RT info:eu-repo/semantics/article
T1 Critical Assessment of the Nanofiltration for Reusing Brackish Effluent from an Anaerobic Membrane Bioreactor
A1 Vera Peña, Luisa María
A1 Gonz´alez, E.
A1 Ruigómez, I.
A1 Gómez, J.
A1 Marrero, M.C.
A1 Díaz,  F.
A1 Delgado, S.
A2 Ingeniería Química y Tecnología Farmacéutica
A2 Grupo de investigación en Tratamiento y Reutilización de Aguas
K1 fouling
K1 pharmaceutically active compounds
K1 municipal wastewater
K1 nanofiltration
AB In this study, a saline effluent from an anaerobic mem-brane bioreactor was treated by nanofiltration in order toallow its agricultural reuse. Short-term tests were conductedto investigate membrane fouling and selective rejection ofions and emerging organic contaminants (EOCs). The studyhas been conducted with a negatively charged commercialthin-film composite membrane (DK, GE Osmonics). The effectof operating pressure (5–20 bar) and cross-flow velocity(0.12–0.37 m/s) on membrane performance have beenresearched. Dimensional analysis of steady permeate fluxindicated that the gel layer or the polarization layer can becompletely removed at critical cross-flow velocity. At a sub-critical velocity, membrane autopsies by scanning electronmicroscopy (SEM) and energy dispersive X-Ray spectroscopyrevealed a complex mixture of organic matter, phosphatesand colloidal silica over the membranes surface. Since therejection of monovalent cations (76–88%) was lower thanthat of multivalent cations (above 96%), the treated effluentwas characterized by a very high levels of sodium adsorptionratio and ammonium. In addition, moderate rejection oflow molecular weight EOCs (clofibric acid and caffeine) wasobserved. Therefore, the treated effluent did not achieveenough quality to be reused for agricultural irrigation. VC2017 American Institute of Chemical Engineers EnvironProg, 37: 383–390, 2018During the last decade, interest in the application ofnanofiltration in wastewater treatment has grown inresponse to stringent water quality standards and increasingconcern about the presence of emerging organic contami-nants (EOCs). Nevertheless, information remains scarceabout membrane fouling and EOCs rejection. The currentresearch addresses these issues during its application to abrackish effluent from an anaerobic membrane bioreactor tobe reused for agricultural irrigation. Dimensional analysishas allowed establishing the optimum operation conditionsin terms fouling control. As regard of EOCs rejection, lowmolecular weight compounds were not completely retainedby the membrane.
YR 2018
FD 2018
LK http://riull.ull.es/xmlui/handle/915/39936
UL http://riull.ull.es/xmlui/handle/915/39936
LA en
NO DOI 10.1002/ep.12689No se publicó en abierto
DS Repositorio institucional de la Universidad de La Laguna
RD 27-mar-2025