RESUMO
The fate and removal of six selected endocrine disrupting compounds in a lab-scale anaerobic/aerobic (A/O) sequencing batch reactor (SBR), operating at 5 days, solids retention time (SRT) were investigated. A carbamazepine (CBZ), acetaminophen (ATP), diltiazem (DTZ), butyl benzyl phthalate (BBP), estrone and progesterone mix was spiked as model endocrine disrupting compounds (EDC) into domestic wastewater obtained from a nearby sewage treatment plant. The influent, effluent and sludge samples from the SBR unit were analysed by using an LC/MS/MS instrument equipped with electrospray ionization. More than 80% removal was observed for all the EDCs tested. It was found that biodegradation is the most important mechanism for BBP, ATP and progesterone. Biodegradation constants were calculated according to the simplified Monod model for these compounds. The DTZ seemed to have lower rate of biodegradation. The CBZ appeared totally resistant to biodegradation. However, it presented a high rate of sorption onto the sludge and was thereby treated. This contradicts with the literature studies.
Assuntos
Reatores Biológicos/microbiologia , Disruptores Endócrinos/isolamento & purificação , Poluentes Químicos da Água/isolamento & purificação , Acetaminofen/análise , Acetaminofen/isolamento & purificação , Acetaminofen/metabolismo , Adsorção , Carbamazepina/análise , Carbamazepina/isolamento & purificação , Carbamazepina/metabolismo , Diltiazem/análise , Diltiazem/isolamento & purificação , Diltiazem/metabolismo , Disruptores Endócrinos/análise , Disruptores Endócrinos/metabolismo , Estrona/análise , Estrona/isolamento & purificação , Estrona/metabolismo , Ácidos Ftálicos/análise , Ácidos Ftálicos/isolamento & purificação , Ácidos Ftálicos/metabolismo , Progesterona/análise , Progesterona/isolamento & purificação , Progesterona/metabolismo , Esgotos/análise , Águas Residuárias/análise , Poluentes Químicos da Água/análise , Poluentes Químicos da Água/metabolismoRESUMO
In this study, the presence of Ornithobacterium rhinotracheale infection in the avian population in the Marmara and the Western Black Sea region was investigated. Trachea samples were randomly obtained from 96 chickens sent to slaughterhouses. The seroprevalance of the infection was determined in 384 blood sera. Ninety-six of these 384 samples belonged to animals from which trachea samples were obtained. Eleven (11.46%) O. rhinotracheale were isolated in 96 trachea samples taken from 10 different flocks brought to the slaughterhouse. Serotype A was the predominant serotype among the 11 isolates of O. rhinotracheale. One isolate could not be serotyped. O. rhinotracheale antibodies were detected in 251 (64.4%) of the 384 sera, while 55 (14.3%) and 78 (20.3%) were suspected and negative, respectively.
