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Your search keyword '"Rudonja, Nedžad"' showing total 4 results
Start Over Author "Rudonja, Nedžad" Topic drying
4 results on '"Rudonja, Nedžad"'

1. STUDY OF VACUUM AND FREEZE DRYING OF BEE HONEY.

Author

NEDIĆ, Nebojša M., GOJAK, Milan D., ZLATANOVIĆ, Ivan J., RUDONJA, Nedžad R., LAZAREVIĆ, Kristina B., DRAŽIĆ, Milan S., GLIGOREVIĆ, Kosta B., and PAJIĆ, Miloš B.

Subjects
HONEYBEES, FREEZE-drying, DRYING, HIGH performance liquid chromatography, COMMON sunflower, VACUUM, HONEY
Abstract

The aim of this research is to study the drying kinetics of vacuum-dried and freeze-dried bee honey produced from two different varieties: Sunflower honey (Helianthus Annuus L.) and Acacia honey (Robinia pseudo acacia L.). Vacuum drying treatments were carried out with the honey samples' initial temperatures of +25 °C, -20 °C, and -40 °C. Water content, total soluble solids, as well as the water activity of fresh and dried honey samples were determined. Freeze-drying of bee honey with initial sample temperature of -40°C has resulted in shorter drying time (7-9 hours), moisture content (10%-12%), water activity (0.405-0.427 aW) and effective moisture diffusivity coefficient (8.26·10-7-9.51·10-7 m²/s). The high-performance liquid chromatography method was used when analyzing the impact that drying pre-treatments had on honey quality. The application of pre-treatments has led to an increase in hydroxy-methyl-furfural by 39-71%, and a decrease in diastase activity by 17-36%, all compared to fresh honey samples. The solutions of Verma model proved to be the best fit with the experimental results. [ABSTRACT FROM AUTHOR]

Published
2020
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2. Primena toplotnih pumpi u sistemima za sušenje prehrambenih proizvoda

Author

Zlatanović, Ivan, Rudonja, Nedžad, and Gligorević, Kosta

Subjects
heat pump, koeficijent grejanja, energetska efikasnost, toplotna pumpa, sušenje, drying, coefficient of performance, energy efficiency
Abstract

Heat pump drying systems application has great potential and provides economical and ecological benefit in food industry. Many researchers deal with a problem of investigating heat pump drying system performance. However, there have not been any massive applications of these systems on farms and in food industry in Republic of Serbia, considering huge effort of their promotion. This paper analyze performances of typical drying systems configurations from the COP and specific compressor work point of view, considering different outside influences and operating conditions. . Upotreba toplotnih pumpi obećava ekonomski i ekološki benefit i veliki broj istraživanja se bavi njihovom primenom u sistemima sušenja prehrambenih proizvoda. Međutim, do njihove masovnije upotrebe u Republici Srbiji na farmama i u industriji još uvek nije došlo uprkos uloženim naporima i promovisanju. U ovom radu analizirane su performanse rada tipičnih konfiguracija sistema sušenja sa stanovišta postizanja maksimalnog koeficijenta grejanja pod određenim spoljnim uticajima i u zavisnosti od željenog režima sušenja. .

Published
2011

3. Energy efficiency analysis of corn seed drying process in Maize Research Institute 'Zemun Polje' - Zemun

Author

Zlatanović, Ivan, Gligorević, Kosta, Radojičić, Dušan, Dražić, Milan, Oljača, Mićo V., Dumanović, Zoran, Mišović, Miloš, Manić, Nebojša, and Rudonja, Nedžad

Subjects
natural gas, ekologija, corn seed, energetska efikasnost, prirodni gas, sušenje, drying, corncob, ecology, semenski kukuruz, energy efficiency, oklasak
Abstract

In this paper actual parameter analysis of corn seed energy efficiency drying process was performed in Maize Research Institute 'Zemun Polje' in Zemun. Energy consumption data and performances of old - natural gas based system and new - corncob combustion based system were compared and analyzed. This paper deals with basic improvement measures, biomass usage and corncob usage validation in this type of industrial systems. . U ovom radu je analizirana i ispitana energetska efikasnost sušenja semenskog kukuruza u doradnom centru Instituta za kukuruz 'Zemun Polje' u Zemunu. Podaci o radu starog sistema sušenja koji je kao energent koristio prirodni gas, analizirani su i upoređeni sa energetskim parametrima novog sistema, koji kao energent koristi usitnjeni oklasak dobijen u procesu krunjenja semenskog kukuruza. Rad se takođe bavi i razmatranjem ekoloških aspekata korišćenja oklaska kao goriva i tehno-ekonomskom opravdanošću primene ovakvog sistema sušenja. .

Published
2011

4. Condensing dryer with full air recirculation for agriculture application

Author

Zlatanović, Ivan, Rudonja, Nedžad, and Gligorević, Kosta

Subjects
ekologija, efficiency, regulation, sušenje, drying, ecology, energija, efikasnost, regulacija, energy
Abstract

Condensing dryer for agriculture application has notable advantages comparing with traditional drying methods, within fact that drying process is at low-temperature regime. Negative influence of dried fiber structure is minimized with full air recirculation. This technology is 'eco-friendly' and has no considerable effect on environment and ecology in negative meaning. Basics principles of most applied standards in food industry are mentioned in this paper. Kondenzaciona sušara ima i prednost u odnosu na druge metode sušenja u činjenici da je kod nje proces sušenja na niskotemperaturskom režimu što je veoma pogodno kod sušenja sirovine gde zahteva minimalan uticaj samog procesa na strukturu vlakana u negativnom smislu. Ova tehnologija sušenja spada u 'eco-friendly' ekološki prihvatljive tehnologije, što znači da nema bitnog uticaja na životnu sredinu i okruženje u kome se nalazi. U radu su predstavljene osobine ovakvog načina sušenja sa aspekta primene osnovnih principa strogih standarda prehrambene industrije.

Published
2010

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