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oai:riubu.ubu.es:10259/82782024-01-11T01:05:23Zcom_10259_4244com_10259_5086com_10259_2604com_10259_4402col_10259_4245col_10259_6209

Martínez Díaz, Raquel Ruiz Pérez, María Olga Ramos Rodríguez, Cipriano Cámara Nebreda, José María Diez Blanco, Victorino Submerged filtration External filtration Anaerobic membrane bioreactor Gas-lift mode Shear stress Fouling rate Anaerobic sludge filtration tests were performed with two experimental set-ups equipped with either submerged hollow-fiber membranes or external tubular membranes operated with low crossflow velocity and gas sparging in a gas-lift mode. Particle size distributions, extracellular polymeric substance concentrations, methanogenic activity, reversible and irreversible fouling rates, and chemical cleaning efficiency were all studied and compared. An increase in the percentage of smaller particles and a decrease in the concentration of volatile suspended solids in the external membrane set-up were observed. Both soluble protein and soluble polysaccharide concentrations were also higher in the external filtration. Operating at 12–15 L/m2 h for 7 days, the total resistance of the external membrane reached 9.3 × 1012 m−1, while the resistance of submerged membrane reached 1.1 × 1012 m−1 despite operating at 15–25 L/m2 h for 12 days. Finally, the type of fouling and the efficiency of chemical cleaning also differed in both configurations. 2024-01-10 2024-01-10 2020-07 info:eu-repo/semantics/article 1369-703X http://hdl.handle.net/10259/8278 10.1016/j.bej.2020.107558 eng Biochemical Engineering Journal. 2020, V. 159, 107558 https://doi.org/10.1016/j.bej.2020.107558 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier