Browsing by Author "Ozturk, D."

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Advanced Treatment of Poultry Slaughterhouse Wastewater Using Electrocoagulation and Peroxidation: Parametric Analysis and Process Optimization
(Springer, 2023) Toh, Y. P.; Bashir, M. J. K.; Guo, X.; Wong, L. P.; Ozturk, D.; Amr, S. S. A.; Lim, J. W.
In this research, electrocoagulation-intensified peroxidation using an aluminum electrode was studied as a post-treatment method for poultry slaughterhouse wastewater (SWW) with 4 operational variables (pH, current density, contact time, and H2O2 dosage). Optimization was carried out using response surface methodology. Analysis of variance was used to analyze the experimental data, and a second-order model was created to test the effects of process parameters on treatment performance. The optimum conditions were chosen as follows: pH 5.83, 0.18 g/L H2O2 dosage, 58.60 min contact time, and current density of 4.21 mA/cm(2). The compatibility of the predicted optimum conditions has been verified by experimental data. As a result of the experiments performed under optimum conditions, COD, TSS, and color removals were found to be 97.89%, 99.31%, and 98.56%, respectively. The difference between experimental and predicted values was found to be less than 0.86%. The final treated effluent met the discharge standards determined by the World Bank, EU, US, and Malaysian Department of Environment. Under optimum conditions, the cost of treating 1 cubic meter of SWW was calculated as 3.02 MYR ($ 0.68).
Cod Removal From Mixed Dye Wastewater Using Natural Pyrite Ore by Heterogeneous Fenton Process
(Avestia Publishing, 2021) Ozturk, D.
In this study, it was aimed to remove COD from wastewater prepared from a mixture of rhodamine 6G, methyl orange, and crystal violet dyes using natural pyrite ore as a heterogeneous fenton catalyst. The parameters of pH (2-9), H2O2 concentration (0.5-5 g/L), and catalyst dosage (0.5-5 g/L), which are thought to have major effects on the heterogeneous fenton process in COD removal, were investigated in a batch system. Characterization studies of natural pyrite ore were performed by X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-Ray Spectroscopy (EDX), and Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy analyses. According to the data obtained, optimum values were determined as pH of 2, H2O2 concentration of 2 g/L, and 1.5 g/L of catalyst dosage. The COD removal efficiency was calculated as 94.7% under optimum conditions. According to the characterization results, it was determined that the pyrite ore contains (wt. %) Fe (44.87%) and S (51.02%) in a major proportion. The pyrite ore had a well crystalline and irregular structure. The fingerprint bands such as Fe-O, Fe-S are determined by FTIR spectrum. Pyrite was found as an effective catalyst for COD removal in this study and can be used as a promising catalyst in future heterogeneous fenton studies by expanding its catalyst property. © 2021, Avestia Publishing. All rights reserved.
Distribution of Antiseptic Resistance Genes in Staphylococcus Spp. From Bovine Mastitis
(Czech Academy Agricultural Sciences, 2017) Ergun, Y.; Cantekin, Z.; Gurturk, K.; Solmaz, H.; Ekin, I. H.; Ozturk, D.
The purpose of this study was the determination of antiseptic resistance genes (qacA/B and qacC) from staphylococcal mastitis in cattle in various regions of Turkey. In total, 283 isolates (Burdur: 36, Hatay: 47 and Van: 200) were studied, and the antiseptic resistance genes were detected using simplex PCR. The distribution of the qacA/B and qacC genes, mediating resistance against quaternary ammonium compounds, was found to vary among the different isolates. The qacA/B genes were found in three of the Burdur isolates, six of the Hatay isolates and seven of the Van isolates. The qacC gene was found in two of the Burdur isolates, none of the Hatay isolates and two of the Van isolates. The presence of these genes and transmission among Staphylococcus spp. strains may pose risks in the control of mastitis, as well as to public health.
Electrochemical Mineralization of Abattoir Wastewater With Continuous System
(Springer, 2021) Ozturk, D.; Yilmaz, A. E.; Sapci Ayas, Z.
This study aims to determine the effects of initial pollutant concentration level (1/1-1/4), flow rate (10-40 mL/min), NaCl concentration (0.1-1 M), pH (3-9) and current density (4.73-23.67 mA/cm(2)) parameters on the removals of total suspended solids, total organic carbon, chemical oxygen demand, total nitrogen and color for economic treatment of cattle-abattoir wastewater using mesh-type Ti/Pt anodes with continuous EO system. Total suspended solids, total organic carbon, chemical oxygen demand, total nitrogen and color analyses were carried out according to photometric method, catalytic oxidation method, closed reflux colorimetric method, nitrogen cell test method and platinum-cobalt method, respectively. The effluent chloride levels were analyzed according to the argentometric titration method. According to results, all operational parameters had an impact on removal efficiencies but the most effective parameters on energy consumption were NaCl concentration and applied current density. Although two possible system conditions were determined according to removal efficiencies the operating conditions with the lowest energy consumption are considered to be optimal. The optimum operating conditions were determined as NaCl concentration of 1 M, CD of 4.73 mA/cm(2), initial pH of 7.03, reaction temperature of 25 degrees C and FR of 10 mL/min. Under these conditions removal efficiencies (%) for total suspended solids, total organic carbon, chemical oxygen demand, total nitrogen and color were found as; 98.28, 93.03, 97.44, 95.53 and 99.80, respectively. The energy consumption values were calculated as 2.42 kWh/kg COD and 19.43 kWh/m(3). The approximate cost to treat 1 m(3) wastewater was calculated as $ 6.43. The kinetic behavior abided by a pseudo-first-order model.
Electrochemical Mineralization of Abattoir Wastewater With Continuous System (Vol 18, Pg 3761, 2021)
(Springer, 2022) Ozturk, D.; Yilmaz, A. E.; Sapci Ayas, Z.
Investigation of Electrochemical Degradation of Basic Red 13 Dye in Aqueous Solutions Based on Cod Removal: Numerical Optimization Approach
(Springer, 2020) Ozturk, D.; Yilmaz, A. E.
The aim of this study was to remove Basic Red 13 dye by electrochemical oxidation with Ti/Pt anodes and to numerically optimize the operating conditions such as current density (5-20 mA/cm(2)), flow rate (10-50 mL/min), initial pH (2-9) and supporting electrolyte concentration (10-100 mM) by using response surface methodology. Chemical oxygen demand analysis which was chosen as a response was performed according to closed reflux colorimetric method. Also, the effluent chloride levels were analyzed with the argentometric method. Momentary temperature, pH and electrical conductivity readings were taken with a multimeter. Although a number of possible system conditions were obtained with numerical optimization, the system operating conditions with the lowest energy consumption are considered to be optimal. From the quadratic model formed from central composite design in response surface methodology with numerical analysis, the optimum conditions were determined to be 4.38 for initial pH, 19.53 mA/cm(2) for current density, 40.78 mL/min for flow rate and 85.57 mM for supporting electrolyte concentration. At these optimum points, chemical oxygen demand removal efficiency was calculated as 99.98% and energy consumption values of the system were calculated as 7.91 kW h/m(3) and 0.98 kW h/kgCOD. Under these conditions when an industrial system is operated, the chemical oxygen demand removal yield will be 99.98% and the approximate cost of the system will be $1.25 to treat 1 ton of wastewater.