Utilization of Organic Waste as An Alternative Energy with A Heat Transfer Approach Sri Wuryanti
Politeknik Negeri Bandung
Abstract
Biogas is produced by the anaerobic degradation of organic matter and is mainly composed of methane (CH4). Therefore, the substance is a suitable alternative source of energy. This biofuel may be acquired through waste management, particularly from the processing of household refuse and sewage. Previous research evaluated only the Calorific Value or Higher Heating Value (HHV) of the gas. However, this study aims to analyze heat transfer through the convection of hot gases during combustion. The magnitude of the coefficient of this procedure is highly dependent on the turbulence value. This parameter, in turn, influences the transference rate. Subsequently, a 1558 L capacity bio-digester processed 750 kg mixed household waste, 750 L water, 7 kg Green Phoskko (GP-7), and 50 kg cow dung to generate 75 L of biofuel whose optimum composition was 50.35% CH4, 17.65% N2, 8.98% H2 and 23.02% CO2. Also, the results obtained were juxtaposed with those of two other alkane fuels. The maximum turbulence was determined to be 1100000, 480000, and 290000 while the minimum values were 570000, 270000, and 150000, for butane, heptane, and the best biogas mixture, respectively.
