title: Biotreatment of industrial olive washing water by synergetic association of microalgal-bacterial consortia in a photobioreactor.
abstract: This study presents an effective technology for the olive processing industry to remediate olive washing water. A 14.5-L enclosed tubular photobioreactor was inoculated with a stable microalgal-bacterial consortium obtained by screening strains well adapted to olive washing water. The capacity of an enclosed tubular photobioreactor to remove toxic compounds was evaluated under photosynthesis conditions and without any external supply of oxygen. The results showed that the dominant green microalgae Scenedesmus obliquus, Chlorella vulgaris and the cyanobacteria Anabaena sp. and bacteria present in olive washing water (i.e. Pantoea agglomerans and Raoultella terrigena) formed a synergistic association that was resistant to toxic pollutants present in the effluent and during the initial biodegradation process, which resulted in the breakdown of the pollutant. Total phenolic compounds, COD, BOD5, turbidity and colour removals of 90.3 ± 11.4, 80.7 ± 9.7, 97.8 ± 12.7, 82.9 ± 8.4 and 83.3 ± 10.4 %, respectively, were recorded in the photobioreactor at 3 days of hydraulic retention time. Graphical abstract Biotreatment of industrial olive washing water by synergetic association of microalgal-bacterial consortia in a photobioreactor.
authors.affiliation: Department of Microbiology and Institute of Water Research, University of Granada, Granada, Spain. paulamaza@ugr.es.|Departamento de Microbiología, Facultad de Farmacia, Campus de Cartuja s/n, 18071, Granada, Spain. paulamaza@ugr.es.
authors.forename: P
authors.initials: P
authors.lastname: Maza-Márquez
authors.affiliation: Department of Built Environment, School of Engineering, Aalto University, P.O. Box 15200, FI-00076, Espoo, Aalto, Finland.
authors.forename: A
authors.initials: A
authors.lastname: González-Martínez
authors.affiliation: Department of Microbiology and Institute of Water Research, University of Granada, Granada, Spain.
authors.forename: M V
authors.initials: MV
authors.lastname: Martínez-Toledo
authors.affiliation: Dipartimento di Scienze Ecologiche e Biologiche (DEB), University of Tuscia, Largo Universita s.n.c, 01100, Viterbo, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Fenice
authors.affiliation: Biotmicrogen S.L., Parque Tecnológico de Ciencias de la Salud, Granada, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Lasserrot
authors.affiliation: Department of Microbiology and Institute of Water Research, University of Granada, Granada, Spain.
authors.forename: J
authors.initials: J
authors.lastname: González-López
mesh_terms: D018407:Bacterial Physiological Phenomena; D001673:Biodegradation, Environmental; D018441:Biofilms; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005525:Food-Processing Industry; D007220:Industrial Waste / Q000032:analysis; D058086:Microalgae / Q000502:physiology*; D059013:Microbial Consortia; D031658:Olea / Q000737:chemistry; D058433:Photobioreactors; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D007220:Industrial Waste; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Microalgal-bacterial consortium; Non-metric multidimensional scaling (MDS); Olive washing water (OWW); Photobioreactor (PBR); Synergistic relationships