Journal of Biological and Environmental Sciences

Permanent URI for this communityhttps://hdl.handle.net/11452/16880

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Biogas potential in Görükle campus of Uludağ University
(Uludağ Üniversitesi, 2016-10-08) Alibaş, İlknur; Erdoğan, Hilal; Yılmaz, Aslıhan; Alibaş, Kamil; Fen Bilimleri Enstitüsü; Biyosistem Mühendisliği Bölümü
In this study, the potential of animal manure of the Application Research Centres of the Faculty of Agriculture and the Ranch of Veterinary Medicine and located within the boundaries of Görükle Campus at Uludağ University, the waste of rapeseed, sunflower, and wheat production of the Agricultural Research and Application Centre at the Agricultural Faculty and food waste of all dining halls, restaurants and cafeterias, particularly the Central Dining Hall, situated on the campus was determined in order to determine the biogas potential of the campus. As the dry matter, based on the organic waste potential, the biogas potential relating of the campus was calculated to be 499962.91 m 3 . It was determined that 17.95% of this potential consisted of animal manure, 46.15% of it consisted of agricultural production waste and 35.90% of it consisted of food waste. It was calculated that the electric energy potential obtained by transforming the biogas potential into electric energy by means of a generator was 980.22 MWh.
Determination of microwave and convective drying characteristics of coriander leaves
(Uludağ Üniversitesi, 2017-07-04) Yılmaz, Aslıhan; Alibaş, İlknur; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü
Coriander leaves, which weighs 50 ±0.07 g with moisture of 7.531 ± 0.411 [kg(moisture) kg-1 (dry matter)], were dried using three drying methods, microwave, convective and natural drying. Drying continued until leaves moisture was reduced to 0.102 ± 0.0002 [kg(moisture) kg-1 (dry matter)]. Drying treatments in microwave drying powers were 100, 500 and 1000 W and drying periods lasted 9 – 76 min for microwave drying. While natural drying was lasted for 6 days, convective drying (50°C) was continued for 169 minutes. In this study, measured values of moisture were compared with predicted values obtained from several thin-layer equations. The best model for both 1000 W and 100 W microwave drying was Alibas’s model. Whereas the best model was determined as Verma’s model at 500 W, the most appropriate model was modified Henderson Pabis’s model in convective drying at 50°C. The optimum drying period, color and chlorophyll content were obtained by using the microwave drying at 500 W.
Determination of vacuum and air drying characteristics of celeriac slices
(Uludağ Üniversitesi, 2012) Alibaş, İlknur; Ziraat Fakültesi; Biyosistem Mühendisliği Bölümü
Celeriac slices (Apium graveolens L. var. rapaceum) weighing 100 g with moisture of 14.39 on a dry basis (kg[H2O].kg-1[DM]) were dried using vacuum drying. Drying was continued until leaf moisture fell to 0.1 on a dry basis (kg[H2O].kg-1[DM]). Six different pressures (0.1, 3, 7, 10, 13 and 17 kPa) and three different temperatures (55, 65, and 75°C) were used in the vacuum drying process. Air drying experiments were carried out at three different temperatures, 55, 65, and 75°C. In this study, measured values were compared with predicted values obtained from Page’s semi-empirical equation. The drying periods lasted 70-300 and 220-340 minutes for vacuum and air drying, respectively. Energy consumption was 1.01-2.00 and 0.84 -1.07 kWh for vacuum and air drying, respectively. Vacuum drying at 0.1 kPa and 75°C provided the optimal results with respect to drying period, colour, and energy consumption.

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