• Title/Summary/Keyword: Floating bead filter

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Removal of Suspended Solids and Nitrification by Floating Bead Filter in Recirculating Aquaculture System (Floating Bead Filter에 의한 순환여과식 양식장의 부유고형물 제거와 질산화)

  • KIM Byong Jin;KIM Sung Koo;SUH Kuen Hack
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.2
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    • pp.163-169
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    • 2003
  • The floating bead filter was tested for treatment of aquacultural water in a pilot-scale recirculating aquaculture system. Performance of floating bead filter on the removal of total suspended solids (TSS) and the treatment of nitrogen sourer such as total ammonia nitrogen (TAN), nitrite nitrogen and nitrate nitrogen were evaluated. The system was stocked with Nile tilapia at an initial rearing densities of $5\%\;and\;7\%$ over 30 days. The average TSS removal rates were $43.0\;g/m^2{\cdot}day\;and\;39.5\;g/m^2{\cdot}day$ for rearing density of $5\%\;and\;7\%$, respectively. As rearing density increased from $5\%\;to\;7\%$. the TAN removal efficiency decreased from $22.0\%\;to\;17.7\%$. At the rearing densities of $5\%\;and\;7\%$, the average TAN removal rates and removal efficiencies were $38.8\;g/m^2{\cdot}day,\;15.6\%\;and\;37.8\;g/m^2{\cdot}day.\;17.7\%,$ respectively. The average TAN removal rate was $37.8-38.8\;g/m^3{\cdot}day.$ The oxygen consumption by floating bead filter was higher than theoretical oxygen consumption rate by nitrification.

Design and Development of Integrated Recirculating Aquaculture System (순환 여과식 양식 시스템의 설계 및 개발)

  • SUH Kuen-Hack;KIM Byong-Jin;JEON Im Gi
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.34 no.1
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    • pp.70-76
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    • 2001
  • An integrated recirculating aquaculture system suitable to our country's situation was designes and developed, The integrated recirculating aquaculture system consisting of a double drain type rearing tank of the $2.5 m^3$, a sedimentation tank for removal of settleable solids, a floating bead filter for the removal of suspended solids, a foam separator for removal of fine particles and a rotating biological contactor for the nitrification was designed and manufactured. The integrated recirculating aquaculture system was stocked with nile tilapia (Oreochromis niloticus) at $2\%$ rearing density for 2 weeks. Feed coefficient was 1.4 and average daily growth rate was $0.64\%$ in the system for 2 weeks.

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Start-up Operation of Recirculating Aquaculture System (순환여과식 양식 시스템의 개시 운전)

  • Seo Kuen Hack;Kim Byong Jin;Jo Jae Yoon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.35 no.1
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    • pp.21-26
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    • 2002
  • The behavior of the biological water treatment process on start-up operation was evaluated in the integrated recirculating aquaculture system consisting of a double drain type rearing tank ($2.5 m^3$), a sedimentation tank, a floating bead filter, a foam separator and a rotating biological contactor. A system was stocked with nile tilapia (Oreochromis niloticus) at an initial rearing density of $2\%$ for 2 weeks for acclimated rotating biological contactor. The total ammonia nitrogen (TAN) level increased to $13.6 g/m^3$ on day 4 after adding feed and was decreased to $0.3 g/m^3$ on day 7. The total suspended solid was completely removed during overall experimental period.

Culture of Nile Tilapia (Oreochromis niloticus) in Recirculating Aquaculture System (순환여과식 양식 시스템에서 나일 틸라피아(Oreochromis niloticus)의 사육)

  • Seo Kuen Hack;Kim Byong Jin;Jo Jae Yoon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.35 no.1
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    • pp.27-34
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    • 2002
  • The performances of fish culture were evaluated in the integrated recirculating aquaculture system consisting of a double drain type rearing tank ($2.5 m^3$), a sedimentation tank, a floating bead filter, a foam separator and a rotating biological contactor. A system was stocked with nile tilapia at an initial rearing densities of $5\%$ (A), $5\%$ (B) and $7\%$ (C) oyer 30 days. Feed coefficient was 1.62, 1,79 and 1.80 and average daily growth rate was $0.452\%$, 0.u5% and $0.423\%$, respectively. The level of TAN was maintained below $1 g/m^3$ for $5\%$ of initial rearing density and $2-4 g/m^3$ for $7\%$. The dissolved oxygen level ($2-4 g/m^3$) was not optimum but should not be inhibitory to fish growth. The total suspended solid was completely removed during overall experimental period.