Performance Analysis Biogas Digester From Cow Manure And Animal Feed Waste

Abstract

Energy is a very important need for all people. However, over time the energy we use will decrease because the energy we use is fossil-based. The utilization of new renewable energy needs to be developed to use to avoid energy shortages. Renewable energy comes from several renewable sources such as solar, wind and biomass. The main source of renewable energy comes from solar power. Meanwhile, biomass electricity can be sourced from organic waste, livestock manure, and so on. One of the biomass renewable energy is biogas. Biogas is a gas that can be produced by fermentation of organic materials. Biogas can be produced from animal waste, human waste, organic waste, household waste and so on. This research uses a fixed dome type digester with a volume of 8m³. The purpose of this research is to determine the performance of biogas digesters from cow dung and feed waste and to determine the pressure generated by biogas digesters from cow dung and feed waste. Using a mixture of cow dung, water, EM4 solution and cow feed waste in the ratio (70kg: 100liter: 50liter). The research method used was experimental method with direct observation on a fixed dome type digester with a volume of 8m³ This research resulted in an average temperature of 32°C, indicating an optimal temperature. At pH including into a good pH for biogas formation. The volume obtained in this study was the highest at 6, 19m³. In the characteristics of the flame in the second week the flame is still blue and red but still dominantly red but in the fourth week the characteristics of the flame are better with the flame produced more dominantly blue. In work efficiency, the degree of acidity (pH) shows an optimal pH as well as the resulting temperature is included in the optimal temperature, but stirring is also very influential in the process of biogas formation, where the substrate and water must be completely mixed evenly but should not be too dilute or too thick, because it can affect the growth of microorganisms.