Ömer F Kemik is a Chemist from Kocaeli, Turkey. He graduated from Kocaeli University with MSc degree in Chemistry in 2009. He is currently PhD student at Kocaeli University and also works for İZAYDAŞ which is the only hazardous waste incineration plant of Turkey. He has expertise especially in hydrogels for environmental purposes and proficiency testing in wide scope.

Hazardous waste disposal is one of the biggest environmental issues of last decades. Incineration is a way to disposal of hazardous wastes and has many advantages beside disadvantages. One of the most important disadvantages is effluents which contain heavy metal ions as pollutants. Unlike some other organic pollutants, heavy metals are nonbiodegradable, highly toxic and carcinogenic. In addition, due to their high solubility in water, even very low concentration results in ecological problems, so it is necessary to remove these ions. Different methods or materials have been used, new techniques and materials have been tried to develop or improve to find more effective ways to remove such ions from wastewater. Hydrogels are crosslinked hydrophilic polymers that are widely used in the purification of wastewater. Due to their high swelling in water, ability to control the diffusion process, swelling response to changes in ionic strength, pH and temperature and also the capability to bind heavy metal ions through the polar functional groups which interact selectively and strongly with heavy metal ions, moreover easy handling and reusability make hydrogels promising materials for water purification. Macroinimer which has the properties of macromonomers, macrocrosslinkers and macroinitiator in a macrostructure, was used to prepare novel hydrogels with higher metal binding capacity than present hydrogels. Novel hydrogels were prepared by oil-in-water high internal phase emulsion copolymerization of 2-hydroxy ethylmethacrylate, N-isopropylacrylamide and N,N′-methylenebis(acrylamide) as crosslinker at room temperature. Macroinimer was used as co-surfactant and co-crosslinker. Varying amounts of N-isopropylacrylamide and macroinimer were used to prepare hydrogels. Swelling properties of all hydrogels was investigated at different temperatures. Also hydrogels were used as binding materials for different heavy metals such as Pb, Cr and Hg from hazardous waste incineration plant effluent to identify the best fitting hydrogel composition for heavy metal ion binding capability.

Tea Sirac has graduated from Faculty of Food Technology and Biotechnology at the University of Zagreb in 2016. She is a Master of Molecular Biotechnology. From 2017. she has been working at Faculty of Food Technology and Biotechnology as a Scientific Assistant in a Laboratory for the Biological Wastewater Treatment. Tea Sirac has been participant at IWA MEWE 2016 in the field of Microbial ecology in aerobic granular sludge processes, and at 16th Ružička days within the topic: Environmental Protection.

Biological nutrient removal (BNR) of nitrogen and phosphorus has been widely used in wastewater treatment practice to control eutrophication in receiving water bodies. The most widely used nitrogen removal methods are biological nitrification (aerobic transformation of NH4-N to NO2-N and NO3-N), and denitrification methods (anoxic reduction of NO3-N to N2). Simultaneous nitrification-denitrification process (SND), in compare to conventional biological nitrogen removal process, can offer several advantages including reducing carbon source and alkalinity consumption, low energy consumption, high nutrients removal efficiencies, and simplifying the treatment system. P removal is achieved through enhanced biological phosphorus removal (EBPR) under alternating anaerobic–aerobic conditions. Biological nutrient removal (N and P) in batch anoxic experiments was investigated. The initial concentration of P and N were 10-18 mg PO43—P/L and 48±2 mg NH4+-N/L. Sodium acetate was used as carbon source, at C/N 1 to C/N 7. Results indicated that the increase of C/N ratio improved efficiency of N removal in a range from 14.3 % at C/N 1 to 89,7 % at C/N 7. And also, the highest P removal of 61% was achieved at C/N 4. Nutrient removal was achieved by simultaneous nitrification and denitrification, and phosphorus removal.

I has completed his PhD at the age of 35 years from Hanyang University and postdoctoral studies from OKAYAMA University School of Mechanical engineeing. He is the professor of Songwon Univeristy in Korea. He has published more than 45 papers in reputed journals and has been serving as a member of repute.

The SCR technology for the control of NOx emission from Marine Diesel engine was brought to the IMO Tier 3 regulation for marine diesel engine applications. SCR system is effective over a wide temperature region to reduce NOx emission from engine exhaust emission during rich and lean operations. In this paper, SCR catalyst of V2O5-WO3/TiO2 is investigated and modeled. A global ammonia SCR reaction mechanism has been used, kinetic parameters for SCR system of NOx by Urea was developed for V2O5-WO3/TiO2 SCR catalysts. The kinetic analysis was carried out using a commercial one-dimensional aftertreatment code, coupled with an optimizer. In this paper, the development of a steady kinetic model of the Urea-SCR process for vanadium-based catalysts is presented. The model was based on the results from reactivity, chemistry, catalytic mechanism, and kinetics of NH3-TPD, NH3 oxidation, NO oxidation, NO: NO2 ratio, space velocity and NH3/NOx ratio over a commercial V2O5-WO3/TiO2 catalyst performed in our laboratories.