Low-temperature thermal regeneration and solvent regeneration-ultrasonic wave/persulfate regeneration coupled powdered activated carbon composite regeneration method

Abstract

The invention discloses a low-temperature thermal regeneration and solvent regeneration-ultrasonic wave / persulfate regeneration coupled powdered activated carbon composite regeneration method, and belongs to the field of water treatment and material regeneration and reuse. Easily-desorbed pollutants and difficultly-desorbed pollutants are classified according to the overall characteristics of the pollutants adsorbed by the powdered activated carbon, the easily-desorbed pollutants are fully desorbed by utilizing a low-temperature thermal regeneration process, and then liquid phase regeneration and advanced oxidation regeneration technologies are adopted for the difficultly-desorbed pollutants. Pollutants difficult to desorb are efficiently degraded and desorbed through combination of heating-enhanced liquid phase regeneration and ultrasonic / persulfate coupled advanced oxidation regeneration, and a composite regeneration method combining low-temperature thermal regeneration with solvent regeneration and ultrasonic / persulfate regeneration is formed. On the premise of guaranteeing the overall regeneration rate of the powdered activated carbon, the regeneration temperature in the thermal regeneration process can be obviously reduced, the thermal regeneration time is shortened, and the carbon loss rate is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for regenerating waste powdered activated carbon for water treatment, in particular to a composite regeneration method for powdered activated carbon coupled with low-temperature thermal regeneration and solvent regeneration-ultrasonic wave / persulfate regeneration. Background technique [0002] Activated carbon has a large specific surface area and rich pore structure, which is an efficient and green adsorption material. Among them, powdered activated carbon has a large specific surface area, strong adsorption capacity, wide application range, easy operation, and strong universality, and has been widely used in the field of water treatment. During use, the adsorption performance of activated carbon will gradually decrease until it becomes saturated activated carbon. Due to the complicated adsorption process, saturated powdered activated carbon often a...

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Problems solved by technology

Under the premise of ensuring the overall regeneration rate of powdered activated carbon, the regeneration temperature of the thermal regeneration process can be significantly reduced, the thermal regeneration time is shortened, and the carbon loss rate is significantly reduced, which solves the problems of traditional thermal regeneration methods of saturated powdered activated carbon to varying degrees. High carbon loss rate, high energy consumption, complex equipment, high cost, serious secondary pollution and other problems