Dauda, A. B.Akinwole, A. O.2023-12-112023-12-112015-09-26Abeysinghe, D.H., Shanableh, A. & Rigden, B. (1996). Biofilters for Water Reuse in Aquaculture. Water Science and Technology 34:253-260. Ajani. E.K., Akinwole, A.O. & Ayodele. I.A. (2011). Fundamentals of Fish Farming in Nigeria. Walecrown publishers Ibadan. 158pp. Akinwole, A.O. (2005). Effect of media size and depth on performance of sand filter for fish farm wastewater treatment. Ibadan Journal of Agricultural Research 1(1): 19-25. Akinwole. A.O. & Dauda, A.B. (20141. Performance of Palm Kernel Shell as Nitrification Media for Integrated Fish Culture Wastewater at Varying Drying Time. Global Journal ofScience Frontier Research: D, Agriculture Veterinary, htips://«ilohaliournals.or»/GJSl;R Volume 14 /4-Performance-ol-Palm-Kcrnel-Shcll.pdf Al-Hafedli. Y.S.. Alain, A.. & Alain. M.A. (2003). Performance of plastic biofilter media with different configuration in a water recirculation system for the culture of Nile tilapia (Oreochromis niloticus). Aquacultural Engineering, 29: 139-154. Blancheton, J.P. (2000). Developments in recirculation systems for Mediterranean fish species. Aquacultural Engineering, 22: 17- 31. Colt, J.E.. Lamourex, J., Patterson, R... & Rogers, G. (2006). Reporting standards for biofiiter performance studies. Aquacultural engineering, 34: 377 - 38S. Dauda, A.B., Akinwole, A.O., Olatinwo, L.K. (2014). Biodenitrification of aquaculture wastewater at different drying times in water reuse system. J.Agric. Food. Tech., 4(2): 6- 12. www.textroad.com FEPA (1988). Federal Environmental Protection agency Act. 153pp. Glass, C., Silverstein, J., Oh, J. (1997). Inhibition of Denitrification in Activated Sludge by Nitrite. Water Environmental Research, 69 (6): 1086-1093https://keffi.nsuk.edu.ng/handle/20.500.14448/3093Nitrification removes ammonia and Nitrite-Nitrogen (N0i-N) from aquaculture w a stew at u but lead to increase in the amount of Nitrate-Nitrogen (NCh-N) in the system. NOj-N though not toxic to fish at low concentration affects growth and yield at higher concentration thus making further denitrification of the waste water a necessity. This study investigated Polypropylene bio-block (PP) and Palm Kernel shell(PK) as biofilter media for the denitrification columns were used. Wastewater from African catfish (Clarias gariepinus) monoculture facility was ueat* “S"IS ' determine media. Selected water quality parameters were measured in effluent wastewater an lofi Ic,fi L ,moved,. the change in water quality. 'The denitrification efficiency was determined using and Volumetric N Percentage ( ./ oJn conversion rate(VNR). Data obtained were analyzed using t-test. The parameters in the filtrates were within the range recommended for aquaculture, water reuse and discharge into the environment, NO3-N in filtrates was reduced to 45 mg/L in PP and 25 mg/L in pk in the denitrification system.enBiofiliration, Deniirification. Effluents, Palm Kernel Shell polypropyleneArticle