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Volume 6 Issue 3
Sep.  2015
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Article Navigation >  Journal of Tropical Biology  > 2015  >  6(3): 235-241

CUI Yunliang, GU Zhifeng, ZHENG Xing, WANG Aimin. Comparison of Five Biofilter Media in Ammonia-removing Efficiency in the Recirculation Aquaculture System[J]. Journal of Tropical Biology, 2015, 6(3): 235-241. doi: 10.15886/j.cnki.rdswxb.2015.03.002
Citation: CUI Yunliang, GU Zhifeng, ZHENG Xing, WANG Aimin. Comparison of Five Biofilter Media in Ammonia-removing Efficiency in the Recirculation Aquaculture System[J]. Journal of Tropical Biology, 2015, 6(3): 235-241. doi: 10.15886/j.cnki.rdswxb.2015.03.002
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Comparison of Five Biofilter Media in Ammonia-removing Efficiency in the Recirculation Aquaculture System

doi: 10.15886/j.cnki.rdswxb.2015.03.002

  • 1. Ministry of Education Key Laboratory of Tropical Bio-resources, Hainan University, Haikou 570228;

  • 2. Ocean College/Hainan Key Laboratory of Tropical Hydrobiological Technology, Hainan University, Haikou 570228, China

  • Received Date: 2015-01-22
  • Five biofilter media,bacterial ball,white glass ring,volcanic rock,red breathing loop and coral sandstone,were used to remove dissolved NH4+-N,NO2-N and NO3--N in the seawater in a closed recirculation aquaculture system by using the natural biofilm cultivation method,and to examine the change of and the relation among NH4+-N,NO2-N and NO3--N in the seawater after the biofilm maturation. During biofilm cultivation,these biofilter media were found to reduce the NH4+-N concentrations over time,increase initially and then decrease the NO2-N concentrations,and increase gradually the NO3--N concentrations. The coral sandstone and the red breathing loop were better than other media in removing inorganic nitrogen. They formed biofilms in about 23 days and reduced the ammonia concentrations to 0. 215 mg·L-1 at day 15 after biofilm formation,with a NH4+-N removal rate of upto 98. 5%. After biofilm maturation,the exponential equation y = ae-bx was fitted to the data of the NH4+-N removal efficiencies of each biofilter medium,and the equation y = 1/（a+b/xlnx +c/x） fitted to the data of the NO2-N and NO3--N removal efficiencies. Moreover,the relationship between the NH4+-N concentration and the NO2-N concentration or the NO3--N concentration in the sea water was also fitted by using the exponential equation y = ae-bx.
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Comparison of Five Biofilter Media in Ammonia-removing Efficiency in the Recirculation Aquaculture System

doi: 10.15886/j.cnki.rdswxb.2015.03.002
  • 1. Ministry of Education Key Laboratory of Tropical Bio-resources, Hainan University, Haikou 570228;
  • 2. Ocean College/Hainan Key Laboratory of Tropical Hydrobiological Technology, Hainan University, Haikou 570228, China
  • Received Date: 2015-01-22

Abstract: Five biofilter media,bacterial ball,white glass ring,volcanic rock,red breathing loop and coral sandstone,were used to remove dissolved NH4+-N,NO2-N and NO3--N in the seawater in a closed recirculation aquaculture system by using the natural biofilm cultivation method,and to examine the change of and the relation among NH4+-N,NO2-N and NO3--N in the seawater after the biofilm maturation. During biofilm cultivation,these biofilter media were found to reduce the NH4+-N concentrations over time,increase initially and then decrease the NO2-N concentrations,and increase gradually the NO3--N concentrations. The coral sandstone and the red breathing loop were better than other media in removing inorganic nitrogen. They formed biofilms in about 23 days and reduced the ammonia concentrations to 0. 215 mg·L-1 at day 15 after biofilm formation,with a NH4+-N removal rate of upto 98. 5%. After biofilm maturation,the exponential equation y = ae-bx was fitted to the data of the NH4+-N removal efficiencies of each biofilter medium,and the equation y = 1/（a+b/xlnx +c/x） fitted to the data of the NO2-N and NO3--N removal efficiencies. Moreover,the relationship between the NH4+-N concentration and the NO2-N concentration or the NO3--N concentration in the sea water was also fitted by using the exponential equation y = ae-bx.

CUI Yunliang, GU Zhifeng, ZHENG Xing, WANG Aimin. Comparison of Five Biofilter Media in Ammonia-removing Efficiency in the Recirculation Aquaculture System[J]. Journal of Tropical Biology, 2015, 6(3): 235-241. doi: 10.15886/j.cnki.rdswxb.2015.03.002
Citation: CUI Yunliang, GU Zhifeng, ZHENG Xing, WANG Aimin. Comparison of Five Biofilter Media in Ammonia-removing Efficiency in the Recirculation Aquaculture System[J]. Journal of Tropical Biology, 2015, 6(3): 235-241. doi: 10.15886/j.cnki.rdswxb.2015.03.002
shu

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