2026-04-21T05:22:24Zhttps://riubu.ubu.es/oai/request

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 2024-01-10T08:54:45Z 2024-01-10T08:54:45Z 2020-07 1369-703X http://hdl.handle.net/10259/8278 10.1016/j.bej.2020.107558 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. The authors gratefully acknowledge financial support provided by TCUE 2015–2017 cofounded by European Regional Development Fund (ERDF) and Junta de Castilla y León and the inestimable collaboration of Campofrio Frescos and Grupo Ecoalia. application/pdf eng Elsevier Biochemical Engineering Journal. 2020, V. 159, 107558 https://doi.org/10.1016/j.bej.2020.107558 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Submerged filtration External filtration Anaerobic membrane bioreactor Gas-lift mode Shear stress Fouling rate Ingeniería química Bioquímica Chemical engineering Biochemistry Comparison of external and submerged membranes used in anaerobic membrane bioreactors: Fouling related issues and biological activity info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Biochemical Engineering Journal 159 107558