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Öğe Evaluation of railway versus highway emissions using LCA approach between the two cities of Middle Anatolia(Elsevier Ltd., 2019) Bilgili, Levent; Kuzu, S. Levent; Çetinkaya, Afşin Yusuf; Kumar, PrashantTransfer of people and transportation of goods is an indispensable part of our daily lives. Choosing the most environmentally friendly alternative will have the least impact on human health, ecosystem, and the materials. This study aims to carry out a comparative assessment of various emission scenarios from highway and railway transportation between Kırşehir and Niğde-Ulukışla in the middle Anatolian Peninsula, in Turkey, to allow making an optimum decision from an environmental viewpoint. Currently, the transportation is sustained through highway, which has 232.6?km length between the cities used as a case study. High-speed railway construction is projected on the same route. We formed different capacity alternatives as alternative scenarios and life cycle assessment approach was applied to these scenarios. Environmental damage ratio decreased with the increasing utilization ratio of the railway. The greatest change was seen in ecosystem quality. We also assessed emissions during the construction activities of both railway and highway. A social cost-benefit analysis suggested that damage cost in the current situation was €562,000. The scenario with 100% replacement of highway with railway transportation showed the lowest damage cost (€157,000) while the highest damage cost was due to NOx emissions.Öğe Investigation of EU environmental policies from the past to the future in the LCA perspective(Peter Lang Publishing Group, 2020) Bilgili, Levent; Çetinkaya, Afşin Yusuf; Kuzu, Sadullah Leventevent Bilgili, Afşin Yusuf Çetinkaya, Sadullah Levent Kuzu Investigation of EU Environmental Policies from the Past to the Future in the LCA Perspective Introduction According to the First Law of Thermodynamics, energy can be transformed from one form to another but can be neither created nor destroyed. This law tells us that there is a great balance of energy in nature. This energy balance appears not only in engineering but also in all environmental, social and economic cycles. Humanity, like all other living things in nature, has lived in harmony with environmental cycles in nature for millennia, and there is no waste in any environmental cycle. The energy entering the system does not disappear, changes shape and emerges as another type of energy. The waste products generated during this change process are used as input to another system and a new cycle begins. After the 18th century, when industrial production began, man-made artificial products started to produce outputs that could not be used as energy inputs in any system by disrupting this cycle, and nature was introduced to a concept that did not belong to it: Waste. Waste generation is a part of industrial production and is a process that has the potential to cause great environmental damage if not avoided.Öğe Life cycle assessment and greenhouse gas emission evaluation from Aksaray solid waste disposal facility(SPRINGER INTERNATIONAL PUBLISHING AG, 2018) Çetinkaya, Afşin Yusuf; Bilgili, Levent; Kuzu, LeventLife cycle assessment (LCA) is a popular tool used to assess the environmental performance of municipal solid waste (MSW) management systems. In this study, LCA method was used to determine the best municipal solid waste management strategy for Aksaray city, Turkey. Four different scenarios were developed as an alternative to the existing waste management system and evaluated for the best environmental solution. The scenario with 75% landfilling-25% composting provided the best results in terms of human health and environmental impact. Current emissions from the present MSW facility were estimated for methane and carbon dioxide emissions. Annual emissions in 2017 were 8674 and 3161 t year(-1) for CO2 and CH4, respectively. The estimated ground-level concentrations of these emissions were 30 and 50 mu g m(-3) for CO2 and CH4, respectively. Both modeled CO2 and CH4 concentrations were expressed as CO2(eq). The total radiative forcing was calculated as 0.021 W m(-2).Öğe Life cycle comparison of membrane capacitive deionization and reverse osmosis membrane for textile wastewater treatment(Springer International Publishing, 2019) Çetinkaya, Afşin Yılmaz; Bilgili, LeventThe reduced natural water sources on the one hand and the large amount of wastewater produced by the textile industry on the other hand lead to the requirement of an effective reuse of textile wastewater. In this study, the treatment of textile wastewater by the reverse osmosis membrane system and membrane capacitive deionization (MCDI) system has been investigated to improve the quality and the recovery rate of the effluent for reclamation. The maximum chemical oxygen demand (COD) removal efficiency obtained at 10 bar was 96.3% for BW30 reverse osmosis membrane. Diversified operating conditions, including working voltage and flow rate, were investigated systematically in the MCDI system which is an effective water purification technology. According to the obtained experimental results, the COD removal efficiency was thoroughly increased by rising the working voltage (from 0.2 to 1.2 V) and the flow rate (from 5 to 17.5 ml/min). The flow rate and the working voltage at which the COD from textile wastewater removal ratio was the highest were 10 ml/min and 1.2 V, respectively. A life cycle approach has also been implemented for the comparison of environmental impact assessment of the two desalination systems. In this study, a life cycle approach has been implemented for the comparison of environmental friendly impact assessment of the two desalination systems. It is concluded that MCDI system is much more environmental friendlier with 5641 times less values for damage assessment categories, on average.
