Fiberboard industrial wastewater sludge is a type of waste produced as a by-product of the wastewater treatment plant, which consists of organic matters that can turn into toxic and hazardous forms if left untreated. Hence, this study aims to remediate the sludge by using fungi bioaugmentation and solidification and stabilization (S/S) method in 7 days. This study focus on the degradation of organic contaminants based on leaching behaviour of Chemical Oxygen Demand (COD). Besides, the compressive strength was also measure for safe disposal. Aspergillus brasiliensis ATCC 16404 was used for fungi bioaugmentation of sludge and Portland cement was used as the binder in the S/S method. After a week, bioaugmentation method shows the lowest COD concentration (467mg/L). Whereas, higher COD concentration was detected for S/S method (550 mg/L). By using both methods, COD concentration was detected highest (570 mg/L) than single method. Since both methods were less successful in removing COD, it is highly recommended to conduct in longer duration for future work.