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Bacterial community enhances flocculation efficiency of Ettlia sp. by altering extracellular polymeric substances profile.
Vu, Chau Hai Thai; Chun, Seong-Jun; Seo, Seong-Hyun; Cui, Yingshun; Ahn, Chi-Yong; Oh, Hee-Mock.
Affiliation
  • Vu CHT; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Y
  • Chun SJ; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Y
  • Seo SH; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Life Science, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
  • Cui Y; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
  • Ahn CY; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Y
  • Oh HM; Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; Department of Environmental Biotechnology, KRIBB School of Biotechnology, Korea University of Science & Technology (UST), 217 Gajeong-ro, Y
Bioresour Technol ; 281: 56-65, 2019 Jun.
Article in En | MEDLINE | ID: mdl-30797175
This study examined the effects of a bacterial community and extracellular polymeric substances (EPS) on Ettlia sp. flocculation. The growth rate, flocculation efficiency (FE), bacterial community, and EPS profile of axenic and xenic Ettlia cultures were monitored during 46 days of cultivation. For the xenic culture, with a great abundance of growth-promoting and flocculation-inducing bacteria, the biomass density was 18.75% higher and its FE reached 100% in the mid-stationary phase. Moreover, microscopic observation and a quantitative analysis of the EPS revealed the exclusive presence of long filamentous EPS and more compact structure in the xenic Ettlia culture, possibly explaining its better FE. Notwithstanding, for the axenic culture, despite a lower biomass density and reduced abundance of EPS, its FE reached 92.54% in the mid-stationary phase. Thus, the role of the bacterial community was found to be supportive rather than vital for the high settleability of the self-flocculating Ettlia microalgal culture.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Microalgae / Microbiota / Flocculation / Chlorophyceae / Extracellular Polymeric Substance Matrix Language: En Journal: Bioresour Technol Journal subject: ENGENHARIA BIOMEDICA Year: 2019 Document type: Article Country of publication: United kingdom

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Microalgae / Microbiota / Flocculation / Chlorophyceae / Extracellular Polymeric Substance Matrix Language: En Journal: Bioresour Technol Journal subject: ENGENHARIA BIOMEDICA Year: 2019 Document type: Article Country of publication: United kingdom