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2015, vol. 13, br. 4, str. 225-234
Diagnostic of water vapor adsorption molar heat and accumulation at bubble surface during aeration treatment in saturation period
(naslov ne postoji na srpskom)
aTechnical School, Zrenjanin
bUniverzitet u Sarajevu, Mašinski fakultet, Federacija BiH
cUniverzitet u Beogradu, Mašinski fakultet
dUniverzitet u Novom Sadu, Tehnički fakultet 'Mihajlo Pupin', Zrenjanin

Ključne reči: Water vapor; Vaporization; Saturation; Oxygen; Molarity; Heating; Bubbles; Air; Adsorption; Accumulation
(ne postoji na srpskom)
Diagnostics of adsorbed water vapor molar heat and accumulation at bubble surface during refinery waste water aeration treatment with membrane distributor was performed, on the basis of experimentally measured air temperature and pressure on input and exit and measured stationary oxygen content after saturation period. The working hypothesis is that electromotor and compressor favor the consumption of water vapor adsorption heat at bubbles surfaces and the relaxation with active centers transport work, according to II law of thermodynamic. During air overpressure relaxation, active centers enable the couple of prevented exothermic hydration and favored endothermic processes and water vapor accumulation up to catalyst final titration points in zone of condensation, precipitatation, vaporization, nitrification/denitrification and biological slime that can cause diffuser fouling and scalling. Diagnostics results for the all 15 examined systems with the same membrane diffuser and various combination of process parameters, c-h-q: without and with added motor oil, c = 0 mg/l 5 mg/l and 10 mg/l, with two heights of water column, h =1m and 2 m and with three air flows, q=2m3/h, 6m3/h and 10 m3/h verified the linear functional dependence of indicator of proper process condition, i.e. experimental determined oxygen saturation degree on water vapor accumulation (R2=0.766).
Armellini, F.J., Tester, J.W., Hong, G.T. (1994) Precipitation of sodium chloride and sodium sulfate in water from sub- to supercritical conditions: 150 to 550 °C, 100 to 300 bar. Journal of Supercritical Fluids, 7(3): 147-158
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Egan-Benck, K.O., Mc, C., Winkler, W. (1993) Choosing diffusers. Water Environment and Technology, Vol. 5, Nb. 2, pp. 54-59
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Josephson, J. (1982) Supercritical fluids. Environmental Science & Technology, 16(10): 548A-551A
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Simić, S. (2006) Influenceof aeration regimes on processes efficiency in biology treatment of refinery waste water. Mechanical engineering faculty, University in Belgrade, Doktoral thesis
Simić, S.N., Ševaljević, M.M., Stanojević, M.M., Ševaljević, P.V. (2013) Thermodynamic diagnostics of the depolarization overpotential and electron temperatures of contact surfaces in aerated refinery wastewater. Desalination and Water Treatment, 52(37-39): 7065-7081
Stanojević, M., Ševaljević, M.M., Simić, S., Ševaljević, M.V. (2013) Influence of the water height in aeration regimes with the same membrane diffuser on technical characteristics of aeration system. Desalination and Water Treatment, 51(22-24): 4271-4282
Ševaljević, M.M., Simić, S.N., Ševaljević, P.V. (2012) Thermodynamic diagnostic of electrons densities in gas bubbles in aerated saturated refinery wastewater. Desalination and Water Treatment, 42(1-3): 144-154
Ševaljević, M.M., Stanojević, M.M., Simić, S.N., Ševaljević, M.V. (2013) Water entropy-driven electrochemical relaxation of dissolved oxygen in aerated refinery wastewater. Desalination and Water Treatment, 52(16-18): 3035-3046
Ševaljević, M.M., Stanojević, M., Simić, S., Pavlović, M. (2009) Thermodynamic study of the aeration kinetic in treatment of refinery waste water in bio-aeration tanks. Desalination, 248(1-3): 941-960
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Weidenbach, G., Furst, H. (1963) Chem. Techn, Vol. 15, pp. 589

O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/jaes13-8696
objavljen u SCIndeksu: 03.02.2016.
metod recenzije: dvostruko anoniman
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