title: Modeling the improvement of ultrafiltration membrane mass transfer when using biofiltration pretreatment in surface water applications.
abstract: In surface water treatment, ultrafiltration (UF) membranes are widely used because of their ability to supply safe drinking water. Although UF membranes produce high-quality water, their efficiency is limited by fouling. Improving UF filtrate productivity is economically desirable and has been attempted by incorporating sustainable biofiltration processes as pretreatment to UF with varying success. The availability of models that can be applied to describe the effectiveness of biofiltration on membrane mass transfer are lacking. In this work, UF water productivity was empirically modeled as a function of biofilter feed water quality using either a quadratic or Gaussian relationship. UF membrane mass transfer variability was found to be governed by the dimensionless mass ratio between the alkalinity (ALK) and dissolved organic carbon (DOC). UF membrane productivity was optimized when the biofilter feed water ALK to DOC ratio fell between 10 and 14.
authors.affiliation: Department of Civil, Environmental, and Construction Engineering, University of Central Florida, 4000 Central Florida Blvd., Engineering II Ste. 211, Orlando, FL 32816, United States. Electronic address: andrea.netcher@tetratech.com.
authors.forename: Andrea C
authors.initials: AC
authors.lastname: Netcher
authors.affiliation: Department of Civil, Environmental, and Construction Engineering, University of Central Florida, 4000 Central Florida Blvd., Engineering II Ste. 211, Orlando, FL 32816, United States. Electronic address: steven.duranceau@ucf.edu.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Duranceau
mesh_terms: D001419:Bacteria / Q000302:isolation & purification*; D060766:Drinking Water; D006812:Humic Substances; D008566:Membranes; D008567:Membranes, Artificial; D008962:Models, Theoretical; D008970:Molecular Weight; D016011:Normal Distribution; D011108:Polymers / Q000737:chemistry; D011312:Pressure; D013696:Temperature; D014462:Ultrafiltration / Q000379:methods*; D014867:Water / Q000737:chemistry*; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D060766:Drinking Water; D006812:Humic Substances; D008567:Membranes, Artificial; D011108:Polymers; D014874:Water Pollutants, Chemical; D014867:Water
keywords: Biofiltration; Fouling; Membrane mass transfer; Pretreatment; Surface water; Ultrafiltration