title: Technical potential of microalgal bacterial floc raceway ponds treating food-industry effluents while producing microalgal bacterial biomass: An outdoor pilot-scale study.
abstract: To replace costly mechanical aeration by photosynthetical aeration, upflow anaerobic sludge blanket (UASB) effluent of food-industry was treated in an outdoor MaB-floc raceway pond. Photosynthetic aeration was sufficient for nitrification, but the raceway effluent quality was below current discharge limits, despite the high hydraulic retention time (HRT) of 35days. Hereafter, conventional activated sludge (CAS) effluent of food-industry was treated in this pond to recover phosphorus. The two-day HRT results in a more realistic pond area, but the phosphorus removal efficiency was low (20%). High biomass productivities were obtained, i.e. 31.3 and 24.9ton total suspended solids hapond(-1)year(-1) for UASB and CAS effluent, respectively. Bioflocculation enabled successful harvesting of CAS effluent-fed MaB-flocs by settling and filtering at 150-250μm to 22.7% total solids. To conclude, MaB-floc raceway ponds cannot be recommended as the sole treatment for these food-industry effluents, but huge potential lies in added-value biomass production.
authors.affiliation: Laboratory of Industrial Water and Ecotechnology (LIWET),(2) Department of Industrial Biological Sciences, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium; Centro Nacional de Acuicultura e Investigaciones Marinas, CENAIM,(3) Facultad de Ciencias de la Vida, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, Km 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador. Electronic address: shende@espol.edu.ec.
authors.forename: Sofie
authors.initials: S
authors.lastname: Van Den Hende
authors.affiliation: Laboratory of Industrial Water and Ecotechnology (LIWET),(2) Department of Industrial Biological Sciences, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium.
authors.forename: Veerle
authors.initials: V
authors.lastname: Beelen
authors.affiliation: Laboratory of Industrial Water and Ecotechnology (LIWET),(2) Department of Industrial Biological Sciences, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium; Ecole des Métiers de l'Environnement (EME),(4) Campus de Ker Lann, Avenue Robert Schuman, F-35170 Bruz, France.
authors.forename: Lucie
authors.initials: L
authors.lastname: Julien
authors.affiliation: Laboratory of Industrial Water and Ecotechnology (LIWET),(2) Department of Industrial Biological Sciences, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium; Ecole des Métiers de l'Environnement (EME),(4) Campus de Ker Lann, Avenue Robert Schuman, F-35170 Bruz, France.
authors.forename: Alexandra
authors.initials: A
authors.lastname: Lefoulon
authors.affiliation: Alpro,(5) Vlamingstraat 28, B-8560 Wevelgem, Belgium.
authors.forename: Thomas
authors.initials: T
authors.lastname: Vanhoucke
authors.affiliation: Alpro,(5) Vlamingstraat 28, B-8560 Wevelgem, Belgium.
authors.forename: Carlos
authors.initials: C
authors.lastname: Coolsaet
authors.affiliation: Centro Nacional de Acuicultura e Investigaciones Marinas, CENAIM,(3) Facultad de Ciencias de la Vida, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, Km 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador.
authors.forename: Stanislaus
authors.initials: S
authors.lastname: Sonnenholzner
authors.affiliation: Laboratory of Industrial Water and Ecotechnology (LIWET),(2) Department of Industrial Biological Sciences, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium; Ghent University, Centre for Advanced Process Technology for Urban Resources (CAPTURE), B-9000 Ghent, Belgium.
authors.forename: Han
authors.initials: H
authors.lastname: Vervaeren
authors.affiliation: Laboratory of Industrial Water and Ecotechnology (LIWET),(2) Department of Industrial Biological Sciences, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium.
authors.forename: Diederik P L
authors.initials: DP
authors.lastname: Rousseau
mesh_terms: D018533:Biomass; D019649:Food Industry; D058086:Microalgae; D010788:Photosynthesis; D010865:Pilot Projects; D061005:Ponds / Q000382:microbiology*; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage
keywords: Algae; Bioflocculation; MaB-floc; Nitrification; Phosphorus; Wastewater