J4 ›› 2010, Vol. 9 ›› Issue (4): 73-75.

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Screening of a Bioflocculant-Producing Strain and Optimization of Its Culture Conditions

  

  1. 1. College of Life Science and Chemistry, Dali University, Dali, Yunnan 671000, China;
    2. No. 5 Middle School of Luliang , Qujing, Yunnan 655600, China
  • Received:2010-02-20 Online:2010-04-15 Published:2010-04-15

Abstract:

A flocculant-producing bacterium from Cangshan soil named CS-26 was isolated. Through tests, the optimum culture
conditions were found to be: starch 20 g,KH2PO4 2 g,polypeptone 1 g,MgSO4·7H2O 0.5 g,CaCl2 0.5 g,pH 7.0,H2O 1L,30 0C, 180 r/min, 72 h. The strain CS-26 could produce a strong-activiting flocculant with flocculating rate of 98.85 % against kaolin clay suspension.

Key words: bioflocculant, screening, flocculating activity, culture conditions

CLC Number: