Kinetic study of seawater reverse osmosis membrane fouling
MetadataShow full item record
Reverse osmosis (RO) membrane fouling is not a static state but a dynamic phenomenon. The investigation of fouling kinetics and dynamics of change in the composition of the foulant mass is essential to elucidate the mechanism of fouling and foulant-foulant interactions. The aim of this work was to study at a lab scale the fouling process with an emphasis on the changes in the relative composition of foulant material as a function of operating time. Fouled membrane samples were collected at 8 h, and 1, 2, and 4 weeks on a lab-scale RO unit operated in recirculation mode. Foulant characterization was performed by CLSM, AFM, ATR-FTIR, pyrolysis GC-MS, and ICP-MS techniques. Moreover, measurement of active biomass and analysis of microbial diversity were performed by ATP analysis and DNA extraction, followed by pyro-sequencing, respectively. A progressive increase in the abundance of almost all the foulant species was observed, but their relative proportion changed over the age of the fouling layer. Microbial population in all the membrane samples was dominated by specific groups/species belonging to Proteobacteria and Actinobacteria phyla; however, similar to abiotic foulant, their relative abundance also changed with the biofilm age. © 2013 American Chemical Society.
Showing items related by title, author, creator and subject.
Khan, M.; Manes, C.; Croue, Jean-Philippe (2012)Reverse Osmosis (RO) membrane fouling is not a static state but a dynamic phenomenon. Investigation of fouling kinetics and dynamics of change in composition of the foulant mass, is essential to probe the mechanism of ...
Investigation of pre-treatment used for organic foulant removal from wastewater effluent on fouling of membranes used for wastewater treatment and reuseAryal, Ashok (2009)The volume of global water is very large. However, the source of water on the globe is finite and also distributed in quite uneven manner. In addition to this, freshwater source is dwindling and becoming scarce from human ...
In-line coagulation prior to UF of treated domestic wastewater - foulants removal, fouling control and phosphorus removalZheng, X.; Plume, S.; Ernst, M.; Croue, Jean-Philippe; Jekel, M. (2012)The present work investigated fouling control and phosphorus removal by applying in-line coagulation prior to ultrafiltration (UF) of treated domestic wastewater. Experiments were conducted in both lab- and pilot-scale ...