title: Single stage treatment of saline wastewater with marine bacterial-microalgae consortia in a fixed-bed photobioreactor.
abstract: Currently, the treatment of aquaculture-origin effluents is mainly performed through land-based recirculating aquaculture systems (RAS). In this study, we evaluate and introduce a novel immobilized/packed bed bioreactor which uses a synthetic textile as the support medium. A marine microbial consortium was developed on the textile by its inoculation with the microalgae Picochlorum sp. The bioreactor was tested with variable loadings of C and N and showed outstanding performance approaching removal rates up to 95% within a few hours (4-5h) of operation. Pyrosequencing analysis revealed a novel microbial consortium consisting mainly of chitrinomycetes, Pseudomonas sp. and the absence of β-proteobacteria, which is the Class encompassing autotrophic nitrifiers. Quantitative polymerase chain reaction further confirmed these findings suggesting heterotrophic nitrification and aerobic denitrification as the principal mechanisms of N-removal from the bioreactor. Overall our findings reveal the potential of the AdvanTex System for the treatment of marine aquaculture effluents-COD reduction and N-removal, in a single stage.
authors: School of Environmental Engineering, Technical University of Crete, Chania, Greece.
authors: P
authors: P
authors: Babatsouli
authors: School of Environmental Engineering, Technical University of Crete, Chania, Greece.
authors: S
authors: S
authors: Fodelianakis
authors: School of Environmental Engineering, Technical University of Crete, Chania, Greece.
authors: N
authors: N
authors: Paranychianakis
authors: School of Environmental Engineering, Technical University of Crete, Chania, Greece.
authors: D
authors: D
authors: Venieri
authors: DIALYNAS S.A., El. Venizelou 15, Chania, Greece.
authors: M
authors: M
authors: Dialynas
authors: School of Environmental Engineering, Technical University of Crete, Chania, Greece. Electronic address: nicolas.kalogerakis@enveng.tuc.gr.
authors: N
authors: N
authors: Kalogerakis
mesh_terms: D001419:Bacteria; D019149:Bioreactors; D058086:Microalgae; D010777:Photochemistry; D054712:Salinity; D062065:Wastewater / Q000737:chemistry*; D014871:Water Microbiology
chemical_list: D062065:Wastewater
keywords: Aerobic denitrification; Heterotrophic nitrification; Microalgae; Packed bed bioreactor; Recirculating aquaculture systems; Saline wastewater