بررسي آزمايشگاهي زيست پالايي و نور كافت داروي انروفلاكساسين در يك واحد پيشتاز بيولوژيكي چرخان آكنده ساختار يافته و واحد تابش فرابنفش

چكيده انگليسي :

An Experimental Study on Bioremediation and Photolysis of Enrofloxacin in Pilot Plant Structured Packing Rotating Biological Contactor spRBC Pilot Plant and Ultra Violet Radiation Unit Ghasem Zamanpour g zamanpour@yahoo com June 08 2013 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Arjomand Mehrabani Zeinabad arjomand@cc iut ac ir Abstract Presence of pharmaceutical active compounds in the environment due to the large amounts of drugs used in medical veterinary and agricultural activities have been considered as an environmental problem in the developed countries in the recent decade Earlier the existence of pharmaceuticals in the environment had a little importance Although their presence was reported in sewage treatment plant effluents it was thought that these compounds would be easily degraded in the environment just same as degradation in the human body Even though these drugs and their metabolites have been partially eliminated in the environment during the adsorption aerobic and anaerobic processes they may reach the water resources in the end The pharmaceuticals within the sludge can be degraded during the digestion process However some of these compounds remained unchanged The existence of PhACs in the environment and consequently in the water due to its adverse effects on public health has been a cause of concern Harmful effects of the PhACs in environment can point to toxicity of the aquatics resistance development of pathogenic bacteria genotoxicity and endocrine disorders Enrofloxacin is a fluoroquinolone which has an antibacterial capability against many pathogenic bacteria in animals During years of 1990 6 over 7 000 tons of antibiotics were taken in poultries of Iran About 20 of the total taken antibiotics was Eenrofloxacin Conventional wastewater treatment methods unable to act as a reliable process for degrade pharmaceuticals Therefore applying advanced treatment technologies alongside the conventional methods in case of detecting these contaminants are necessary Several methods of advanced treatment are used to achieve this goal Chemical oxidation by chlorination and photolysis membrane filtration such as reverse osmosis and Nano filters and activated carbon adsorption are some of these methods Advanced Oxidation Processes are effective in the degradation of contaminants in the water Many drugs need to be protected against UV radiation and visible light Drugs with low photostability would be degraded by UV Radiation In this research all biological treatment experiments were performed in structured packing Rotating Biological Contactor The designed bioreactor was built of a transparent polycarbonate container The container was composed of three distinct compartments The media for growth of bio film in this system was of polypropylene structured packing with the specific surface of 240 m2 m3 In the constructed system the used packing was formed in cylinders with a diameter of 20 cm and length 30 cm Special structure of the packing led to an appropriate mixing of liquor in the container which reduces the possibility of formation of dead zones The driving force for rotation of shaft and attached packing was supplied by a motor which through a gearbox Shaft was rotated with a constant speed of 10 rpm The spRBC was designed in for submerging of 40 of the packing in the mixed liquor In order to create a suitable environment for the UV radiation and further oxidation of contaminants in wastewater a setup was designed and built The system was a triangular shaped channel made by galvanized steel with length of 150 cm and 16cm for each side of triangle A UV radiator lamp was assembled at upper section of channel The effluent from the spRBC passes through the length of the channel Reflection characteristic of the used galvanized sheet made the maximum usage of UV energy possible due to its reflection property The applied UV Lamp in

زمانپور، قاسم

بررسي آزمايشگاهي زيست پالايي و نور كافت داروي انروفلاكساسين در يك واحد پيشتاز بيولوژيكي چرخان آكنده ساختار يافته و واحد تابش فرابنفش

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