Browsing by Author "Er, Eren"

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Başta denim yıkama suları olmak üzere tekstil yıkama sonucu oluşan atıksuların sıfır atık/temiz üretim yaklaşımı ile geri kazanımı için taşınabilir bir proses tasarımı ve prototip geliştirilmesi
(Bursa Uludağ Üniversitesi, 2023-07-20) Er, Eren; Yonar, Taner; Bursa Uludağ Üniversitesi/Fen Bilimleri Enstitüsü/Çevre Mühendisliği Anabilim Dalı.; 0000-0001-8139-1338
Bu tez çalışması kapsamında laboratuvar ortamında sentetik olarak hazırlanan indigomavisi sulu çözeltisinin Sn/Sb/Ni-Ti anot ve Pt-Ti katot kullanılarak elektrooksidasyonunyöntemiyle renk ve KOİ giderimi araştırılmıştır. Çalışmanın ilk aşamasında NaCl, KCl,Na₂SO₄ ve K₂SO₄ tuzları ile çalışılarak uygun destek elektrolit türü araştırılmıştır.Çalışmalara en uygun destek elektrolit türü olarak NaCl ile devam edilmiştir.Elektrooksidasyon da etkin olan pH, akım yoğunluğu, destek elektrolit konsantrasyonuve zaman parametreleri Merkezi Kompozit Tasarım (MKT) yoluyla tasarlamak için YanıtYüzeyi Yöntemi (YYY) kullanılmıştır. Tasarım, 4 faktör ve bunların 3 farklı seviyeleriile 7 merkez deneyi içermektedir. Renk ve KOİ giderimi için YYY neticesinde önerilenquadratik modelin F değeri renk giderimi için 22,71 ve KOİ giderimi için 29,59 olarakölçülmüştür. Korelasyon katsayısı değeri (R²) ise renk ve KOİ giderimi için sırasıyla% 95,21 ve % 96,28 olarak elde edilmiştir. Yüksek R² değeri, deney aralığında hesaplananve gözlemlenen sonuçlar arasında iyi bir uyum olduğunu göstermektedir YYY sonucundaoptimum koşullar pH: 11, akım yoğunluğu: 51,01 mA/cm², destek elektrolitkonsantrasyonu: 1565,66 mg/l ve süre: 120 dakika olarak bulunmuştur. Optimum şartlaraltındaki gerçekleştirilen kontrol deneyinde renk ve KOİ giderimi sırasıyla % 98,93 ve% 97,43, ayrıca enerji tüketimi 17,49 kWh/kg KOİ olarak bulunmuştur. Çalışmanın sonaşamasında bir prototip dizayn edilmiştir. Silindirik şeklindeki polietilen (PE) tankiçerisinde yerleştirilen teflon şase içerisindeki 3 anot ve 4 katot ile pilot ölçekteelektrooksidasyon yöntemiyle deneme çalışmaları yapılmıştır. YYY sonucunda bulunanoptimum koşullarda gerçekleştirilen çalışma neticesinde renk ve KOİ giderimi içinsonuçlar sırasıyla, % 95,26 ve % 92,16 bulunmuştur. Çalışmanın bulgularına göre,elektrooksidasyon yöntemiyle başta denim yıkama suları olmak üzere tekstil yıkamasonucu oluşan atıksuların arıtılması için umut verici olduğu düşünülmektedir.
