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Evaluating the In-site Sorting of Solid Waste in Selected Educational Institutions – A Pilot Study

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Al-Hamaiedeh H. , Al-Rafiaha E. , Al-Khashman O. , Mohawesh O. , El Hanandeh A.

Journal of Ecological Engineering

2023

tom Vol. 24, nr 5

137--143

This study evaluated the process of in-site sorting of the generated solid waste (SW) in some educational institutions in Ma’an city, Jordan. The study included eight schools and one University. The students and employees of seven schools, as well as the students and employees of the University, had received the awareness campaigns concerning the importance and benefits of in-site sorting of SW. As a control, one school student and employee who had not received awareness campaigns were involved. The institutions were provided with four bins at each collection site (glass and plastic, paper and cardboard, metals, and bread). The content of bins in each institution was collected and sorted manually to evaluate the efficiency of the conducted awareness campaigns on onsite sorting behavior. The mass ratios of many SW components in their designated bins in the reference school (control) were higher than the average ratios in the assigned bins for the same component in all schools. As for the University, the results of the manual sorting showed that all bins included a mix of SW in different ratios; moreover, the proportions of glass and plastic, and metals were lower than the proportions of other components. On the basis of the above mentioned results, it can be concluded that the awareness campaigns did not achieve the stated goals; subsequently, the in-site sorting failed in the schools and the University. Thus, different awareness campaigns should be assessed to identify the best approach positively affect the SW sorting and disposal habits of people.

Modeling and Performance Analysis of Hydrogen Powered Hybrid Bike

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Gurunathan M. K. , Hynes N. R. J. , Bartoszuk M. , Sujana A. J. , Al-Khashman O.

tom Vol. 18, no 3

360--368

One of the most straightforward and affordable ways to produce hydrogen is by alkaline water electrolysis. In order to split water molecules into hydrogen and oxygen, an electrolyser is often subjected to current levels of 1.23V. The electrodes in an electrolytic cell are the primary structural component. The cathode electrode type is the one where hydrogen is created via the reduction reaction between the two types of electrodes. LPG is combined with hydrogen at a 4:1 ratio to lower the combustion energy because hydrogen cannot be used directly in a traditional SI engine due to its higher energy production during combustion. With the aid of a vaporizer unit, the hydrogen and LPG are combined in the necessary ratio. Through the bypass line created on the input manifold before the carburettor, where air is also mixed with the hydrogen-LPG fuel with the A/F ratio of 17:1 (stoichiometric ratio) for complete combustion, the fuel mixture is transported to the engine's combustion chamber. Due to the usage of LPG and hydrogen, full combustion may occur as a result of the production of a blue flame during combustion. Better mixing of the fuel and air can be achieved since the fuel mixture is conveyed in va-por state instead of semi-liquid form as in a conventional SI engine. This approach of using mix fuel (LPG+H2) for con-ventional SI engines can lower nitrogen oxide and hydrocarbon values in the exhaust gas more effectively.