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A novel flocculant biopolymer produced by Pestalotiopsis sp. KCTC 8637P

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Summary

A white rot fungus was isolated from rotted leaves and identified as Pestalotiopsis sp. KCTC 8637P. It produced a flocculant biopolymer. A flocculant was partially purified from the culture broth by series of precipitations with 95% ethanol and named as Pestan. The components of Pestan were consisted of glucose : glucosamine : glucuronic acid : rhamnose with a approximately molar ratio of 100:3.5:1.6:1.3.

In kaolin suspension(final concentration was 4,800 mg/l), the highest flocculating activity was attained at the biopolymer flocculant concentration of 1 mg/l . The flocculating activity was observed most highest by the addition of cationic solutions, especially 8mM CaCl2 · 2H2O or 8mM FeCl3. The thermal stability of Pestan was sustained up to 70 °C.

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Authors and Affiliations

  1. Environmental Microbiology Research Unit, Korea Research Institute of Bioscience and Biotechnology, KIST, P. O. BOX 115, 305-600, Taejon, Korea

    Kwon G. S., Moon S. H., Kim H. S., Oh H. M. & Yoon B. D.

  2. Department of Microbiology, College of Natural Science, Kyungpook National University, 702-701, Taegu, Korea

    Hong S. D.

  3. Department of Biology, College of Natural Science, Andong National University, 760-749, Andong, Korea

    Lee H. M.

Authors
  1. Kwon G. S.
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  2. Moon S. H.
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  3. Hong S. D.
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  4. Lee H. M.
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  5. Kim H. S.
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  6. Oh H. M.
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  7. Yoon B. D.
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Kwon, G.S., Moon, S.H., Hong, S.D. et al. A novel flocculant biopolymer produced by Pestalotiopsis sp. KCTC 8637P. Biotechnol Lett 18, 1459–1464 (1996). https://doi.org/10.1007/BF00129355

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  • DOI: https://doi.org/10.1007/BF00129355

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