Removal of endocrine disrupter compounds and trace organics in membrane bioreactors

Komesli, Okan Tarik
Endocrine disrupters and trace organic contaminants are recently recognized contaminants in wastewaters. Current concept is the multibarier approach where the contaminants are removed from the water cycle both by water and wastewater treatment facilities, as well as natural die-away. In this thesis work LC/MS/MS determination of selected EDC compounds, namely, diltiazem, progesterone, estrone, carbamazepine, benzyl butyl phthalate and acetaminophen, at ultra trace levels, have been carried out by optimizing analytical parameters. In addition, new methods were developed for their analysis in sludge samples at sub ppb levels. Following optimization and method development, occurrence of these contaminants in wastewaters and their removal in two full-scale and two pilot-scale membrane biological reactors (MBRs) was studied. Progesterone, estrone and acetaminophen were completely removed from wastewater by biodegradation. CBZ and diltiazem were not removed at all during the study. There was little effect of flux and sludge retention times on the removal of selected EDCs in these membrane plants. In SBR combined with membrane filtration, 13 different micropollutants, including Fluoxetine (FLX), Ibuprofen (IBP), Naproxen (NPX), Diclofenac (DCF), Carbamazepine (CBZ), Trimethoprim (TMP), Roxithromycin (ROX), Erythromycin (ERY), Sulfamethoxazole (SMX), Diazepam (DZP), Galaxolide (GLX), Tonalide (TON), Celestolide (CEL). CEL, GLX, TON and FLX were removed by adsorption onto the sludge while ROX, ERY, SMX, IBP and NPX were removed by biological degradation. The CBZ, DZP, TMP and DCF were not removed by biodegradation or adsorption. Whereas, following the addition of powdered activated carbon, all these compounds were removed entirely from the wastewater stream by accumulating in sludge


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Uzal, Niğmet; Yetiş, Ülkü; Department of Environmental Engineering (2007)
The objective of this study is to develop a membrane-based generic treatment scheme for wastewaters of indigo dyeing process of denim industry, based on water reuse. For this purpose, firstly the performances of microfiltration (MF), coagulation, and ultrafiltration (UF) processes were evaluated as pretreatment alternatives and the best pretreatment alternatives appeared to be single stage 5 m MF and sequential 5 m MF followed by 100 kDa UF providing high permeation rate and high color retention. These two ...
Occurrence, fate and removal of endocrine disrupting compounds (EDCs) in Turkish wastewater treatment plants
KOMESLİ, Okan Tarık; Muz, M.; Ak, M. S.; BAKIRDERE, Sezgin; Gökçay, Celal Ferdi (2015-10-01)
Endocrine disrupting compounds, EDCs, are somewhat recently recognized pollutants which are often classed within 'emerging micropollutants' in the environment jargon. These compounds are known to interfere with the delicate balance of the endocrine system of animals and man, causing variety of undesirable outcomes. Their sources in natural waters are the domestic and industrial effluents. The main cause of concern with EDCs is their tendency to accumulate in fish causing gender shifts and reduced fecundity....
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Ozanırk, Firat; Kalıpçılar, Halil; Yılmaz, Levent; Department of Chemical Engineering (2014)
Triethyl citrate (Ethyl citrate, TEC) is an environmentally friendly substance with a non-toxic structure, it does not give any harm or allergic effect on human beings. Therefore, it is widely used in food industry as a food additive, in pharmaceutical and toy industry as non-toxic plasticizers. Triethyl citrate is also used in cosmetics due to its anti-bacterial properties. The triethyl citrate is synthesized via the esterification of the citric acid with ethyl alcohol which is an equilibrium limited react...
Near-IR absorbing BODIPY derivatives as glutathione-activated photosensitizers for selective photodynamic action.
Turan, IS; Cakmak, FP; Kahraman, Deniz Cansen; Atalay, Rengül; Akkaya, EU (2014-12-01)
Enhanced spatiotemporal selectivity in photonic sensitization of dissolved molecular oxygen is an important target for improving the potential and the practical applications of photodynamic therapy. Considering the high intracellular glutathione concentrations within cancer cells, a series of BODIPY-based sensitizers that can generate cytotoxic singlet oxygen only after glutathione-mediated cleavage of the electron-sink module were designed and synthesized. Cell culture studies not only validate our design,...
Synthesis of calcium carbonate particles for biomedical applications
Oral, Çağatay Mert; Ercan, Batur; Department of Metallurgical and Materials Engineering (2020)
Calcium carbonate (CaCO3) particles have been widely used in biomedical applications owing to their biocompatibility and biodegradability. In order to effectively utilize CaCO3 particles in biomedical applications, their physical and chemical properties should be systematically controlled. However, this is a challenging task due to the presence of three different anhydrous CaCO3 polymorphs having complex crystallization behavior. In this thesis, CaCO3 particles were synthesized at distinct environments to c...
Citation Formats
O. T. Komesli, “Removal of endocrine disrupter compounds and trace organics in membrane bioreactors,” Ph.D. - Doctoral Program, Middle East Technical University, 2012.