Production of rhamnolipids by semi-solid-state fermentation with Pseudomonas aeruginosa RG18 for heavy metal desorption

被引：20
|
作者：
Wu, Jianrong [1 ]
Zhang, Jingbo [1 ]
Wang, Panpan [1 ]
Zhu, Li [1 ]
Gao, Minjie [1 ]
Zheng, Zhiyong [1 ]
Zhan, Xiaobei [1 ]
机构：
[1] Jiangnan Univ, Sch Biotechnol, Key Lab Ind Biotechnol, Minist Educ, 1800 Lihu Av, Wuxi 214122, Jiangsu, Peoples R China
来源：
BIOPROCESS AND BIOSYSTEMS ENGINEERING | 2017年 / 40卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Rhamnolipids; Semi-solid-state fermentation; Emulsification capacity; Heavy metal desorption; ENHANCED OIL-RECOVERY; BIOSURFACTANT PRODUCTION; ENVIRONMENTAL APPLICATIONS; GLYCEROL; BIOREACTOR; SYSTEMS; STRAIN; CARBON; CELLS;
D O I：
10.1007/s00449-017-1817-8
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
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.
引用
收藏
页码：1611 / 1619
页数：9
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