Performance of different biofilters in a recirculating system for rainbow trout farming
Journal Title: Revista MVZ Cordoba - Year 2016, Vol 21, Issue 2
Abstract
Objective. To evaluate the performance of different biofilters in a recirculating aquaculture system (RAS) for trout farming. Materials and methods. It was used a 1m3 plastic tank for fries farming; fabric bags to solids retention; a submersible pump; a constant water level and flow distribution box; six up flow biofilters in 3” PVC tube; sand of D10=0.45mm as carrier. The reactors were operated at local temperature and with hydraulic retention time (HRT) of 11 min, the biofilters were inoculated in the next way: R1-Control: RAS water; R2-Fish culture farm sludges; R3- Water from aerated lagoon of Antanas landfill (AL); R4-Aquarium sediments; R5- Aerated lagoon of AL sludges; R6-Sludges from sulfidogenic reactor of AL. The weight gain (WG) and the food conversion (FC) were evaluated, some physic-chemical parameters were monitored and the nitrogen and suspended solids removal efficiency were evaluated. Results. The WG of the cultured animals was 1.58 g/d and the FC was 1.41. There were no differences for ammonium and nitrite removal between the reactors; the average removal efficiencies were: ammonium 4.78%, nitrite 27.2%, nitrate 32.3%, suspended solids 37.5%; R4 and R5 reactors presented the best performance on nitrate removal, with average efficiencies of 47.4% and 42.8%. R3 presented the best SS removal with an average of 58.2%. Conclusions. The RAS water treatment system guaranteed appropriated liquid quality conditions for trout farming; the most efficient reactor for removal of the different forms of nitrogen was the inoculated with the aerated lagoon of AL sludges.
Authors and Affiliations
Iván Sánchez O, M. Sc *| Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia.Correspondence: iaso@udenar.edu.co., Dolly Revelo R, M. Sc| Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia., Álvaro Burbano M, M. Sc| Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia., Roberto García C, I. P. A. | Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia., Camilo Guerrero R, I. P. A. | Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia., Diana Beltrán T, I. P. A| Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia., Luis Benavides M, I. P. A| Universidad of Nariño, Faculty of Fisheries Sciences, Department of Water Resources, Aquaculture Production Engineering Program. Ciudad Universitaria, Barrio Torobajo Carrera 22 # 18-109. San Juan de Pasto, Nariño, Colombia.
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