Membrane electro-oxidizer: A new hybrid membrane system with electrochemical oxidation for enhanced organics and fouling control
| Autor: | Kwang-Ho Choo, Hyung-June Park, Naresh Mameda |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Color Industrial Waste 02 engineering and technology Wastewater 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Electrochemical cell Dioxanes chemistry.chemical_compound Coloring Agents Hydrogen peroxide Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Biological Oxygen Demand Analysis Fouling mitigation Chromatography Fouling Ecological Modeling Chemical oxygen demand Membrane fouling Membranes Artificial Electrochemical Techniques 021001 nanoscience & nanotechnology Pollution Membrane chemistry Chemical engineering Textile Industry Chromatography Gel Chlorine 0210 nano-technology Oxidation-Reduction |
| Zdroj: | Water Research. 126:40-49 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2017.09.009 |
| Popis: | The synergistic combination of membrane filtration with advanced oxidation is of particular interest for next-generation wastewater treatment technologies. A membrane electro-oxidizer (MEO) hybridizing a submerged microfilter and an electrochemical cell was developed and investigated for tertiary treatment of secondary industrial (textile) wastewater effluent. Laboratory- and pilot-scale MEO systems were designed and evaluated for treatment efficiency and membrane fouling control. The MEO achieved substantial removal of color (50-90%), turbidity (>90%), and bacteria (>4 log) as well as chemical oxygen demand (13-31%) and 1,4-dioxane (∼25-53%). Fluorescence-based parallel factor analysis disclosed the degradation of humic-like organics with fluorophores. Size exclusion chromatograms with organic carbon detection confirmed the removal of specific organic molecules with ∼100 Da. While investigating the effects of oxidant quenching agents, reactive chlorine species and hydrogen peroxide were found to be most responsible for the anodic oxidation of secondary effluent organics. The efficacy of membrane fouling mitigation by the MEO was greater when higher electric current densities were applied, but was not dependent on the number of electrochemical cells installed. The MEO is a promising technology for enhanced organics removal with simultaneous fouling control due to its multifunctional active oxidants. |
| Databáze: | OpenAIRE |
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