Performance of biogas from cattle manure in the energy consumption of a house

Abstract

In Peru, rural homes located in the countryside are dedicated to cattle farming, where the animal manure has no use, and some sectors of the population do not have access to electricity in their homes. In order to propose an optimal solution based on the resources of their livestock, the present work proposes to supply electricity to homes based on biogas obtained from cattle manure, for which, to obtain biogas from 149 cattle from the farm "Estación Experimental Agraria Satipo - Perú", the concept of circular economy was used in order to reduce pollution by using the manure residues that go through the processes of hydrolysis, acidogenesis, ketogenesis and methanogenesis in anaerobic digestion by the action of microorganisms, these have been analysed on the basis of tropical climate with a ratio of 1: 1 of manure:water with a hydraulic retention of 40 days, this process is necessary to supply the electrical equipment with biogas, likewise, a house was chosen with basic equipment, which has been used as a sample, electric cooker, electric shower, microwave oven, computer, iron, refrigerator, television, being appliances of primary need. Finally, the required dimensions of the biodigester are obtained, a reservoir of 30 m3 gave us a production of 14.9 m3/day of biogas. A house with basic appliances requires 4.95 kWh and 0.32 m3/hr of biogas. From the 0.62 m3/hr produced, a saving of s/2.48 soles per hour of energy consumed by the household is achieved.