Abstract
The olive oil production industry is a relevant economic activity in the Mediterranean countries. However, in the extraction process a large amount of a residual effluent called olive mill wastewaters (OMWW) is produced, which represents a large environmental problem. The physicochemical composition of the OMWW is variable but can be characterized by a high organic load, acidic pH, intense oily smell, and a dark brown colour. The high-level organic complexity contributes to their biodegradability resistance, causing negative environmental effects. Up until now, a globally standardised treatment for this residue has not been defined, mainly due to technical and economic limitations. However, this residue has the potential for being used in different areas, being converted from an environmental problem to a possible solution. In this work, the total phenolic content, antioxidant activity and the antimicrobial activity of two different OMWW against eight different microorganisms were evaluated. The results showed that OMWW has a good inhibitory power against different pathogenic bacteria, especially against Klebsiella pneumoniae, Staphylococcus aureus, Proteus mirabilis and Enterococcus faecalis, and therefore can potentially be exploited for their antimicrobial activity.
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Acknowledgements
Financial support was provided by Portugal’s national funding FCT/MCTES (PIDDAC) to Centro de Investigação de Montanha (CIMO) (UIDB/00690/2020 and UIDP/00690/2020) and SusTEC (LA/P/0007/2020). This research was also partially funded by EXPL2021CIMO_01.
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Afonso, I.S., Duarte, C., Ribeiro, A., Amaral, J.S., Ribeiro, J. (2023). Didactic Analysis of Olive Mill Wastewaters Antimicrobial Activity. In: García-Peñalvo, F.J., García-Holgado, A. (eds) Proceedings TEEM 2022: Tenth International Conference on Technological Ecosystems for Enhancing Multiculturality. TEEM 2022. Lecture Notes in Educational Technology. Springer, Singapore. https://doi.org/10.1007/978-981-99-0942-1_47
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