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2003 | 29 | 1-2 | 23 - 42
Tytuł artykułu

Evaluation of chemical coagulation-flocculation aids for the removal of suspended solids and phosphorus from intensive recirculating aquaculture effluent discharge

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
An evaluation of two commonly used coagulation-flocculation aids (alum and ferric chloride) was conducted for the supernatant overflow from settling cones used to treat the effluent from microscreen filters in an intensive recirculating aquaculture system. In addition to determining the effectiveness of these aids in removing both suspended solids and phosphorus, a systematic testing of the variables normally encountered in the coagulation-flocculation process was performed. Tests were carried out to evaluate the dosages and conditions (mixing and flocculation stirring speeds, durations, and settling times) required to achieve optimum waste capture. The orthophosphate removal efficiency for alum and ferric chloride were 89 and 93%, respectively, at a dosage of 90 mg/l. Optimum turbidity removal was achieved with a 60 mg/l dosage for both alum and ferric chloride. Both alum and ferric chloride demonstrated excellent removal of suspended solids from initial TSS values of approximately 100-10 mg/l at a dosage of 90 mg/l. Flocculation and mixing speed played only a minor role in the removal efficiencies for both orthophosphates and suspended solids. Both coagulation-flocculation aids also exhibited excellent settling characteristics, with the majority of the floc quickly settling out in the first 5 min.
Rocznik
Tom
29
Numer
1-2
Strony
23 - 42
Opis fizyczny
Twórcy
  • The Conservation Fund Freshwater Institute, P.O. Box 1889, Shepherdstown, WV 25443, USA
  • US Geological Survey, Leetown Science Center, Kearneysville, WV 25430, USA
  • The Conservation Fund Freshwater Institute, P.O. Box 1889, Shepherdstown, WV 25443, USA
  • The Conservation Fund Freshwater Institute, P.O. Box 1889, Shepherdstown, WV 25443, USA
Bibliografia
  • Adler and Sibrell, 2003, Adler P.R., Sibrell P.L., Sequestration of Phosphorus by Acid Mine Drainage Floc, Journal of Environmental Quality 32, 2003, 1122 - 1129
  • Adler et al., 1996, Adler P.R., Summerfelt S.T., Glenn M.D., Takeda F., Evaluation of a model wetland system designed and operated to meet stringent phosphorus discharge requirements, Water Environment Research 68, 5, 1996, 836 - 840
  • Adler et al., 2000, Adler P.R., Harper J.K., Takeda F., Wade E.M., Summerfelt S.T., Economic evaluation of hydroponics and other treatment options for phosphorus removal in aquaculture effluent, Horticultural Science 35, 6, 2000, 993 - 999
  • APHA, 1989, APHA, 1989. Standard Methods for the Examination of Water and Wastewater. 17th ed. American Public Health Association, American Water Works Association, Water Pollution and Control Federation, Washington, DC.
  • ASTM, 1995, ASTM, 1995. Standard Practice for Coagulation–Flocculation Jar Test of Water E1-1994 R(1995), D 2035-80. Annual Book of ASTM Standards, Vol. 11.02.
  • AWWA, 1997, AWWA, 1997. Water treatment plant design. American Water Works Association, American Society of Civil Engineers, Third Edition, McGraw-Hill, New York.
  • Barak and van Rijn, 2000, Barak Y., van Rijn J., Biological phosphate removal in a prototype recirculating aquaculture treatment systemm, Aquaculture Engineering 22, 2000, 121 - 136
  • Bergheim et al., 1993, Bergheim A., Kristiansen R., Kelly L., Treatment and utilization of sludge from landbased farms for salmon, Wang J.-K., Techniques for Modern Aquaculture, 1993, ASAE, St. Joseph, MI
  • Ebeling and Summerfelt, 2002, Ebeling, J.M., Summerfelt, S.T., 2002. Performance evaluation of a full-scale intensive recirculating aquaculture system's waste discharge treatment system. In: Rakestraw, T.T, Douglas, L.S., Flick, G.J. (Eds), The Fourth International Conference on Recirculating Aquaculture, Virginia Polytechnic Institute and State University, Blacksburg, VA, pp. 506–515.
  • Heinen et al., 1996, Heinen J.M., Hankins J.A., Adler P.R., Water quality and waste production in a recirculating trout culture system with feeding of a higher-energy or lower-energy diet, Aquaculture Research 27, 1996, 699 - 710
  • Kioussis et al., 1999, Kioussis D.R., Wheaton F.W., Kofinas P., Phosphate binding polymeric hydrogels for aquaculture wastewater remediation, Aquaculture Engineering 19, 1999, 163 - 178
  • Metcalf and Eddy, 1991, Metcalf and Eddy, Inc., 1991. Wastewater Engineering: Treatment, Disposal and Reuse, third ed., McGraw-Hill, Boston, MA.
  • Summerfelt, 1998, Summerfelt, S.T., 1998. An integrated approach to aquaculture waste management in flowing water tank culture systems. In: Libey, G.S., Timmons, M.B. (Eds.), The Second International Conference on Recirculating Aquaculture, Virginia Polytechnic Institute and State University, July 16–19, Roanoke, VA, pp. 87–97.
  • Summerfelt et al., 1999, Summerfelt S.T., Adler P.R., Glenn D.M., Kretschmann R.N., Aquaculture sludge removal and stabilization within created wetlands, Aquacultural Engineering 19, 2, 1999, 81 - 92
  • Summerfelt et al., 2000, Summerfelt, S.T., Davidson, J., Timmons, M.B., 2000. Hydrodynamics in the ‘Cornell-type’ dual-drain tank. In: The Third International Conference on Recirculating Aquaculture, Virginia Polytechnic Institute and State University, July 22–23, Roanoke, VA, pp. 160–166.
  • Summerfelt et al., in press, Summerfelt, S.T., Wilton, G., Roberts, D., Savage, T., Fonkalsrud. K., 2002. Developments in recirculating systems for arctic char culture in North America. Aquacultural Engineering, in press.
  • Timmons and Summerfelt, 1997, Timmons, M.B., Summerfelt, S.T., 1997. Advances in circular culture tank engineering to enhance hydraulics, solids removal and fish management. In: Timmons, M.B., Losordo, T. (Eds.), Recent Advances in Aquacultural Engineering, November 9–12, Orlando, FL, Northeast Regional Agricultural Engineering Service, Ithaca, NY, pp. 66–84.
  • Tsukuda et al., 2000, Tsukuda, S., Wallace, R., Summerfelt, S.T., Hankins, J., 2000. Development of a Third Generation acoustic waste feed monitor. In: The Third International Conference on Recirculating Aquaculture, Virginia Polytechnic Institute and State University, July 22–23, Roanoke, VA, pp. 105–108.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.elsevier-e8baaa0f-7ff5-360e-bd5b-a914c1c99240
Identyfikatory
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