Znaczenie hydrodynamiki komór reakcji w procesie ozonowania wody

• Autorzy: Olsińska U. , Kuś K.

Warianty tytułu

EN

Role of hydrodynamic behaviour of contact columns in the ozonation process

• Języki publikacji: PL

Abstrakty

EN

The efficiency of the ozonation process is affected by the following major factors: gas-liquid dispersion (interfacial gas-liquid surface) and contact time, as well as some other parameters influencing the mass transfer rate and the kinetics of chemical and biochemical reactions. And this is why the intensity of mixing in the dissolution system becomes a key issue. Mixing intensity depends on the following operating parameters: volumetric liquid flow rate, volumetric gas flow rate and reactor geometry. The primary objective of the study reported in the present paper was to analyze the problem of how the said parameters influence the hydraulic behavior of the contact column. Tracer studies were carried out with a contact column in a co- and counter-current gas-to-water-flow system. It was found that the presence of the gas phase changed the behavior of the reaction column - basically due to the increase of mixing intensity. When the intensity of mixing increases and the quality of the oxidant dose cannot be changed, there will be a concomitant increase in the yield of the oxidation/disinfection reactions, which produce undesirable intermediates. This increase is paralleled by the shortening of both mean residence time and t10, which deteriorates the efficiency of disinfection. The results of the study evidence that the selection of the plug flow reactor is a prerequisite of an effective ozone use for microorganism inactivation.

Słowa kluczowe

PL

dezynfekcja wody; ozonowanie wody; hydrodynamika; badania hydrauliczne; komory kontaktowe

• Wydawca: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych, Oddział Dolnośląski
• Czasopismo: Ochrona Środowiska
• Rocznik: 2001
• Tom: nr 2
• Strony: 15--20
• Opis fizyczny: Bibliogr. 12 poz., tab., wykr.

Twórcy

autor

Olsińska U.

• Instytut Inżynierii Wody i Ścieków, Politechnika Śląska, ul. S. Konarskiego 18, 44-101 Gliwice

autor

Kuś K.

• Instytut Inżynierii Wody i Ścieków, Politechnika Śląska, ul. S. Konarskiego 18, 44-101 Gliwice

Bibliografia

• 1. Cooperative research: Ozone in Water Treatment. Application and Engineering. Lewis Publishers, Chelsea 1991.
• 2. A. BIN: Nowe tendencje w zakresie urządzeń do wprowadzania ozonu do fazy ciekłej. Informacja INSTAL, 2000, nr 5, ss. 3-8.
• 3. O. LEVENSPIEL: Chemical Reaction Engineering. J. Wiley & Sons, New York 1999.
• 4. J. CIBOROWSKI: Inżynieria Procesowa. Wydawnictwo Naukowo-Techniczne, Warszawa 1973.
• 5. J. SZARAWARA, J. SKRZYPEK, A. GAWDZIK: Podstawy inżynierii reaktorów chemicznych. Wydawnictwo Naukowo-Techniczne, Warszawa 1991.
• 6. T. R. CAMP, P. C. STEIN: Velocity gradients and internal work in fluid motion. J. Boston Soc. Civ. Eng., 1943, Vol. 30, pp. 209.
• 7. E. ILLER: Badanie znacznikowe w inżynierii procesowej. Wydawnictwo Naukowo-Techniczne, Warszawa 1992.
• 8. J. T. GRAMITH: Demonstration scalę evaluation of bromate formation and control strategies. Proc. Ann. Conf. AWWA, San Antonio 1993, pp. 98-104.
• 9. J. MALLEVIALLE: Influence and Removal of Organics in Drinking Water. Levis Publishers, Boca Raton 1992.
• 10. J. AEPPLI: Review of protozoa elimination with ozone. Proc. 13th Ozone World Congress, IOA, Kyoto 1997, pp. 731-735.
• 11. J. C. JORET, J. BARON, B. LANGLAIS, D. PERRINE: Inactivation of Cryptosporidium sp. oocysts by ozone evaluated by animal infectivity. Proc. 13th Ozone World Congress, IOA, Kyoto 1997, pp. 739-743.
• 12. N. MOTOYAMA, K. OZAWA, D. CHIKUMA: Inactivation of Cryptosporidium parvum oocysts by ozone. Proc. 14th, Ozone World Congress, IOA, Dearbom 1999, pp. 1-12.