TY  - JOUR
AU  - Rajaković-Ognjanović, Vladana
AU  - Skala, Dejan
PY  - 2007
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/153
AB  - The publisher regrets the error in the title of this article. The correct title is printed above.
T2  - Separation and Purification Technology
T1  - Separation of oil-in-water emulsions by freeze/thaw method and microwave radiation (vol 49, pg 192, 2006)
EP  - 141
IS  - 1
SP  - 141
VL  - 53
DO  - 10.1016/j.seppur.2006.12.001
ER  - 

@article{
author = "Rajaković-Ognjanović, Vladana and Skala, Dejan",
year = "2007",
abstract = "The publisher regrets the error in the title of this article. The correct title is printed above.",
journal = "Separation and Purification Technology",
title = "Separation of oil-in-water emulsions by freeze/thaw method and microwave radiation (vol 49, pg 192, 2006)",
pages = "141-141",
number = "1",
volume = "53",
doi = "10.1016/j.seppur.2006.12.001"
}

Rajaković-Ognjanović, V.,& Skala, D.. (2007). Separation of oil-in-water emulsions by freeze/thaw method and microwave radiation (vol 49, pg 192, 2006). in Separation and Purification Technology, 53(1), 141-141.
https://doi.org/10.1016/j.seppur.2006.12.001

Rajaković-Ognjanović V, Skala D. Separation of oil-in-water emulsions by freeze/thaw method and microwave radiation (vol 49, pg 192, 2006). in Separation and Purification Technology. 2007;53(1):141-141.
doi:10.1016/j.seppur.2006.12.001 .

Rajaković-Ognjanović, Vladana, Skala, Dejan, "Separation of oil-in-water emulsions by freeze/thaw method and microwave radiation (vol 49, pg 192, 2006)" in Separation and Purification Technology, 53, no. 1 (2007):141-141,
https://doi.org/10.1016/j.seppur.2006.12.001 . .

TY  - JOUR
AU  - Rajaković-Ognjanović, Vladana
AU  - Skala, Dejan
PY  - 2006
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/131
AB  - In this paper, the demulsification has been achieved with the use of freeze/thaw (F/T) method and microwave radiation (MWR). The object of investigation were emulsion samples prepared by mixing the metal-working-oil, FESOL 09, produced by FAM, Krusevac, Serbia, and deionized water. F/T method has been successfully applied for the removal of oil from emulsions in our previous work. In this work, MWR has been additionally used for separation and enhanced heating of emulsion samples. The efficiency of oil removal has been improved with the assistance of MWR, up to 90%.
PB  - Elsevier
T2  - Separation and Purification Technology
T1  - Separation of water-in-oil emulsions by freeze/thaw method and microwave radiation
EP  - 196
IS  - 2
SP  - 192
VL  - 49
DO  - 10.1016/j.seppur.2005.09.012
ER  - 

@article{
author = "Rajaković-Ognjanović, Vladana and Skala, Dejan",
year = "2006",
abstract = "In this paper, the demulsification has been achieved with the use of freeze/thaw (F/T) method and microwave radiation (MWR). The object of investigation were emulsion samples prepared by mixing the metal-working-oil, FESOL 09, produced by FAM, Krusevac, Serbia, and deionized water. F/T method has been successfully applied for the removal of oil from emulsions in our previous work. In this work, MWR has been additionally used for separation and enhanced heating of emulsion samples. The efficiency of oil removal has been improved with the assistance of MWR, up to 90%.",
publisher = "Elsevier",
journal = "Separation and Purification Technology",
title = "Separation of water-in-oil emulsions by freeze/thaw method and microwave radiation",
pages = "196-192",
number = "2",
volume = "49",
doi = "10.1016/j.seppur.2005.09.012"
}

Rajaković-Ognjanović, V.,& Skala, D.. (2006). Separation of water-in-oil emulsions by freeze/thaw method and microwave radiation. in Separation and Purification Technology
Elsevier., 49(2), 192-196.
https://doi.org/10.1016/j.seppur.2005.09.012

Rajaković-Ognjanović V, Skala D. Separation of water-in-oil emulsions by freeze/thaw method and microwave radiation. in Separation and Purification Technology. 2006;49(2):192-196.
doi:10.1016/j.seppur.2005.09.012 .

Rajaković-Ognjanović, Vladana, Skala, Dejan, "Separation of water-in-oil emulsions by freeze/thaw method and microwave radiation" in Separation and Purification Technology, 49, no. 2 (2006):192-196,
https://doi.org/10.1016/j.seppur.2005.09.012 . .

