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2010•Environmental ChemistryRequires access

OPTIMIZATION OF FLOCCULATING CONDITIONS OF MICROBIAL FLOCCULANT USING RESPONSE SURFACE METHODOLOGY

YU Han-qing

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Abstract

A bacterium TF10 was found to produce microbial flocculant P-TF10,and was identified as Bacillus megatherium.The effect of pH,flocculating dosage and various cations on flocculating activity was investigated against kaolin suspensions.The results showed that optimum pH and flocculating dosage exist for the flocculating efficiency.Mg2+ and Na+ had no effect on flocculation,while Ca2+ and Al3+ enhanced the flocculating activity.The response surface methodology was employed to optimize the flocculation process.The best flocculating efficiency(95.5±1.0)% was obtained with pH 4.7,CaCl2 dosage of 7.0mmol·l-1and P-TF10 dosage of 34.6 mg·l-1.

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What this paper is about

A bacterium TF10 was found to produce microbial flocculant P-TF10,and was identified as Bacillus megatherium.The effect of pH,flocculating dosage and various cations on flocculating activity was investigated against kaolin suspensions.The results showed that optimum pH and flocculating dosage exist for the flocculating efficiency.Mg2+ and Na+ had no effect on flocculation,while Ca2+ and Al3+ enhanced the flocculating activity.The response surface methodology was employed to optimize the flocculation process.The best flocculating efficiency(95.5±1.0)% was obtained with pH 4.7,CaCl2 dosage of 7.0mmol·l-1and P-TF10 dosage of 34.6 mg·l-1.

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Available abstract

A bacterium TF10 was found to produce microbial flocculant P-TF10,and was identified as Bacillus megatherium.The effect of pH,flocculating dosage and various cations on flocculating activity was investigated against kaolin suspensions.The results showed that optimum pH and flocculating dosage exist for the flocculating efficiency.Mg2+ and Na+ had no effect on flocculation,while Ca2+ and Al3+ enhanced the flocculating activity.The response surface methodology was employed to optimize the flocculation process.The best flocculating efficiency(95.5±1.0)% was obtained with pH 4.7,CaCl2 dosage of 7.0mmol·l-1and P-TF10 dosage of 34.6 mg·l-1.

Key concepts: Flocculation, Chemistry, Response surface methodology, Chromatography, Pulp and paper industry, Nuclear chemistry, Organic chemistry, Engineering

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OPTIMIZATION OF FLOCCULATING CONDITIONS OF MICROBIAL FLOCCULANT USING RESPONSE SURFACE METHODOLOGY — Research Paper | ScholarLens