ESİN BALCI - Academia.edu (original) (raw)

Papers by ESİN BALCI

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2018

Uludağ University Journal of The Faculty of Engineering, Nov 1, 2016

Öz: Dünya genelinde endüstriyel faaliyetlerdeki gelişmeler, su tüketiminin artmasına ve endüstriy... more Öz: Dünya genelinde endüstriyel faaliyetlerdeki gelişmeler, su tüketiminin artmasına ve endüstriyel su kirlenmesi problemlerinin yaygınlaşmasına neden olmaktadır. Artan su kıtlığı problemleriyle beraber bu durum, aşırı su tüketilen endüstrilerin atıksularından yeniden kullanılabilir kalitede suyun geri kazanıldığı teknolojik uygulamaların hayata geçirilmesini gerekli kılmaktadır. Bu çalışmada, ultrafiltrasyon (UF), nanofiltrasyon (NF) ve ters osmoz (TO) membran prosesleri kullanılarak; 6,22±0.03 pH, 1130±321 mg TÇK/L, 2362±727 mg KOİ/L ve 744±234 mg TOK/L giriş değerlerindeki tekstil yıkama atıksularından, proseste yeniden kullanıma uygun kalitede suyun geri kazanılması amaçlanmıştır. Bu bağlamda, membran proseslerin saha ölçek kurulumları için ana belirleyici p arametre olan membran türünün, arzu edilir kalitede yıkama suyu geri kazanımı üzerine etkisi araştırılmıştır. Deneysel çalışmalar, UF ve NF prosesler için 4'er, TO prosesi için ise 5 farklı membran kullanılarak; atıksuyun kendi pH'sında, 25 ºC'da ve 300 rpm'lik çapraz akış hızıyla UF, NF ve TO için sırasıyla 8, 12 ve 40 bar'lık membran geçiş basıncı şartlarında yerine getirilmiştir. Deneyler neticesinde, UF, NF ve TO için sırasıyla UH050, NF270 ve LFC-3 membranlarının en iyi performans veren membranlar oldu ğu belirlenmiştir. Çalışma sonucunda, tekstil yıkama atıksularından UF/NF/TO birleşik sistemi kullanılarak, 6,34 pH, 6 mg TÇK/L, 34 mg KOİ/L ve 14 mg TOK/L ile proseste yeniden kullanıma uygun kalitede suyun geri kazanılabileceği ortaya konmuştur.

Uludağ üniversitesi mühendislik fakültesi dergisi, Dec 16, 2016

DOAJ (DOAJ: Directory of Open Access Journals), Jun 29, 2018

Pamukkale University Journal of Engineering Sciences, 2018

Bu çalışmada, etkinliği bilinen UF/NFsıkı/TO membran kombinasyonu ile tekstil atıksularının arıtı... more Bu çalışmada, etkinliği bilinen UF/NFsıkı/TO membran kombinasyonu ile tekstil atıksularının arıtımının yanısıra %75-80 su geri kazanım oranı dahilinde oluşan membran konsantrelerinin, bütünleşik ileri oksidasyon prosesi (Fenton ve foto-Fenton (UVA-365-UVC-254))/batık UF sistemi ile daha önce belirlenen optimum işletme şartlarında oksidasyona tabi tutularak yönetimi gerçekleştirilmiştir. Yapılan deneysel çalışmalar sonucunda, UF/NFsıkı/TO membran konfigürasyonu ile arıtımı sonucunda oluşan konsantre akımlarının Fenton, foto-Fenton (UVA-365) ve (UVC-254) prosesleri/batık UF sistemi ile oksidasyonu sonrası, ardışık işletimli foto-Fenton (UVC-254)/UH050 hibrit prosesinin 9.88 H2O2/TOK ve 7.27 H2O2/Fe 2 + oranlarında, 44 L/m 2 .sa'lik süzüntü akısında %86 KOİ giderimi ile KOİ değeri 167 mg/L'ye ve %74.2 TOK giderimi ile TOK değeri 104 mg/L'ye kadar düşürülerek en iyi performans gösteren yenilikçi proses olduğu sonucuna varılmıştır. Oluşan membran konsantrelerin oksidasyonu sonrasında kalan konsantrenin tehlikelilik özellikleri, bertaraf/geri kazanım yöntemleri ve yeniden kullanım alternatifleri değerlendirildiğinde tekstil endüstrisi atıksularının foto-Fenton (UVA-365) ile arıtımı sonucunda oluşan konsantre haricinde diğer tüm konsantrelerin tehlikeli özelliğine sahip olduğu görülmüştür. Konsantrelerin bertaraf/geri kazanım yöntemleri ayrıntılı olarak değerlendirildiğinde, gerekli düzenlemeler (nem içeriği, susuzlaştırma, uygun debi ve/veya karışım oranları) yapıldığı takdirde bu konsantrelerin düzenli depolama, yakma ve merkezi atıksu arıtma sistemine verme gibi seçeneklerle bertaraf edilebileceği sonucuna varılmıştır. In this study, in addition to textile wastewater treatment by UF/NFtight/TO membrane combination of which efficiency is known, management has been performed for membrane concentrates generated with advanced oxidation combined process (Fenton and photo-Fenton (UVA-365-UVC-254))/submerged UF system of membrane concentrates generated within 75-80% water recovery ratio by oxidizing them in optimum operating conditions which were determined before. Ultimately in the studies, the conclusion has been reached that concentrate flows, generated as a result of the treatment with UF/NFtight/TO membrane configuration, were the highest performance innovative process by decreasing the sequential operated photo-Fenton (UVC-254)/UH050 hybrid process in ratios of 9.88 H2O2/TOK and 7.27 H2O2/Fe 2 +, in the filtration flux of 44 L/m 2 .h, COD value to 167 mg/L with 86% COD removal, and TOK value to 104 mg/L with 74.2% TOC removal, after the oxidation with Fenton, photo-Fenton (UVA-365) and (UVC-254)/ submerged UF system processes. When hazardous characteristics, removal/recovery methods and reuse alternatives of the concentrate remained after the oxidation of membrane concentrates generated were evaluated, it has been seen that all other concentrates of textile industry wastewater, except the concentrate generated by the treatment with photo-Fenton (UVA-365), had characteristics of hazardousness When removal/recovery methods were evaluated in detail, the conclusion has been reached that these concentrates could be removed with alternative options such as regular storage, burning and canalizing to central wastewater treatment system as long as necessary arrangements (moisture content, dehydration, suitable flow and/or mixture ratios) are made.