Electro-oxidation of indigo blue aqueous solution for COD and color removal: RSM optimization and pilot-scale study
(Springer, 2023-08-18) Er, Eren; Gazigil, Leyla; Yonar, Taner; Er, Eren; GAZİGİL, LEYLA; YONAR, TANER; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0001-8139-1338; 0000-0002-8798-8933; AAY-9420-2020; AAX-9798-2021; AAD-9468-2019
In this study, the removal of indigo dye, which is used in the denim industry, by using the electro-oxidation method was investigated. Experiments were carried out using Sn/Sb/Ni-Ti anode and Pt-Ti cathode electrodes of indigo dye aqueous solution with an initial concentration of 100 mg/L, which was prepared synthetically in the laboratory. In the first stage of the study, appropriate support electrolyte (NaCl, KCl, Na2SO4, K2SO4) detection investigations were carried out. As a result of the trials, NaCl electrolyte was chosen as the supporting electrolyte type because it is both affordable and has high removal efficiency compared to other electrolytes. Color and COD removal were established according to the effective factors (pH, current density, supporting electrolyte concentration and electro-oxidation time) for the electro-oxidation method using the central composite design (CCD) based response surface methodology (RSM). The design consists of four components and seven central experiments, each with three levels. According to the RSM result, ideal conditions were pH 11, current density 51.01 mA/cm(2), supporting electrolyte concentration 1565.66 mg/L and duration 120 min. In ideal conditions, COD removal was determined as 97.43% and color removal as 98.93%, while energy consumption was determined as 17.49 kWh/kg COD. In the last stage of the study, pilot-scale tests were carried out in a spherical polyethylene (PE) tank with a bottom diameter of 65 cm and a height of 157 cm. Color and COD removal efficiencies obtained from the pilot scale under optimum conditions were calculated as 95.26% and 92.16%, respectively.
Electrochemical removal of cefazolin from aqueous media by novel composite anodes: Effects of electrolytes and operating parameters
(Elsevier, 2021-12-01) Kurt, Ayşe; Er, Eren; Neselen, Esra; Yonar, Taner; Kurt, Ayşe; Er, Eren; Neselen, Esra; YONAR, TANER; Bursa Uludağ Üniversitesi/Bilimsel ve Teknolojik Destekler Merkezi Araştırma Laboratuvarı; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0002-6032-7190; 0000-0001-8139-1338; 0000-0002-0387-0656; AAY-9420-2020; GZB-6111-2022; FNT-9826-2022; AAD-9468-2019
In this study, we aimed to investigate the capability of novel stable Ni-based anodes with platinized titanium cathodes to eliminate cefazolin antibiotics from aqueous media. For this purpose, different types of electrolytes were compared, and potassium chloride was found to be the optimal electrolyte for promoting the elimination of antibiotics, even at low concentrations. Thus, it may be possible to obtain higher removal efficiencies with real water/wastewaters, even without the addition of extra electrolytic chemicals, assuming the water being treated includes chloride ions. A pH of 7, which is the neutral pH value of the aqueous solution containing antibiotics, was defined as the optimal pH value as it provided the highest removal efficiencies. Thus, it may be possible to operate the process more easily and more economically by working at neutral pH values, as no additional chemical costs are incurred due to pH adjustment. Moreover, more efficient results were obtained at lower current densities with this anode in comparison to other studies on the electrochemical treatment of antibiotics in the literature. As a result of this study, electrochemical oxidation with Sb-doped SnO2 anodes was found to be very useful and successful for the removal of cefazolin from water in terms of both removal efficiency and cost effectiveness.
Pilot-scale test results of electrodialysis bipolar membrane for reverse-osmosis concentrate recovery
(Mdpi, 2022-01-01) Kestioğlu, O. Erdem; Gazigil, Leyla; GAZİGİL, LEYLA; Er, Eren; Yonar, Taner; YONAR, TANER; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0001-8139-1338; AAX-9798-2021; AEA-5887-2022; AAY-9420-2020
In this study, it is aimed to investigate the potential of electrodialysis bipolar membrane (EDBM) systems for the recovery of the concentrate originating from an organized industrial estate (OIE) wastewater treatment system with reverse osmosis (RO). Acids and bases were obtained from a pilot-scale treatment plant as a result of the research. Furthermore, the sustainability and affordability of acids and bases obtained by EDBM systems were investigated. Six cycles were carried out in continuous-flow mode with the EDBM system as batch cycles in the disposal of the concentrate and the production of acids and bases with the EDBM system. For each cycle, the EDBM system was operated for 66, 48, 66, and 80 min, respectively, and the last two cycles were operated for a total of 165 min (70 + 90) with 5 min of waiting. In the EDBM system, a working method was determined such that the cycle flow rate was 180 L/hour, energy to be given to the system was 25 V, and the working pressure was in the range of 0.8-2.5 bar. In the six cycles with the EDBM system, the concentrate, acid and base, conductivity, pH, and pressure increase values were investigated depending on time. Throughout all these studies, the cycles were continued over the products formed in the acid and base chamber. As a result of all the cycles, acid (HCl) production at a level of 1.44% and base (NaOH) production at a level of 2% were obtained.