This paper reports on the potential use of wet and dried Fenton sludge in replacement of the ferrous salt in treating Palm Oil Mill Secondary Effluent (POMSE) sample. The aims of this study were to characterize the Fenton sludge and to compare the performances of wet and dried Fenton sludge as iron sources in treating POMSE. The Fenton sludge were used to replace the Ferrous salt in R1- R5 and the results were compared with treatment used only H2O2 (non-catalyze). The optimum condition was run prior to tests and was found to be pH 3, H2O2/COD 1.59 (weight ratio) and Fe/COD 1.0 (weight ratio). Findings showed the removal of COD, color, turbidity and TSS in recycle wet Fenton sludge were ranging from 62% - 79%, 24% - 50%, 46% -74% and 62% - 73% respectively, while dried Fenton sludge treatment were ranging from 34% - 40%, 26% - 43%, 39% - 45% and 54% - 57% respectively. On the other hand, treatment with H2O2 showed approximately 60% removal for both COD and color while approximately 79% for both turbidity and TSS respectively. In conclusion recycled wet Fenton sludge treatment demonstrated higher removal of contaminant compared to the recycle dried Fenton sludge treatment.