期刊
WATER RESEARCH
卷 126, 期 -, 页码 40-49出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2017.09.009
关键词
Membrane electro-oxidizer; Electrochemical cell; Hybrid process; Fouling mitigation; Oxidant formation
资金
- Korea Environmental Industry and Technology Institute - Korea Ministry of Environment [2015001640004]
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 (similar to 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 similar to 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. (C) 2017 Elsevier Ltd. All rights reserved.
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