Production of rhamnolipids by semi-solid-state fermentation with Pseudomonas aeruginosa RG18 for heavy metal desorption
Autor: | Zhiyong Zheng, Xiaobei Zhan, Jianrong Wu, Li Zhu, Jingbo Zhang, Panpan Wang, Minjie Gao |
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Rok vydání: | 2017 |
Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_element Bioengineering 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Metals Heavy 010608 biotechnology Desorption Glycerol Soil Pollutants Surface Tension Food science Environmental Restoration and Remediation Cadmium Aqueous solution Chromatography Bran food and beverages General Medicine Lipids Soil contamination 030104 developmental biology Lead chemistry Spectrometry Mass Matrix-Assisted Laser Desorption-Ionization Fermentation Pseudomonas aeruginosa Emulsions Industrial and production engineering Biotechnology |
Zdroj: | Bioprocess and Biosystems Engineering. 40:1611-1619 |
ISSN: | 1615-7605 1615-7591 |
Popis: | Foaming problem and cost of substrate limit the commercial application of rhamnolipids, a potential biosurfactant produced by Pseudomonas aeruginosa. We explored the production of rhamnolipids by a semi-solid-state (SSS) fermentation strategy with glycerol as carbon source and rapeseed/wheat bran as matrix, along with the capacity of the produced rhamnolipids to solubilize lead and cadmium in aqueous solution. Structural analysis by MALDI-TOF MS indicated the increased proportion of mono-rhamnolipids from SSS fermentation. E24 results showed the stronger emulsification capacity and reduced water tension of the SSS fermentation product. Rhamnolipids from SSS fermentation can desorb lead/cadmium from contaminated soil effectively and heavy metals in exchangeable and carbonate forms were easily removed. Our findings suggest that SSS fermentation is an alternative for the economical production of rhamnolipids and the product can be used to solubilize heavy metals from soils. |
Databáze: | OpenAIRE |
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