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The management of sawdust waste and its disposal is a herculean task in developing countries like Nigeria due to factors such as lack of appropriate infrastructure, funds and expertise. Consequences are land contamination and air pollution due to indiscriminate dumping and open air burning. For this study, sawdust waste was activated using phosphoric acid resulting in a form of activated carbon. The activated sawdust formed was used in the treatment of aquaculture wastewater effluent utilizing a batch process approach. Physiochemical parameters of the wastewater investigated before and after treatment were TSS, pH, BOD and COD. Results obtained indicated that activated sawdust can reduce the value of these parameters significantly to enable aquaculture wastewater to be discharged safely. [ABSTRACT FROM AUTHOR]