Journal
BIORESOURCE TECHNOLOGY
Volume 212, Issue -, Pages 144-150Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.04.027
Keywords
Oil mill wastewater; Corn steep liquor; Sugarcane molasses; Rhamnolipid; Pseudomonas aeruginosa
Funding
- Portuguese Foundation for Science and Technology (FCT) [UID/BIO/04469/2013]
- COMPETE [POCI-01-0145-FEDER-006684]
- FCT [UID/BIO/04469/2013, RECI/BBB-EBI/0179/2012 (FCOMP-01-0124-FEDER-027462), CEB-BPD/01/2015/07, SFRH/BD/111600/2015]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/111600/2015] Funding Source: FCT
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In this work, oil mill wastewater (OMW), a residue generated during olive oil extraction, was evaluated as an inducer of rhamnolipid production. Using a medium containing as sole ingredients corn steep liquor (10%, v/v), sugarcane molasses (10%, w/v) and OMW (25%, v/v), Pseudomonas aeruginosa #112 produced 4.5 and 5.1 g of rhamnolipid per liter in flasks and reactor, respectively, with critical micelle concentrations as low as 13 mg/l. Furthermore, in the medium supplemented with OMW, a higher proportion of more hydrophobic rhamnolipid congeners was observed comparing with the same medium without OMW. OMW is a hazardous waste which disposal represents a serious environmental problem; therefore, its valorization as a substrate for the production of added-value compounds such as rhamnolipids is of great interest. This is the first report of rhamnolipid production using a mixture of these three agro-industrial by-products, which can be useful for the sustainable production of rhamnolipids. (C) 2016 Elsevier Ltd. All rights reserved.
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