This paper describes a lab-scale recirculating aquaculture system (RAS) that reduces, recycles, and reuses wastewater from fish farms. A biological treatment unit, a settling tank, and a fish tank are all included in the system. For 21 days, four fish samples were housed in the tank. Then, for 16 days, highly concentrated fish farm wastewater was continuously recirculated to build up a significant mass of bacteria on the filter. The rationale for this is to guarantee that proper nitrification processes were in place before the fish were placed in the fish tank to be reared. The ammonia, nitrite, nitrate, dissolved oxygen, pH, and total suspended particles levels in RAS were all within permissible limits for African catfish culture, according to the results of water analysis. The RAS for the 21-day culture consumed 32.89L of water and resulted in a weight gain percentage ranging from 17.69% to 37.05%. This demonstrated that the system is capable of maintaining the required effluent quality for catfish production.
Author(S) Details
I. I. Nwajuaku
Department of Civil Engineering, Nnamdi Azikiwe University, Nigeria.
C. F. Okey-Onyesolu
Department of chemical Engineering, Nnamdi Azikiwe University, Nigeria.
Okeke Chukwunonso
Department of Civil Engineering, Nnamdi Azikiwe University, Nigeria.
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