Challenges of aerobic granular sludge utilization: Fast start-up strategies and cationic pollutant removal.

Autor:	Guzmán-Fierro V; Department of Chemical Engineering, Faculty of Engineering, University of Concepción, Concepción, Chile., Arriagada C; Department of Chemical Engineering, Faculty of Engineering, University of Concepción, Concepción, Chile., Gallardo JJ; Department of Chemical Engineering, Higher Engineering School, University of Almería, Spain., Campos V; Department of Microbiology, Faculty of Biological Sciences, University of Concepción, Concepción, Chile., Roeckel M; Department of Chemical Engineering, Faculty of Engineering, University of Concepción, Concepción, Chile.
Jazyk:	angličtina
Zdroj:	Heliyon [Heliyon] 2023 Feb 09; Vol. 9 (2), pp. e13503. Date of Electronic Publication: 2023 Feb 09 (Print Publication: 2023).
DOI:	10.1016/j.heliyon.2023.e13503
Abstrakt:	Aerobic granular sludge (AGS) is a self-aggregated microorganism consortium with pollutant removal properties. The aim of this work is to study and review the application of aerobic granules for water treatment with special focus on new applications and methodologies. Carbon-nitrogen containing pollutants are the classic targets of AGS technology. Carbon and nitrogen removal of AGS are classified as a biodegradation process. More recently, the AGS granules have been studied as sorbent materials for wastewater treatment. In particular, the sorption of cationic pollutants has been studied through biosorption and bioaccumulation mechanisms without distinguishing when one or the other process is involved. AGS conformation made them suitable for complex wastewater treatment. Indeed, several studies have demonstrated the removal of polyvalent cationic pollutants even with higher capacity than conventional sorbent materials. However, this was achieved almost exclusively for synthetic substrates, with single cation evaluation and using in some cases only qualitative measures. For successful industrial AGS application in complex substrates, it is necessary to evaluate and demonstrate the technology in real industrial conditions and reduce the currently long start-up times which limits its utility. Two new strategies have been proposed: autoinducer molecules and the production of artificial granular from common active sludge with commercial alginate. Finally, the increase of research on AGS cations assimilation properties will allow a new point of view, where granules will be materials for the recovery of valuable metals from industrial wastewater streams. Competing Interests: The authors declare no competing interests. (© 2023 Universidad de Concepción, Chile.)
Databáze:	MEDLINE
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