Volume 20 Issue 4
Aug.  2007
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XIAO-MING LI, QI YANG, KAI HUANG, GUANG-MING ZENG, DE-XIANG LIAO, JIN-JING LIU, WEN-FANG LONG. Screening and Characterization of a Bioflocculant Produced by Aeromonas sp.[J]. Biomedical and Environmental Sciences, 2007, 20(4): 274-278.
Citation: XIAO-MING LI, QI YANG, KAI HUANG, GUANG-MING ZENG, DE-XIANG LIAO, JIN-JING LIU, WEN-FANG LONG. Screening and Characterization of a Bioflocculant Produced by Aeromonas sp.[J]. Biomedical and Environmental Sciences, 2007, 20(4): 274-278.

Screening and Characterization of a Bioflocculant Produced by Aeromonas sp.

  • Objective To isolate the bioflocculant-producing bacteria from activated sludge and investigate the flocculating characteristics of the newly isolated bioflocculant. Methods Bacteria were screened from activated sludge samples to isolate bioflocculant-producing bacteria. Flocculating activity was used as a measure of the flocculating capability of the bioflocculant.Results A novel bioflocculant-producing bacterium was isolated, which was identified to belong to genus Aeromonas and named as Aeromonas sp. N11. Flocculating activity increased in the presence of K+, Na+, or Ca2+. The highest flocculating activities for kaolin suspension were obtained in acidic pH ranges, and optimum pHs for it were 3.0, 4.0, and 5.0 with 1 mmol/L K+, Ca+, and Na+ present, respectively. The highest flocculating activities for soil suspension were observed at pH 8.0. The bioflocculant had a good flocculating activity and could achieve a flocculating activity of 92.4% for kaolin suspension at a Conclusion The bioflocculant produced by Aeromonas sp. N11 has strong flocculating activity and high stability, which affords high possibility of its practical use.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Screening and Characterization of a Bioflocculant Produced by Aeromonas sp.

Abstract: Objective To isolate the bioflocculant-producing bacteria from activated sludge and investigate the flocculating characteristics of the newly isolated bioflocculant. Methods Bacteria were screened from activated sludge samples to isolate bioflocculant-producing bacteria. Flocculating activity was used as a measure of the flocculating capability of the bioflocculant.Results A novel bioflocculant-producing bacterium was isolated, which was identified to belong to genus Aeromonas and named as Aeromonas sp. N11. Flocculating activity increased in the presence of K+, Na+, or Ca2+. The highest flocculating activities for kaolin suspension were obtained in acidic pH ranges, and optimum pHs for it were 3.0, 4.0, and 5.0 with 1 mmol/L K+, Ca+, and Na+ present, respectively. The highest flocculating activities for soil suspension were observed at pH 8.0. The bioflocculant had a good flocculating activity and could achieve a flocculating activity of 92.4% for kaolin suspension at a Conclusion The bioflocculant produced by Aeromonas sp. N11 has strong flocculating activity and high stability, which affords high possibility of its practical use.

XIAO-MING LI, QI YANG, KAI HUANG, GUANG-MING ZENG, DE-XIANG LIAO, JIN-JING LIU, WEN-FANG LONG. Screening and Characterization of a Bioflocculant Produced by Aeromonas sp.[J]. Biomedical and Environmental Sciences, 2007, 20(4): 274-278.
Citation: XIAO-MING LI, QI YANG, KAI HUANG, GUANG-MING ZENG, DE-XIANG LIAO, JIN-JING LIU, WEN-FANG LONG. Screening and Characterization of a Bioflocculant Produced by Aeromonas sp.[J]. Biomedical and Environmental Sciences, 2007, 20(4): 274-278.

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