title: Evaluation of anaerobic digestates from different feedstocks as growth media for Tetradesmus obliquus, Botryococcus braunii, Phaeodactylum tricornutum and Arthrospira maxima.
abstract: In this paper, two freshwater microalgae (Tetradesmus obliquus and Botryococcus braunii), a marine diatom (Phaeodactylum tricornutum) and a photosynthetic cyanobacterium (Arthrospira maxima) were investigated for their ability to grow on liquid digestates (LDs). Three LDs were obtained from anaerobic digestion of different organic wastes: zootechnical (ZW LD), vegetable biomass (VW LD) and the organic fraction of municipal solid wastes (MW LD). All the strains showed the same growth performance on VW LD as on the respective standard media (SM), while ZW LD was efficient only for growth of T. obliquus and B. braunii. MW LD was the poorest growth medium for all the strains. Data on nutrient removal efficiency showed that A. maxima and T. obliquus made the best use of NH4+-N with removal values ranging between 98.9-99.8%, while P. tricornutum and B. braunii showed values of 79.0 and 88.5% respectively. Applying repeated batch cultivation in photobioreactors, the biochemical composition of A. maxima and T. obliquus biomass grown on ZW LD and VW LD, showed an increase of lipid, carbohydrates and ash in both microalgae. Biomass biochemical profiles suggest possible applications in feed, chemicals and energy sectors.
authors.affiliation: CAISAL, University of Naples Federico II, Parco Gussone Ed 77, 80055 Portici, NA, Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Massa
authors.affiliation: CAISAL, University of Naples Federico II, Parco Gussone Ed 77, 80055 Portici, NA, Italy. Electronic address: silvia.buono@unina.it.
authors.forename: Silvia
authors.initials: S
authors.lastname: Buono
authors.affiliation: CAISAL, University of Naples Federico II, Parco Gussone Ed 77, 80055 Portici, NA, Italy.
authors.forename: Antonio Luca
authors.initials: AL
authors.lastname: Langellotti
authors.affiliation: CAISAL, University of Naples Federico II, Parco Gussone Ed 77, 80055 Portici, NA, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Castaldo
authors.affiliation: CAISAL, University of Naples Federico II, Parco Gussone Ed 77, 80055 Portici, NA, Italy.
authors.forename: Anna
authors.initials: A
authors.lastname: Martello
authors.affiliation: Department of Agriculture Science, Unit of Food Science and Technologies, Parco Gussone Ed 84, 80055 Portici, NA, Italy.
authors.forename: Antonello
authors.initials: A
authors.lastname: Paduano
authors.affiliation: Department of Agriculture Science, Unit of Food Science and Technologies, Parco Gussone Ed 84, 80055 Portici, NA, Italy.
authors.forename: Raffaele
authors.initials: R
authors.lastname: Sacchi
authors.affiliation: Food Quality Design, Wageningen University & Research Centre, POBox 8129, 6700 EV Wageningen, The Netherlands.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Fogliano
mesh_terms: D000693:Anaerobiosis; D018533:Biomass; D001709:Biotechnology; D000460:Chlorophyta / Q000254:growth & development / Q000378:metabolism*; D000458:Cyanobacteria / Q000254:growth & development / Q000378:metabolism*; D017377:Diatoms / Q000254:growth & development / Q000378:metabolism*; D058086:Microalgae / Q000378:metabolism*; D058433:Photobioreactors / Q000382:microbiology; D012037:Refuse Disposal; D062611:Solid Waste / Q000032:analysis; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry
chemical_list: D062611:Solid Waste; D062065:Wastewater
keywords: Anaerobic digestate; Biomass composition; Microalgae; Phytoremediation