RT info:eu-repo/semantics/article
T1 Direct Membrane Filtration for Wastewater Treatment Using an Intermittent Rotating Hollow Fiber Module
A1 Vera Peña, Luisa María
A1 Ruigómez, Ignacio
A1 González, Enrique
A1 Rodríguez-Gómez, Luis
A2 Ingeniería Química y Tecnología Farmacéutica
A2 Grupo de investigación en Tratamiento y Reutilización de Aguas
K1 ultrafiltration
K1 mechanical shear
K1 threshold flux
K1 fouling
K1 shear-enhanced filtration
AB Direct membrane filtration of municipal wastewater has attracted a considerable interestin recent years. Preventing severe membrane fouling is a crucial issue in the process development.This paper aims to assess the effectiveness of a rotating hollow fiber module in enhancing foulingcontrol. The effect of rotation speed, intermittence and permeate flux was studied in short-term testsat lab-scale. A combined filtration model considering residual fouling, intermediate pore blockingand cake filtration was used to analyze the effect of the shear induced by rotation. Results showeda significant flux improvement by increasing rotation shear stress and showed a nearly linearcorrelation between the threshold flux (ranged between 12 and 32 L·h−1·m−2) and the rotation speed.A proper rotation intermittence (10/15 on/off) was found, which may maintain a fouling controlcomparable to that achieved for continuous rotation. For a given energy demand, the optimaloperating conditions involve high speeds (≥180 rev·min−1) with low to moderate intermittences.Analyzing the relative contribution of the different feedwater fractions on membrane fouling, colloidalparticles and macromolecules were found to be the main contributors.
YR 2020
FD 2020
LK http://riull.ull.es/xmlui/handle/915/39923
UL http://riull.ull.es/xmlui/handle/915/39923
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 27-dic-2024