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AWWA MTC57562
- Resistance and Diffusion Modeling for RO and NF Productivity and Water Quality
- Conference Proceeding by American Water Works Association, 03/05/2003
- Publisher: AWWA
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This paper describes model development of solute mass transfer in an integrated membranesystem (Hydranautics LFC1). The data was generated from the St. Johns River WaterManagement District (SJRWMD) Water Treatment Project. A wide spectrum of constituents insource waters is known to contribute to fouling. Membrane foulants are classified roughly intodissolved organic substances, colloidal or particulate matter, insoluble inorganic compounds, andbiological matter such as bacteria. In order to control organic and colloidal fouling, ferric sulfatecoagulation using Super Pulsator (SP) blanket clarifier followed by dual media gravity filtrationand Zenon (Z) immersed ultrafiltration were used. Monochloramine was used to preventbiofouling, while antiscalants were added to membrane feed water for scaling control. In thisstudy, the effects of these pretreatment processes are evaluated by monitoring membraneproductivity change over operating time. Furthermore, pretreatment water qualities arecorrelated to membrane performance through mass loading and/or resistance modeling. Includes 29 references, tables, figures.
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