TY  - JOUR
AU  - Rajaković-Ognjanović, Vladana
AU  - Ljubisavljević, Dejan
AU  - Skala, Dejan
PY  - 2005
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/106
AB  - The main sources of oily waste water are oil- refineries, metal industry and food industry. Any technological process that uses emulsions has to take into consideration also the treatment of the used emulsions. The ultimate goal of emulsion treatment is to separate oil from water, and to attain maximum levels of cleanliness of both water and oil. The paper analyzes the possibility of emulsion separation with the use of the freeze/thaw (F/T) method, and the microwave radiation (MWR) assistance method. The F/T method and MWR are relatively new physical methods for de-emulsification, and they have the advantage of belonging to the group of green methods that are reagent-less and ecologically friendly.
AB  - U radu je dat pregled metoda za prečišćavanje otpadnih voda. Predmet istraživanja rada je analiza i primena savremenih metoda za demulzifikaciju, odnosno uklanjanje ulja iz vode. Glavni izvori zauljenih otpadnih voda su rafinerije nafte, proizvodnja / obrada metala i proizvodnja hrane. U skladu sa ekološkim zahtevima svaki tehnološki proces u kome se koriste emulzije ulja u vodi mora da bude praćen odgovarajućom obradom otpadne ili iskorišćene emulzije. Cilj obrade je uklanjanje zagađivača (ulja) i dobijanje vode odgovarajuće čistoće. U ovom radu je istražena mogućnost prečišćavanja emulzija metodom naizmeničnog hlađenja / zagrevanja i metodom hlađenja praćenog mikrotalasnim zagrevanjem. Metode ispitane u ovom radu su nedestruktivne, pripadaju fizičkim metodama analize i primenjuju se bez dodavanja hemijskih reagenasa čime je ostvaren koncept ekološki prihvatljivih ("zelenih") metoda za obradu zauljenih otpadnih voda.
PB  - Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd
T2  - Vodoprivreda
T1  - Physical methods for waste water treatment: The use of freeze/thaw method with the assistance of microwave radiation for oily water treatment
T1  - Fizičke metode za prečišćavanje otpadnih voda - primena metode naizmeničnog mržnjenja i hlađenja i mikrotalasnog zagrevanja za obradu zauljenih voda
EP  - 81
IS  - 1-3
SP  - 71
VL  - 37
UR  - https://hdl.handle.net/21.15107/rcub_grafar_106
ER  - 

@article{
author = "Rajaković-Ognjanović, Vladana and Ljubisavljević, Dejan and Skala, Dejan",
year = "2005",
abstract = "The main sources of oily waste water are oil- refineries, metal industry and food industry. Any technological process that uses emulsions has to take into consideration also the treatment of the used emulsions. The ultimate goal of emulsion treatment is to separate oil from water, and to attain maximum levels of cleanliness of both water and oil. The paper analyzes the possibility of emulsion separation with the use of the freeze/thaw (F/T) method, and the microwave radiation (MWR) assistance method. The F/T method and MWR are relatively new physical methods for de-emulsification, and they have the advantage of belonging to the group of green methods that are reagent-less and ecologically friendly., U radu je dat pregled metoda za prečišćavanje otpadnih voda. Predmet istraživanja rada je analiza i primena savremenih metoda za demulzifikaciju, odnosno uklanjanje ulja iz vode. Glavni izvori zauljenih otpadnih voda su rafinerije nafte, proizvodnja / obrada metala i proizvodnja hrane. U skladu sa ekološkim zahtevima svaki tehnološki proces u kome se koriste emulzije ulja u vodi mora da bude praćen odgovarajućom obradom otpadne ili iskorišćene emulzije. Cilj obrade je uklanjanje zagađivača (ulja) i dobijanje vode odgovarajuće čistoće. U ovom radu je istražena mogućnost prečišćavanja emulzija metodom naizmeničnog hlađenja / zagrevanja i metodom hlađenja praćenog mikrotalasnim zagrevanjem. Metode ispitane u ovom radu su nedestruktivne, pripadaju fizičkim metodama analize i primenjuju se bez dodavanja hemijskih reagenasa čime je ostvaren koncept ekološki prihvatljivih ("zelenih") metoda za obradu zauljenih otpadnih voda.",
publisher = "Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd",
journal = "Vodoprivreda",
title = "Physical methods for waste water treatment: The use of freeze/thaw method with the assistance of microwave radiation for oily water treatment, Fizičke metode za prečišćavanje otpadnih voda - primena metode naizmeničnog mržnjenja i hlađenja i mikrotalasnog zagrevanja za obradu zauljenih voda",
pages = "81-71",
number = "1-3",
volume = "37",
url = "https://hdl.handle.net/21.15107/rcub_grafar_106"
}

Rajaković-Ognjanović, V., Ljubisavljević, D.,& Skala, D.. (2005). Physical methods for waste water treatment: The use of freeze/thaw method with the assistance of microwave radiation for oily water treatment. in Vodoprivreda
Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd., 37(1-3), 71-81.
https://hdl.handle.net/21.15107/rcub_grafar_106

Rajaković-Ognjanović V, Ljubisavljević D, Skala D. Physical methods for waste water treatment: The use of freeze/thaw method with the assistance of microwave radiation for oily water treatment. in Vodoprivreda. 2005;37(1-3):71-81.
https://hdl.handle.net/21.15107/rcub_grafar_106 .

Rajaković-Ognjanović, Vladana, Ljubisavljević, Dejan, Skala, Dejan, "Physical methods for waste water treatment: The use of freeze/thaw method with the assistance of microwave radiation for oily water treatment" in Vodoprivreda, 37, no. 1-3 (2005):71-81,
https://hdl.handle.net/21.15107/rcub_grafar_106 .

