Removal of emerging trace organic contaminants by MBR-based hybrid treatment processes |
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| Affiliation: | 1. Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia;2. Strategic Water Infrastructure Laboratory, School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia;1. Department of Environmental Engineering – Universidade Federal da Bahia, 40210-630, Salvador, BA, Brazil;2. Department of Civil Engineering – Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil;3. Department of Sanitary and Environmental Engineering – Universidade Federal de Minas Gerais, 30270-901, Belo Horizonte, MG, Brazil;4. Pontifícia Universidade Católica de Minas Gerais - Engineering School, Building 03, Rua Dom José Gaspar, 500 - Coração Eucarístico, 30535-901, Belo Horizonte, Minas Gerais, Brazil;1. RWTH Aachen University, Chemical Process Engineering, Forckenbeckstr. 51, 52074 Aachen, Germany;2. Universitat Politècnica de València, IEC Group, Departament d’Enginyeria Quimica i Nuclear, Camí de Vera s/n, 46022 València, Spain;3. EnviroChemie GmbH, In den Leppsteinswiesen 9, 64380 Rossdorf, Germany;4. DWI Interactive Materials Research, Forckenbeckstr. 50, 52074 Aachen, Germany;5. Chemical Technology Laboratory, PPGECAM/CT, Federal University of Paraíba, João Pessoa, Brazil;1. Institute of Environmental Engineering & Nano-Technology, Tsinghua-Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, Guangdong, China;2. Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua-Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, Guangdong, China;3. School of Environment, Tsinghua University, Beijing, 100084, China;1. Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, 30270-901 Belo Horizonte, MG, Brazil;2. Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, 385748 Garching, Germany;1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China;2. CCID Consulting Co., Ltd, Beijing 100048, China;3. Wuxi Fortune Pharmaceutical Co. Ltd, Wuxi 214046, China;1. Strategic Water Infrastructure Lab, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia;2. Water Research Centre, University of New South Wales, Sydney, NSW 2052, Australia;3. Strategic Water Infrastructure Lab, School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia;4. Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan |
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| Abstract: | The aim of this study was to demonstrate the complementarity of combining membrane bioreactor (MBR) treatment with UV oxidation or high pressure membrane filtration processes such as nanofiltration (NF) or reverse osmosis (RO) for the removal of trace organic contaminants (TrOC). The results suggest that the removal mechanisms of TrOC by either UV oxidation or NF/RO membrane filtration differ significantly from those of an MBR system. Thus, they can complement MBR treatment very well to significantly improve the removal of TrOC. MBR treatment can effectively remove hydrophobic and readily biodegradable hydrophilic TrOC. The remaining hydrophilic and biologically persistent TrOC were shown to be effectively removed by either UV oxidation or NF/RO membrane filtration. The combination of MBR with UV oxidation or NF/RO membrane filtration resulted in a removal ranging from 85% to complete removal (or removal to below the analytical detection limit) of all 22 TrOC selected in this study. In particular, it is noteworthy that although MBR treatment and direct UV oxidation separately achieved low removal of carbamazepine (a widely reported problematic compound), the combination of these two processes resulted in more than 96% removal. |
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| Keywords: | Membrane bioreactor (MBR) Trace organic contaminants (TrOC) UV oxidation Nanofiltration Reverse osmosis |
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