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2010•Huadong Shifan Daxue xuebao. Ziran kexue banRequires access

Study on scale inhibition properties of γ-PGA

Zhao Sun, Xiaojun Ma, Huang Jing, Wen Liu, Zirong Wu

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Abstract

Poly-γ-glutamic acid(γ-PGA) produced by fermentation of Bacillus sp was studied as a potential novel green scale inhibitor.The effects ofγ-PGA concentration,molecular weight ofγ-PGA,temperature,pH and Ca~(2+) concentration on the scale inhibiting rate ofγ-PGA were respectively analyzed using static anti-scaling method,and the structural characterization of scale inhibiting products and possible mechanism were investigated.The results reveal that both large molecularγ-PGA and small molecularγ-PGA have inhibiting efficiency.More specifically,small molecularγ-PGA shows the better inhibiting efficiency with their lowest concentration to get 100%inhibiting efficiency from scale of CaSO_4 and CaCO_3 being 4 mg/L and 2 mg/L respectively, while large molecularγ-PGA to get the same efficiency in the same condition is 20 mg/L respectively.

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What this paper is about

Poly-γ-glutamic acid(γ-PGA) produced by fermentation of Bacillus sp was studied as a potential novel green scale inhibitor.The effects ofγ-PGA concentration,molecular weight ofγ-PGA,temperature,pH and Ca~(2+) concentration on the scale inhibiting rate ofγ-PGA were respectively analyzed using static anti-scaling method,and the structural characterization of scale inhibiting products and possible mechanism were investigated.The results reveal that both large molecularγ-PGA and small molecularγ-PGA have inhibiting efficiency.More specifically,small molecularγ-PGA shows the better inhibiting efficiency with their lowest concentration to get 100%inhibiting efficiency from scale of CaSO_4 and CaCO_3 being 4 mg/L and 2 mg/L respectively, while large molecularγ-PGA to get the same efficiency in the same condition is 20 mg/L respectively.

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Available abstract

Poly-γ-glutamic acid(γ-PGA) produced by fermentation of Bacillus sp was studied as a potential novel green scale inhibitor.The effects ofγ-PGA concentration,molecular weight ofγ-PGA,temperature,pH and Ca~(2+) concentration on the scale inhibiting rate ofγ-PGA were respectively analyzed using static anti-scaling method,and the structural characterization of scale inhibiting products and possible mechanism were investigated.The results reveal that both large molecularγ-PGA and small molecularγ-PGA have inhibiting efficiency.More specifically,small molecularγ-PGA shows the better inhibiting efficiency with their lowest concentration to get 100%inhibiting efficiency from scale of CaSO_4 and CaCO_3 being 4 mg/L and 2 mg/L respectively, while large molecularγ-PGA to get the same efficiency in the same condition is 20 mg/L respectively.

Key concepts: Fermentation, Chemistry, Scaling, Glutamic acid, Nuclear chemistry, Biophysics, Chemical engineering, Biochemistry

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