title: Performance of Hybrid Photocatalytic-Ceramic Membrane System for the Treatment of Secondary Effluent.
abstract: Evaluation of an advanced wastewater treatment system that combines photocatalysis with ceramic membrane filtration for the treatment of secondary effluent was undertaken. The results showed that, after photocatalysis and ceramic membrane filtration, the removal of dissolved organic carbon and UV254was 60% and 54%, respectively, at a concentration of 4 g/L of TiO₂. Dissolved organic matter (DOM) present in the secondary effluent was characterised with a liquid chromatography-organic carbon detector (LC-OCD) technique. The results showed low removal of humics, building blocks, the other oxidation by-products and no removal of biopolymers after TiO₂/UV photocatalytic treatment. This suggested that the radical non-selective oxidation mechanisms of TiO₂/UV process resulted in secondary effluent in which all of the DOM fractions were present. However, the hybrid system was effective for removing biopolymers with the exception of low molecular weight (LMW) compounds acids, which accumulated from the beginning of the reaction. In addition, monitoring of the DOM fractions with LC-OCD analysis demonstrated that the reduction of the effluent aromaticity was not firmly correlated with the removal of humic substances for the combined processes.
authors.affiliation: Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, VIC 8001, Australia. songll1987@163.com.|College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China. songll1987@163.com.
authors.forename: Lili
authors.initials: L
authors.lastname: Song
authors.affiliation: Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, VIC 8001, Australia. Bo.Zhu@vu.edu.au.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhu
authors.affiliation: Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, VIC 8001, Australia. Stephen.Gray@vu.edu.au.
authors.forename: Stephen
authors.initials: S
authors.lastname: Gray
authors.affiliation: Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, VIC 8001, Australia. Mikel.Duke@vu.edu.au.
authors.forename: Mikel
authors.initials: M
authors.lastname: Duke
authors.affiliation: Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, VIC 8001, Australia. Shobha.Muthukumaran@vu.edu.au.
authors.forename: Shobha
authors.initials: S
authors.lastname: Muthukumaran
keywords: ceramic membrane; fouling; photocatalysis; secondary effluent; size exclusion chromatography