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biyogaz enerji değeri m 3 /gün olarak değerlendirilmiştir. Bununla birlikte hayvansal atıklardan 277.348 m 3 /gün, atık su arıtma çamurundan 515.220 m 3 /gün, tarımsal atıklardan 38.493 m 3 /gün ve mutfak atıklarından 160.380 m 3 /gün olarak bulunmuştur. Abstract Biogas production is important in terms of energy recovery and elimination of organic wastes. Organic wastes and industrial wastewater used as substrates in biogas production worldwide are not sufficiently evaluated in our country. In our country, agricultural and livestock production continuously increases with organic wastes. Similarly, the population of our country continuously tends to increase, thus the amount of organic waste is also increasing. Biogas production potential attracts attention due to the fact that the potential of organic waste in our country is very high especially in the capital city of Ankara. In this study, the amount of biogas production from these wastes was determined by considering the animal wastes, kitchen wastes, wastewater treatment plant wastes and agricultural wastes of Ankara, which has a large part of the country's population. As a result, the theoretical biogas energy value that can be produced from organic wastes in Ankara was evaluated as m 3 / day in this study. 277.348 m 3 /day from animal wastes, 9.789.180 m 3 /day from waste water treatment sludge, 38.493 m 3 /day from agricultural wastes, 160.380 m 3 /day from kitchen wastes have been found.

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In this study, glass fiber-reinforced composite materials were produced by hand lay-up with different number of layers of glass fiber, and tensile, flexural and impact fatigue strength of composite materials were investigated. The samples were also metallographically characterized. Depending on the number of fiber layers of samples mechanical properties and impact fatigue strength were examined. Due to the increase in the number of fiber layers, the mechanical properties of the samples were found to be improved.