Overview of Advance oxidation process for the tertiary treatment of pulp and paper industry wastewater

Abstract

the wastewater generated from the pulp and paper industry are potentially pollutant, because of their large
volume and their refractory nature. Biological treatment generally is not capable to remove these compounds.
Advanced oxidation processes (AOPs) constitute a promising technology for the treatment of pulp and paper industry
wastewaters containing non removable organic compounds. All AOP are designed to produce hydroxyl radicals HO•.
It is the hydroxyl radicals that act with high efficiency to destroy organic compounds. Generation of HO• is commonly
accelerated by combining oxidizing agents. AOP combine ozone (O3), ultraviolet (UV), hydrogen peroxide (H2O2)
and/or catalyst to offer a powerful wastewater treatment solution for the reduction and/or removal of residual organic
compounds as measured by COD. This paper presents a general review of efficient advanced oxidation processes
developed to decolorize and/or degrade organic pollutants for environmental protection. Fundamentals and main
applications of typical methods such as UV radiation plus hydrogen peroxide (UV/H2O2), Fenton's reagent (H2O2/Fe+2),
photo-Fenton (UV/H2O2/Fe+2), and ozone in different combinations (O3/UV; O3/H2O2) is discussed