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Open AccessArticle

A Multifunctional Biosurfactant Extract Obtained from Corn Steep Water as Bactericide for Agrifood Industry

1
Chemical Engineering Department, School of Industrial Engineering—Centro de Investigación Tecnológico Industrial (MTI), University of Vigo, Campus as Lagoas-Marcosende, 36310 Vigo, Spain
2
Chemical Engineering Department, Universitat Politècnica de Catalunya (UPC)—Barcelona TECH, Campus Diagonal, Besòs, 08930 Barcelona, Spain
3
Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC)—Barcelona TECH; Campus Diagonal, Besòs, 08930 Barcelona, Spain
*
Authors to whom correspondence should be addressed.
Foods 2019, 8(9), 410; https://doi.org/10.3390/foods8090410
Received: 19 July 2019 / Revised: 4 September 2019 / Accepted: 10 September 2019 / Published: 12 September 2019
(This article belongs to the Special Issue Quality and Functionality of Plant Foods)
The increase of crop production along with stricter requirements on food security have augmented the demand of new and eco-friendly bactericides. Most of the bactericides used at the moment consist of persistent organic substances, representing a risk for environmental and human health. For instance, agriculture bactericides used for crop protection includes copper-based, dithiocarbamate and amide bactericides, which are not biodegradable, resulting in the necessity of further research about the production of new active principles that attack microorganisms without producing any harmful effect on human health or environment. The biosurfactant extract evaluated in this work as a bactericide, is obtained from corn steep water, a residual stream of corn wet milling industry, which is fermented spontaneously by probiotic lactic acid bacteria that possess the capacity to produce biosurfactants. In previous works, it has been demonstrated that this biosurfactant extract is able to promote the growth of Lactobacillus casei in drinkable yogurts, though its antimicrobial activity against pathogenic strains has not been evaluated at the moment. The results obtained in this work have proved that this biosurfactant extract is effective as bactericide against Pseudomonas aeruginosa and Escherichia coli, at concentrations of 1 mg/mL, opening the door to its use in agrifood formulations for reducing the use of chemical pesticides and preservatives. View Full-Text
Keywords: corn; water stream; biosurfactant; bactericide; Pseudomonas aeruginosa; Escherichia coli corn; water stream; biosurfactant; bactericide; Pseudomonas aeruginosa; Escherichia coli
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López-Prieto, A.; Vecino, X.; Rodríguez-López, L.; Moldes, A.B.; Cruz, J.M. A Multifunctional Biosurfactant Extract Obtained from Corn Steep Water as Bactericide for Agrifood Industry. Foods 2019, 8, 410.

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