Ultrafiltration associated with microporous resin decolorizing the Bacillus subtilis fermentation broth for the production of γ-polyglutamic acid

Author:

Yu Qianhui1,Zhang Jinfeng1,Cui Yanmin1,Zhang Xiushan1,Yang Shuning1,Huang Xin1,Li Tuoping1ORCID

Affiliation:

1. College of Food Science , Shenyang Agricultural University , 120 Dongling Road, Shenhe District , Shenyang 110866 , China

Abstract

Abstract Currently, the industrial production of γ-polyglutamic acid (γ-PGA) was mainly based on microbial fermentation, but the decolorization technology still needs to be improved. Therefore, in this study, the optimal decolorization conditions and efficiencies were investigated. As the result, D4006 was an ideal resin for the decolorization of γ-PGA fermentation broth. The optimal decolorization pH value and temperature were pH 3 and 40 °C, respectively; ultrafiltration differential pressure, temperature and time were 0.2 MPa, 40 °C, and 6 h, respectively. Moreover, the combination of D4006 (3 %) resin on the basis of ultrafiltration had a better decolorization effect on γ-PGA fermentation broth, and the decolorization rate reached 96.8 %.

Publisher

Walter de Gruyter GmbH

Subject

Engineering (miscellaneous),Food Science,Biotechnology

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