RT info:eu-repo/semantics/article
T1 Comparison of external and submerged membranes used in anaerobic membrane bioreactors: Fouling related issues and biological activity
A1 Martínez Díaz, Raquel
A1 Ruiz Pérez, María Olga
A1 Ramos Rodríguez, Cipriano
A1 Cámara Nebreda, José María
A1 Diez Blanco, Victorino
K1 Submerged filtration
K1 External filtration
K1 Anaerobic membrane bioreactor
K1 Gas-lift mode
K1 Shear stress
K1 Fouling rate
K1 Ingeniería química
K1 Chemical engineering
K1 Bioquímica
K1 Biochemistry
AB 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.
PB Elsevier
SN 1369-703X
YR 2020
FD 2020-07
LK http://hdl.handle.net/10259/8278
UL http://hdl.handle.net/10259/8278
LA eng
NO 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.
DS Repositorio Institucional de la Universidad de Burgos
RD 22-dic-2024