 당화 (Development and Evaluation of the Attrition Coupled Bioreactors for Enzymatic Hydrolysis of Biomass ; Tumbling-Drum Type Bioreactor for Enzymatic Hydrolysis of Cellulose)

  • 이용현;조구형;박진서
    • KSBB Journal
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    • 제4권2호
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    • pp.87-93
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    • 1989
  • 불용성 기질인 섬유소의 고효율 효소당화에 적합한 분쇄마찰매체함유 반응장치의 개발을 목표로 섬유소-효소-분쇄마찰매체함유 반응장치의 개발을 목표로 섬유소-효소-분쇄마찰매체의 혼합액을 통자체를 회전시켜 교반마찰시키는 tumnling drum type bioreactor를 제작하여 그 효용성을 검토하였다. 반응조 내부의 구조 및 제반 운전조건하에서의 당생성 효울을 분쇄마찰매체의 교반에 소요되는 에너지와 비교분석 검토함으로써 공업적 규모의 활용을 위한 기술적, 경제적 타당성을 평가하였다. 3L규모의 장치의 경우 반응조내경과 baffle의 크기의 비가 1:0.05이고 8개의 baffle을 설치한 반응조에서 3mm glass bead를 600g/l로 첨가하여 100rpm으로 교반할 때 가장 우수한 결과를 얻었다. Tumbling drum type bioreactor는 매우 효율적인 attrition coupled된 당화장치로 판단되며, 특히 산업적 규모로 scale-up하기 용이한 구조를 갖고 있어 이에 대한 구체적 연구가 요망된다.

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