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Structure, properties and applications of rhamnolipids produced by Pseudomonas aeruginosa L2-1 from cassava wastewater

Paper ID Volume ID Publish Year Pages File Format Full-Text
34971 45064 2010 6 PDF Available
Title
Structure, properties and applications of rhamnolipids produced by Pseudomonas aeruginosa L2-1 from cassava wastewater
Abstract

The properties and applications of rhamnolipid surfactants produced by Pseudomonas aeruginosa L2-1 from cassava wastewater added with waste cooking oil (CWO) as low-cost substrate, were investigated and compared with the commercial rhamnolipid mixture JBR599 (Jeneil Biosurfactant Co., Saukville, USA). The rhamnolipids produced by strain L2-1 were characterized by high performance liquid chromatography–mass spectrometry. Sixteen different rhamnolipid congeners were detected, with Rha-C10-C10 and Rha-Rha-C10-C10 being the most abundant. The L2-1 rhamnolipids from CWO showed similar or better tensioactive properties than those from JBR599, with a minimal surface tension of 30 mN/m and a critical micelle concentration (CMC) of 30 mg/l. The L2-1 biosurfactants formed stable emulsions with several hydrocarbons and showed excellent emulsification of soybean oil (100%). These rhamnolipids removed 69% of crude oil present in contaminated sand samples at the CMC and presented antimicrobial activity against Bacillus cereus (32 μg/ml), Micrococcus luteus (32 μg/ml) and Staphylococcus aureus (128 μg/ml). These results demonstrate that the rhamnolipids produced in CWO can be useful for industrial applications, such as the bioremediation of oil spills.

Keywords
Rhamnolipids; P. aeruginosa; Cassava wastewater; Tensioactive properties; Oil removal
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Structure, properties and applications of rhamnolipids produced by Pseudomonas aeruginosa L2-1 from cassava wastewater
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 45, Issue 9, September 2010, Pages 1511–1516
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us