Hybrid Fenton Oxidation Processes with Packed Bed or Fluidized Bed Reactor for the Treatment of Organic Pollutants in Wastewater: A Review

Advanced oxidation processes (AOPs) are emerging techniques for the treatment of wastewater. Among various processes under AOPs, Fenton-related processes have a significant effect on organic compound degradation as it nonselectively degrades the organic pollutants present in the wastewater. The major problems with the conventional Fenton process involve large amount of sludge generation, which requires further treatment and disposal, leaching of catalyst species, and high chemical consumption. To address these issues, mass transfer and process intensification of this process by application of continuous reactors like fluidized bed and packed bed will be extremely helpful. This review article provides an overview of the recent application of packed bed and fluidized bed reactor coupled with Fenton-related processes for the treatment of synthetic and industrial wastewater. This report also provides useful information and recommendations to the readers for further research in this area.