TY  - JOUR
AU  - Rajaković-Ognjanović, Vladana
AU  - Skala, Dejan
PY  - 2004
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/73
AB  - An important step in waste water treatment is the removal of oil from an O/W emulsion and the separation of oil and water into two phases, a process usually called demulsification. Modern methods of oil removal from waste water were described in the present study. Typical demulsification techniques include thermal, electrical, chemical, acoustic, or mechanical methods of emulsion treatment. The freeze/thaw process was found to be very effective for demulsification. In the freeze/thaw process, water removal from the W/O emulsion depends on the initial oil content, freezing temperature, freezing time, thawing rate and temperature. The described method is a non-destructive and physical method of emulsion treatment and because there is no addition of chemical agents there is no problem of further waste water treatment, which usually exists when chemicals are applied for demulsification. Different methods for oil content determination in the O/W emulsion were also applied and compared in this study (gravimetric, volumetric, measurement of oxygen consumption and emulsion pH, IR analysis of the emulsion, electro analytical measurement).
AB  - Ideja o razdvajanju ulja i vode u emulzijama i uklanjanju ulja iz vode postupkom hlađenja (mržnjenja) i zagrevanja intenzivno se izučava u poslednjih pet godina. U ovom radu primenjena je metoda destabilizacije emulzija: naizmeničnim zamrzavanjem i otapanjem emulzije, (-Q/+Q). U radu su ispitani i utvrđeni uslovi pri kojima se postupci mržnjenja i ponovnog zagrevanja, te otapanja zamrznute emulzije može uspešno primeniti za demulzifikaciju emulzije koja sadrži od 1 do 30% ulja. Ispitivanja su pokazala da se primenom ove metode može izdvojiti i do 90% ulja iz emulzije. U radu su prikazane i analizirane različite metode određivanja sadržaja ulja u emulziji (gravimetrijska, volumetrijska, optička, IR analiza, elektroanalitička).
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Demulsification based on the thermal treatment (cooling and heating) of W/O emulsions
T1  - Demulzifikacija naizmeničnim hlađenjem i zagrevanjem
EP  - 350
IS  - 7-8
SP  - 343
VL  - 58
DO  - 10.2298/HEMIND0408343R
ER  - 

@article{
author = "Rajaković-Ognjanović, Vladana and Skala, Dejan",
year = "2004",
abstract = "An important step in waste water treatment is the removal of oil from an O/W emulsion and the separation of oil and water into two phases, a process usually called demulsification. Modern methods of oil removal from waste water were described in the present study. Typical demulsification techniques include thermal, electrical, chemical, acoustic, or mechanical methods of emulsion treatment. The freeze/thaw process was found to be very effective for demulsification. In the freeze/thaw process, water removal from the W/O emulsion depends on the initial oil content, freezing temperature, freezing time, thawing rate and temperature. The described method is a non-destructive and physical method of emulsion treatment and because there is no addition of chemical agents there is no problem of further waste water treatment, which usually exists when chemicals are applied for demulsification. Different methods for oil content determination in the O/W emulsion were also applied and compared in this study (gravimetric, volumetric, measurement of oxygen consumption and emulsion pH, IR analysis of the emulsion, electro analytical measurement)., Ideja o razdvajanju ulja i vode u emulzijama i uklanjanju ulja iz vode postupkom hlađenja (mržnjenja) i zagrevanja intenzivno se izučava u poslednjih pet godina. U ovom radu primenjena je metoda destabilizacije emulzija: naizmeničnim zamrzavanjem i otapanjem emulzije, (-Q/+Q). U radu su ispitani i utvrđeni uslovi pri kojima se postupci mržnjenja i ponovnog zagrevanja, te otapanja zamrznute emulzije može uspešno primeniti za demulzifikaciju emulzije koja sadrži od 1 do 30% ulja. Ispitivanja su pokazala da se primenom ove metode može izdvojiti i do 90% ulja iz emulzije. U radu su prikazane i analizirane različite metode određivanja sadržaja ulja u emulziji (gravimetrijska, volumetrijska, optička, IR analiza, elektroanalitička).",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Demulsification based on the thermal treatment (cooling and heating) of W/O emulsions, Demulzifikacija naizmeničnim hlađenjem i zagrevanjem",
pages = "350-343",
number = "7-8",
volume = "58",
doi = "10.2298/HEMIND0408343R"
}

Rajaković-Ognjanović, V.,& Skala, D.. (2004). Demulsification based on the thermal treatment (cooling and heating) of W/O emulsions. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 58(7-8), 343-350.
https://doi.org/10.2298/HEMIND0408343R

Rajaković-Ognjanović V, Skala D. Demulsification based on the thermal treatment (cooling and heating) of W/O emulsions. in Hemijska industrija. 2004;58(7-8):343-350.
doi:10.2298/HEMIND0408343R .

Rajaković-Ognjanović, Vladana, Skala, Dejan, "Demulsification based on the thermal treatment (cooling and heating) of W/O emulsions" in Hemijska industrija, 58, no. 7-8 (2004):343-350,
https://doi.org/10.2298/HEMIND0408343R . .