期刊
BIOPROCESS AND BIOSYSTEMS ENGINEERING
卷 45, 期 1, 页码 31-44出版社
SPRINGER
DOI: 10.1007/s00449-021-02635-2
关键词
Lipopeptide; Date flour; Valorization; Taguchi design; Surface activity; Chelation
资金
- Ministry of Higher Education and Research of Tunisia
This study demonstrated the valorization of date flour through the production of a lipopeptide biosurfactant (BioS) by Bacillus subtilis ZNI5, showing promising surface activity properties and potential applications in the bioremediation of heavy metals.
The present study summarizes the valorization of date flour by the production of lipopeptide biosurfactant (BioS) by Bacillus subtilis ZNI5 (MW091416). A Taguchi design permitted the formulation of a medium composed only of 6% date flour and 0.5% yeast extract within 2 days of incubation at 150 rpm with a maximal surface tension (ST) reduction of about 27.8 mN/m. The characterization of the lipopeptide shows a CMC value of about 400 mg/L with a minimal ST of 30 mN/m and an ability to disperse oil to about 80 mm at 800 mg/L. Having reduced phytotoxicity, the ZNI5 BioS and ZNI5 strain were assayed for Copper and Cobalt chelation and biosorption. The improvement of the germination index of radish seeds irrigated by the treated contaminated water showed the great potential application of ZNI5 lipopeptide in the bioremediation of heavy metals.
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