Cow farm waste is one type of raw material that commonly used in biogas formation technology. According to 1 Wahyuni (2013), a cow can produce fresh between 20 29 kg/day. 2 Kaharudin and Sukmawati (2010), on household scale with number livestock 2-4 cows or supply dung approximately 25 kg/day sufficient use reactor tube capacity 2500-5000 liters which equivalent oil. land/day able meet the ener...