DOI: 10.5937/jaes13-8696
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions.
Volume 13 article 333 pages: 225-234
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 over-pressure 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).
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