RANCANG BANGUN DAN PENGUJIAN ALAT PRODUKSI BIOGAS DARI KOTORAN SAPI DENGAN VARIASI JUMLAH MIKROBA

Abstract

Biogas is an alternative energy in the form of gas produced from organic materials. The biggest component of biogas is methane (CH4 , 54-80% volume) and carbon dioxide (20-45% volume) and a small amount of oxygen, H2 , N2 and H2S. The process of making biogas is carried out in fermentation, namely the process of forming methane gas under anaerobic conditions with the help of anaerobic bacteria in a digester so that methane (CH4 ) and carbon dioxide (CO2 ) gases are produced which are larger than hydrogen (H2 ), nitrogen (N2 ) and sulfide acid (H2S). This study aims to make biogas from organic waste materials and cow dung by conducting variations of microorganisms to see how much biogas is produced with a short span of time. The variation of Green Phoskko-7 (GP-7) microorganisms is 250 gr, 350 gr and 450 gr with a fixed composition and material concentration of 133 kg of cow dung: 66 liters of water (2: 1) which is fermented for 7 days with a fixed temperature 35ºC. The results of this study showed that the optimum amount was 450 grams of GP-7 with a volume of 0.338467 m3 and a methane level of 33.492 mol%