Question

Determine the volume of fixed dome biogas digester for the output of four cows and also determine the thermal power available from biogas plant. take following data: dry matter produced = 2 kg/day/cow retention time = 30 days biogas yield = 0.25 m3/kg of dry matter percentage of dry matter in cow dung = 18% burner efficiency = 70% density of slurry = 1090 kg/m3 heating value of biogas = 23 mj/m3

Answer 1

Answer:

Biogas from cow manure with 1 kg produced as much as 40 liters of biogas,while chicken dung with the same amount produced 70 liters. Biogas has a high energy content which is not less than the energy content of the fuel fossil [6]. The calorific value of 1 m3 biogas is equivalent to 0.6 - 0.8 liters of kerosene.