| Summary: | The goal of this work is the feasibility of biogas as a green energy source produced from organic matter from ruminants, equine and farming activities in the central part of South Sulawesi. The study was conducted with survey and laboratory analysis to calculate the number of ruminants, corn, and rice stalk using supporting data from the South Sulawesi Statistics office. Amounts of 84,567, 112,915, and 3,579 ruminants have been raised in Maros, Gowa, and Makassar, respectively. While 6,757, 9,529, and 50 monogastric are raised in Maros, Gowa, and Makassar. Corn and rice stalks were produced 465,878.06 tons year-1 in Gowa and Maros. Every cattle and equine can produce feces up to 25 kg day-1 and 30 kg day-1, daily feces production equals 2,316,885; 3,108,745; and 90,975 kg day-1 in Maros, Gowa, and Makassar, respectively. These waste products can be converted to biogas as source of green energy with a total yield of 667,752,675,489.20 x 103 cc. Its production ratio is 1 kg dry matter: 1,051.3-liter biogas for beef feces and 1 kg dry matter: 3,980-liter biogas for equine feces and corn and rice stalks can be applied as organic fertilizer as a significant factor in anaerobic fermentation of biogas production.
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