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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/45016

Title: On The Relationship between Suspended Solids of Different Size, the Observed Boundary Flux and Rejection Values for Membranes Treating a Civil Wastewater Stream
Authors: Stoler, Marco
Ochando-Pulido, Javier Miguel
Palma, Luca
Issue Date: 2014
Abstract: Membrane fouling is one of the main issues in membrane processes, leading to a progressive decrease of permeability. High fouling rates strongly reduce the productivity of the membrane plant, and negatively affect the surviving rate of the membrane modules, especially when real wastewater is treated. On the other hand, since selectivity must meet certain target requirements, fouling may lead to unexpected selectivity improvements due to the formation of an additional superficial layer formed of foulants and that act like a selective secondary membrane layer. In this case, a certain amount of fouling may be profitable to the point where selectivity targets were reached and productivity is not significantly affected. In this work, the secondary clarifier of a step sludge recirculation bioreactor treating municipal wastewater was replaced by a membrane unit, aiming at recovering return sludge and producing purified water. Fouling issues of such a system were checked by boundary flux measurements. A simple model for the description of the observed productivity and selectivity values as a function of membrane fouling is proposed.
Publisher: MPDI
Keywords: Membrane fouling
Membrane selectivity
Boundary flux
Wastewater treatment
URI: http://hdl.handle.net/10481/45016
ISSN: 2077-0375
Citation: Stoller, M.; Pulido, J.M.O.; Palma, L.D. On The Relationship between Suspended Solids of Different Size, the Observed Boundary Flux and Rejection Values for Membranes Treating a Civil Wastewater Stream. Membranes 2014, 4, 414-423. [http://hdl.handle.net/10481/45016]
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