Industrial wastewaters are generally discharged to water bodies after treatment. However, in most cases, industrial wastewater effluents are highly contaminated with organic matter and threaten to pollute the receiving environment. Advanced oxidation processes (AOPs) have received significant attention in recent years as a promising technology for the degradation of recalcitrant organic compounds that are not treatable by conventional techniques. The main objective of this work was to evaluate the feasibility of a Multi-Barrier Treatment (MBT) process for the post-treatment of plywood mill effluent on a pilot scale. The MBT process included filtration, an H2O2/UVC step and catalytic wet peroxide oxidation (CWPO) process using granular activated carbon (GAC). In addition, synthetic industrial wastewater (SIWW) was used to test the scaling-up parameters and performance in discontinuous and continuous mode for the H2O2/UVC process. Parameters, such as dose that was accumulated by water can be used for scaling up the H2O2/UVC process. Under optimal operational conditions (H2O2:TOC mass ratio 5) for SIWW, a similar level of organic compounds degradation can be reached at discontinuous and continuous modes of the H2O2/UVC process at an analogous UVC dose accumulated by water. The feasibility of the MBT process for the post-treatment of industrial wastewater effluent was confirmed as leading to 89%, 76%, 88.5% and 70% of suspended solids, TOC, COD and turbidity removal, respectively. The concentrations of tannic acid and H2O2 after MBT were below the detection limit, suggesting full elimination. Based on preliminary estimations, the operation and maintenance cost (O&M) of the MBT process is 0.95 (sic) m(-3). (C) 2015 Elsevier B.V. All rights reserved.