title: Physical properties and Extracellular Polymeric Substances pattern of aerobic granular sludge treating hypersaline wastewater.
abstract: The modification of the physical properties of aerobic granular sludge treating fish-canning wastewater is discussed in this paper. The structure and composition of the Extracellular Polymeric Substances (EPSs) were analyzed at different salinity levels and related to granules stability. Results outlined that the total EPSs content increased with salinity, despite the EPSs increment was not proportional to the salt concentration. Moreover, the EPSs structure was significantly modified by salinity, leading to a gradual increase of the not-bound EPSs fraction, which was close to the 50% of the total EPSs content at 75gNaClL-1. The increasing salt concentration modified also the EPSs composition, causing the gradual reduction of protein content resulting in a decrease of granule hydrophobicity. The results pointed out that the granules stability significantly reduced above 50gNaClL-1, suggesting the existence of a salinity threshold above which granules stability is compromised.
authors.affiliation: Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy.
authors.forename: Santo Fabio
authors.initials: SF
authors.lastname: Corsino
authors.affiliation: Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy. Electronic address: marco.capodici@unipa.it.
authors.forename: Marco
authors.initials: M
authors.lastname: Capodici
authors.affiliation: Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Torregrossa
authors.affiliation: Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy.
authors.forename: Gaspare
authors.initials: G
authors.lastname: Viviani
mesh_terms: D000332:Aerobiosis; D001704:Biopolymers / Q000737:chemistry*; D019149:Bioreactors; D005525:Food-Processing Industry; D057927:Hydrophobic and Hydrophilic Interactions; D054712:Salinity; D012722:Sewage / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D001704:Biopolymers; D012722:Sewage; D012965:Sodium Chloride; D062065:Wastewater
keywords: Aerobic granular sludge; EPS; Fish-canning wastewater; Hypersaline wastewater; Industrial wastewater