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http://dx.doi.org/10.5657/kfas.2002.35.5.469

Water Treatment and Oxygen Transfer by Rotating Biological Contactor in Pilot-Scale Recirculating Aquaculture System  

Suh Kuen Hack (Department of Chemical Engineering, Pukyong National University)
Kim Byong Jin (Busan Bio-industry Support Center)
Lee Jung Hoon (Department of Chemical Engineering, Pukyong National University)
Kim Yong Ha (Department of Chemical Engineering, Pukyong National University)
Lee Seok Hee (Department of Chemical Engineering, Pukyong National University)
Kim Sung Koo (Department of Biotechnology and Bioengineering, Pukyong National University)
Jo Jea Yoon (Department of Aquaculture, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.35, no.5, 2002 , pp. 469-475 More about this Journal
Abstract
The rotating biological contactor (RBC) was tested for treatment of aquacultural water in a pilot-scale recirculating aquaculture system. Performance of RBC on the treatment of nitrogen source such as total ammonia nitrogen (TAN), nitrite nitrogen and nitrate nitrogen and chemical oxygen demand (CODcr.) was evaluated. A system was stocked with nile tilapia at an initial rearing densities of $5\%$ and $7\%$ over 30 days. As increasing rearing density from $5\%$ to $7\%$, the TAN removal rates was increased from $39.4 g/m^3{\cdot}day$ to $86.0 g/m^3{\cdot}day$. But TAN removal efficiency was decreased from $24.5\%$ to $16.0\%$. The removal rate of $COD_Cr$ was higher than TAN. The RBC as an aerator was also evaluated for increasing dissolved oxygen concentration. For $5\%$ and $7\%$ of rearing density, the average aeration rate were $280 g/m^3{\cdot}day$ and $255 g/m^3{\cdot}day$, respectively.
Keywords
Rotating biological; contactor; Recirculating aquaculture system; Nile tilapia; Total ammonia nitrogen; Chemical oxygen demand; Dissolved oxygen;
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