A method and system for COD removal from nanofiltration concentrate

Abstract

This invention relates to the field of water treatment technology and discloses a method and system for COD removal from nanofiltration concentrate. The method includes: acquiring full-band UV-Vis absorption spectral data, inorganic anion concentration data, and reactor geometric parameters of the nanofiltration concentrate; subtracting inorganic salt interference from the spectrum and identifying organic components through Gaussian deconvolution peak decomposition; generating a multi-level oxidation parameter sequence based on a comprehensive halogenation risk index assessed by halogenation reaction activity evaluation and a risk-aware oxidation mode decision model; calculating focused ultrasonic control parameters on the electrode surface through acoustic field finite element simulation; performing staged electrocatalytic oxidation treatment, simultaneously monitoring zoned current density and targeted cleaning of local contaminants, and monitoring trihalomethane concentration online and dynamically adjusting the anode potential. This invention solves the problems of organic matter identification bias, chlorination byproduct formation, and electrode contamination in the treatment of high-salt, high-chlorine nanofiltration concentrate.

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