The Effects of Biological Flocculation from Recirculating Aquaculture System on Controlling the Inorganic Nitrogen Concentrations
Abstract
This research involved the study of the role biological flocculation formed in the Recirculating aquaculture system in treating of ammonium and nitrite. Tilapia cultivation was conducted for 60 days without water exchange and solids removal given the initial tilapia weight density of 3.0 kg/m3. Maintenance of suspended solids concentrations between 200 and 800 mg SS/L, which was equivalent to nitrogen waste loadings ranged from 2.9 to 9.6 mg N/mg-day, was capable of maintaining ammonium and nitrite concentrations below 1.0 mg N/L. In addition, ammonium removal rates of bioflocs from cultivating tanks varied time with the rate on Day 30 determined at 0.023 ± 0.001 mg N/mg-day, a higher value than the rates observed before Day 30 and after Day 45. Thus the bioflocs had a potential for nitrogen treatment application in aquaculture system. Keywords : biological flocculation, nitrogen compound removal, recirculating aquaculture system, tilapia, nitrificationReferences
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Thanakitpairin, A., Phinitthanaphak, P., Powtongsook, S., & Pungrasmi, W. (2015). Nitrogen Compound Removal with Combined Nitrification–Denitrification Reactor. Burapha Science Journal, 20(2), 164-173. (in Thai)
Timmons, M.B., Ebeling, J.M., Wheaton, F.W., Summerfelt, S.T., & Vincii, B.J.(2002) Recirculating Aquaculture System. 2ndedition. New York: Northeastern Regional Aquaculture Center.
Vadivelu, V.M., Keller, J., & Yuan, Z. (2007). Effect of free ammonia on the respiration and growth processes of an enriched Nitrobacter culture. Water Research, 41(4), 826–834.
Avnimelech, Y. (2006). Bio-filters : The need for an new comprehensive approach. Aquacultural Engineering, 34, 172–178.
Azim, M.E., Little, D.C., & Bron, J.E. (2008). Microbial protein production in activated suspension tanks manipulating C:N ratio in feed and the implications for fish culture. Bioresource Technology, 99, 3590–3599.
Crab, R., Avnimelech, Y., Defoirdt, T., Bossier, P., & Verstraete, W. (2007). Nitrogen removal techniques in aquaculture for a sustainable production. Aquaculture, 270, 1-14.
Ebeling, J.M., Timmons, M.B., & Bisogni, J.J. (2007). Engineering analysis of the stoichiometry of photoautotrophic, autotrophic, and heterotrophic removal of ammonia–nitrogen in aquaculture systems. Aquaculture, 257, 346–358.
Gaona, C.A.P., Poersch, L.H., Krummenauer, D., Foes, G.K., & Wasielesky, W.J. (2011). The effect of solids removalon water quality, growth and survival of Litopenaeus vannamei in a Biofloc Technology Culture System. International Journal of Recirculating Aquaculture, 12, 54-73.
Nootong, K., Pavasant, P., & Powtongsook, S. (2011). Effects of organic carbon addition in controlling inorganic nitrogen concentrations in a biofloc system. Journal of The World Aquaculture Society, 42(3), 339 - 346.
Sesuk, T., Powtongsook, S., & Nootong, K. (2009). Inorganic nitrogen control in a novel zero - water exchanged aquaculture system integrated with airlift - submerged fibrous nitrifying biofilters. Bioresource Technoloy, 100, 2088 - 2094.
Thanakitpairin, A., Powtongsook, S., & Pungrasmi, W. (2014). The Role of Suspended Solids on Water Quality in Closed Recirculating Tilapia Culture System. Rajabhat Rambhai Barni Research Journal, 8(2), 93-100. (in Thai)
Thanakitpairin, A., Phinitthanaphak, P., Powtongsook, S., & Pungrasmi, W. (2015). Nitrogen Compound Removal with Combined Nitrification–Denitrification Reactor. Burapha Science Journal, 20(2), 164-173. (in Thai)
Timmons, M.B., Ebeling, J.M., Wheaton, F.W., Summerfelt, S.T., & Vincii, B.J.(2002) Recirculating Aquaculture System. 2ndedition. New York: Northeastern Regional Aquaculture Center.
Vadivelu, V.M., Keller, J., & Yuan, Z. (2007). Effect of free ammonia on the respiration and growth processes of an enriched Nitrobacter culture. Water Research, 41(4), 826–834.
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2016-09-19
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