Horse Dung Waste Utilization as a Household Energy Resource and Estimation of Biogas Production

Horses are still used as traditional transportation in Soreang, West Java. About 6-7 horses can produce 25 -30 kg of dung every day. Horse dung can produce biogas that can be used as an energy resource. A biogas reactor with capacity of 4 m(3) has been built in Soreang. The reactor is filled with a mixture of 50 kg of horse dung and 100 liters of water every two days. This research was conducted to observe the quality of biogas produced from the reactor and to estimate the volume of biogas produced per day. The observation of daily biogas production conducted in 22 days. Laboratory tests showed that the composition of gases contained in the produced biogas consists of 56.53% of CH4, 26.98% of CO2, 12.35% of N-2, 4.13% of O-2, and 0.007% of H-2. Daily biogas production data indicate a stationary trend. A moving average time series model is used to model the data. Using the model, it is estimated that the reactor can produce 0.240112 m(3) of biogas per day, which is sufficient to meet the energy needs of a household.