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Measurement of air-water oxygen transfer of cylindrical vortex flow regulators at a recirculating system

Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Hydrodynamic flow regulators are used for diversion and/or limiting excess discharge in wastewater and stormwater systems as a replacement for traditional flow throttling devices. They are highly efficient, reliable and free from common disadvantages of traditional devices. Recent research of the authors indicated that atomization of a liquid by vortex flow regulators accelerates oxygenation and prevents the putrefaction process in wastewater and storm water collection systems. The study presents experimental results of the oxygen transfer measurements for basic designs of cylindrical hydrodynamic flow regulators in a closed-circuit experimental setup at the semi-commercial scale. The oxygen mass transfer coefficient, standard oxygen transfer rate and standard aeration efficiency were determined for the range of tested configurations by the clean water test.
Rocznik
Strony
207--215
Opis fizyczny
Bibliogr. 23 poz., rys.
Twórcy
  • Faculty of Environmental Engineering, Wroclaw University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
autor
  • Faculty of Environmental Engineering, Wroclaw University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
autor
  • Faculty of Environmental Engineering, Wroclaw University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
Bibliografia
  • [1] HAGER W.H., Wastewater hydraulics, 2nd Ed., Springer, Berlin, 2010.
  • [2] WOJTOWICZ P., KOTOWSKI A., Influence of design parameters on throttling efficiency of cylindrical and conical vortex valves, J. Hydr. Res., 2009, 47 (5), 559.
  • [3] KOTOWSKI A., WOJTOWICZ P., Analysis of hydraulic parameters of conical vortex regulators, Polish J. Environ. St., 2010, 19 (4), 749.
  • [4] WOJTOWICZ P., KOTOWSKI A., SZLACHTA M., Flow modeling and aeration efficiency of modern hydrodynamic regulators. Results of aeration efficiency measurements - stage IV, Inst. Environ. Prot. Eng. Reports, 2012, No. 15 (in Polish).
  • [5] KAŹMIERCZAK B., Mathematical modelling of storm overflow with a cylindrical vortex regulator, Ann. Set. Environ. Prot., 2013, 15, 2158 (in Polish).
  • [6] ALP E., MELCHING C.S., Allocation of supplementary aeration stations in the Chicago waterway system for dissolved oxygen improvement, J. Environ. Manage., 2011, 92 (6), 1577.
  • [7] HOBUS I., HEGEMANN W., Renewable energy for the aeration of wastewater ponds, Water Sci. Tech- nol., 2003, 48 (2), 365.
  • [8] BĄK L., GÓRSKI J., GÓRSKA K., SZELĄG B., Suspended solids and heavy metals content of selected rainwater waves in an urban catchment area: A case study, Ochr. Środ., 2012, 34 (2), 49.
  • [9] PAWEŁEK J., GRENDA W., Effect of the storage reservoirs at the Rudawa River intake on the ąuality of the municipal water for Krakow, Ochr. Środ., 2011, 33 (4), 63.
  • [10] BAAWAIN M.S., EL-DIN M.G., SMITH D.W., Characterizing two inclined circular water jetsplunging into an aeration tank, Int. J. Multiph. Flow, 2012, 40, 158.
  • [11] KHALIFA A., BAYOUMI S., EL MONAYERI O., Mathematical modeling of aeration efficiency and dis- solved oxygen provided by stepped cascade aeration, Water Sci. Technol., 2011, 63 (1), 1.
  • [12] MOULICK S., TAMBADA N.V., SINGH B.K., MAL B.C., Aeration characteristics of a rectangular stepped cascade system, Water Sci. Technol., 2010, 61 (2), 415.
  • [13] WOJTOWICZ P., SZLACHTA M., Aeration performance of hydrodynamic flow regulators, Water Sci. Technol., in press, 2013.
  • [14] BAYVEL L., ORZECHOWSKI Z., Liąuid Atomization, Taylor and Francis, Washington, 1993.
  • [15] LEFEBVRE A., Atomization andSprays, Taylor and Francis, New York, 1989.
  • [16] STENSTROM M., Measurement of Oxygen Transfer in Clean Water, ASCE/EWRI, Reston, VA, 2007.
  • [17] DWA, Measurement of the Oxygen Transfer in Activated Sludge Aeration Tanks with Clean Water and in Mixed Liąuor, German Association for the Water Environment, 1996.
  • [18] EN 12255:15, Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants, European Committee for Standardization, 2003.
  • [19] GULLIVER J.S., RINDELS A.J., Measurement of air-water oxygen transfer at hydraulic structures, J. Hydraul. Eng. ASCE, 1993, 119 (3), 327.
  • [20] JIANG P., STENSTROM M.K., Oxygen transfer parameter estimation: impact of methodology, J. Environ. Eng. ASCE, 2012, 138 (2), 137.
  • [21] LEWIS W.K., WHITMAN W.G., Principles of gas absorption, Ind. Eng. Chem., 16 (12), 1924, 1215.
  • [22] DANCKWERTS P.V., Significance of liąuid film coefficients in gas absorption, Ind. Eng. Chem., 1951, 43 (6), 1460.
  • [23] SCHIERHOLZ E.L., GULLIVER J.S., WILHELMS S.C., HENNEMAN H.E., Gas transfer from air diffusers, Water Res., 40 (5), 2006, 1018.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-c7a5d158-d22b-4c88-92bf-761a6538a4d3
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