Uludağ University Journal of The Faculty of Engineering, 2016

Developments in industrial activities around the world lead to increase water consumption and to ... more Developments in industrial activities around the world lead to increase water consumption and to become widespread industrial water pollution problems. This situation accompanied by increasing water shortage issues needs to be realized technological applications which include recovering water in reusable quality from wastewaters of excessive water-consuming industries. In this study, recovering water in reusable quality from textile washing wastewaters having 6.22±0.03 pH, 1130±321 mg TDS/L, 2362±727 mg COD/L and 744±234 mg TOC/L was aimed using ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membrane processes. In this respect, effect of membrane type as the main parameter for real-scale installations on reusable water quality was examined. Experiments were performed using four membranes each for UF and NF and five for RO at the conditions of original pH, 25 oC and 300 rpm cross-flow rate in trans-membrane pressures of 8, 12 and 40 bar for UF, NF and RO, respecti...

The Handbook of Environmental Chemistry

Science of The Total Environment, 2020

Gas and particle SMC concentrations showed a similar trend with time. • Gas-PM 10 and gaswindow f... more Gas and particle SMC concentrations showed a similar trend with time. • Gas-PM 10 and gaswindow film SMC concentrations were correlated. • Gasdust and gaswindow film partitioning coefficient values were correlated. • SMCs found in gas phase and partition to PM 10 , dust, and window film. • Unaccounted surfaces were most probably significant reservoirs for SMCs.

Environmental Technology & Innovation

Environment Systems and Decisions

In the study, a multipurpose reverse logistics network has been designed to create effectual mana... more In the study, a multipurpose reverse logistics network has been designed to create effectual management of medical waste (MW) generated in 39 districts of Istanbul, a heavily populated city, during the COVID-19 pandemic as well as that to be generated in the next decade. With the model, the medical waste management system in Istanbul is analyzed during the pandemic and for the next 10 years. The model attempts to integrate economic, environmental, and social objectives within the sustainable development goals. It aims to maximize the number of personnel and government earnings for the estimated MW of a megacity while minimizing the total fixed cost and the cost of carbon emissions and transportation. The results indicated that the existing facilities are sufficient for the treatment and disposal of MW generated even under pandemic conditions. However, the capacity of the sterilization facility could be insufficient to treat the estimated amount of MW in the next decade. Opening a sterilization facility near the sanitary landfill in Komurcuoda with a total management cost of 62,450,332 €/year would be an optimum solution for Istanbul MW. In comparison to the single-purpose model results, the multipurpose model resulted in approximately 42,000 € more in total cost. Sensitivity analyses show that the amount of MW has the most significant effect on the total cost. This simple model created an effective MW management proposal for Istanbul, which can be a model for megacities.

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

Nano zero-valent iron (nZVI) emerges as a low cost and eco-friendly adsorbent to treat textile wa... more Nano zero-valent iron (nZVI) emerges as a low cost and eco-friendly adsorbent to treat textile wastewater, which is rich in dye content. However nZVI particles can easily agglomerate in aqueous environment due to electrostatic interaction, decreasing their treatment efficiency. Therefore pumice, a low-cost and naturally found porous material with lower specific surface area (2m 2 /gr), can be used as support material to reduce agglomeration of nZVI. Treatment efficiencies of pumice/nZVI packing (10:0 and 9:1 (w/w)) in column reactor for specified initial methylene blue concentrations (25, 50, 75 and 100 mg/L) were investigated in this study. Adsorption capacities of the adsorbents were calculated as 2.8 and 4.2 mg/g-adsorbent, respectively at 100 mg/L initial methylene blue concentration. Mixed bed column performed significantly better than its pumiceonly counterpart for low initial concentrations. Thomas adsorption model was applied to experimental results with a moderate to high predictive power.

Science of The Total Environment, 2019

Novel membrane oxidation reactor was demonstrated for textile wastewater treatment. • Hybrid Fent... more Novel membrane oxidation reactor was demonstrated for textile wastewater treatment. • Hybrid Fenton/photo-Fenton treatment was performed accompanied by submerged UF. • High level efficiencies were provided with reduced chemicals and processing time. • Effluents produced by hybrid reactor could be directly discharged to sewer systems. • Developed technologies seem very feasible for wastewater treatment and water recovery.