title: Oily wastewater treatment by ultrafiltration using Taguchi experimental design.
abstract: In this research, results of an experimental investigation on separation of oil from a real oily wastewater using an ultrafiltration (UF) polymeric membrane are presented. In order to enhance the performance of UF in API separator effluent treatment and to get more permeation flux (PF), effects of operating factors on the yield of PF were studied. Five factors at four levels were investigated: trans-membrane pressure (TMP), temperature (T), cross flow velocity (CFV), pH and salt concentration (SC). Taguchi method (L(16) orthogonal array (OA)) was used. Analysis of variance (ANOVA) was applied to calculate sum of square, variance, error variance and contribution percentage of each factor on response. The optimal levels thus determined for the four influential factors were: TMP, 3 bar; T, 40˚C; CFV, 1.0 m/s; SC, 25 g/L and pH, 8. The results showed that CFV and SC are the most and the least effective factors on PF, respectively. Increasing CFV, TMP, T and pH caused the better performance of UF membrane process due to enhancement of driving force and fouling residence. Also, effects of oil concentration (OC) in the wastewater on PF and total organic carbon (TOC) rejection were investigated. Finally, the highest TOC rejection was found to be 85%.
authors.affiliation: Research Centre for Membrane Separation Processes, Iran University of Science and Technology, Narmak, Tehran, Iran. hamidsalahieng@gmail.com
authors.forename: A
authors.initials: A
authors.lastname: Salahi
authors.forename: T
authors.initials: T
authors.lastname: Mohammadi
mesh_terms: D000704:Analysis of Variance; D004784:Environmental Monitoring; D005163:Factor Analysis, Statistical; D007220:Industrial Waste / Q000032:analysis*; D008567:Membranes, Artificial; D010578:Petroleum / Q000032:analysis; D011108:Polymers / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D008567:Membranes, Artificial; D010578:Petroleum; D011108:Polymers; D014874:Water Pollutants, Chemical