Water treatment and performance characteristics evaluation of a pilot-scale recirculating aquaculture system
To minimize the impact on the environment and land requirements, a pilot-scale recirculating aquaculture system was engineered and investigated in a greenhouse. The system included a three-step particulates separation device, fluidized bed reactors (FBR), UV treatment and cooling. Japanese flounder (Paralichthys olivaceus) were raised from initial mean weight 4.9±0.6g to final mean weight 35.8±14.6g after140 days of growth. The specific growth rate was between 1.57 and 2.22 per day. Feed waste and excrement were removed by a three-step solids separation device. The sedimentation basin, hydrocyclone and foam fractionator showed 68.0％, 1.3％ and 30.7％ suspended solids removal efficiency, respectively, based on the influent and effluent concentrations. The measured solids concentrations in the fish tank were usually less than 8.24 mg/L. After fluidized bed biofilter maturation, the maximum TAN removal rate (Rmax) was 1666.7 mgNH4-N/m2/d and half saturation constant (KS) was 1.67.The concentration of NH4-N in the rearing water was variable cyclic fluctuation with lower than 0.505 mg/L. The concentration of NO2-N was controlled of lower than 0.208 mg/L. Based on these results, the pilot-scale recirculating aquaculture system remained good water quality for Japanese flounder production.
Recirculating aquaculture system Solids removal Fluidized bed reactor Nitrogen Phosphate Japanese flounder
Yan Zaisheng Liu Changfa Wang Shihe He Jie Liu Yuan Zhang Liyong Zhang Junxin
Department of Municipal Engineering, Southeast University, Nanjing,China College of Marine Environmental Engineering, Dalian Fisheries University, Dalian,China Key Laborator College of Marine Environmental Engineering, Dalian Fisheries University, Dalian,China
国际会议
上海
英文
2950-2953
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）