<![CDATA[Abstrak Biomassa merupakan sumber energi terbarukan dengan memanfaatkan limbah organik. Proses tersebut memiliki tiga proses fermentasi anaerob yaitu hidrolisis, asidogenesis, dan metanogenesis. Faktor lingkungan yang dapat mempengaruhi hasil produksi biogas adalah pH, dan temperatur. Penelitian ini menggunakan reaktor anaerobic buffled reactor (ABR) dengan kapasitas total 15 liter yang terdiri dari 2,5 liter ruang gas, 8 liter substrat nasi dan 4,5 liter bakteri rumen sapi. Meningkatnya pengkondisian temperatur maka hasil produksi gas juga akan semakin banyak. Volume total gas yang paling optimum dihasilkan pada temperatur 40 oC yaitu 11100 ml. Pada persentase gas hidrogen yang paling maksimum pada temperatur 35 oC yaitu 50,637 % dan jumlah padatan atau partikel terlarut di dalam air 1380 ppm. Temperatur 30 oC yang paling optimum dalam hasil produksi biogas dengan persentase metana 7,669 % menunjukkan pengkondisian mesofilik yang mampu bertahan pada fluktuasi temperatur ± 1 oC. Kata Kunci: Biomassa, anaerobic baffled reactor (ABR), pengkondisian temperatur. Abstract Biomass is a renewable energy source by utilizing the organic waste. This process has three anaerobic fermentation processes, such as hydrolysis, acidogenesis, and methanogenesis. Environmental factors which may affect the biogas production are pH and temperature. This research utilized an anaerobic buffled reactor (ABR) with a total capacity of 15 liters consisting of 2.5 liters of a gas chamber, 8 liters of rice substrate, and 4.5 liters of cow rumen bacteria. The enhancement of temperature conditioning, gas production would also have more result. Volume of total gas which was the most optimum was generated in temperature 40 oC was 11100 ml. The most optimum percentage of hydrogen gas in temperature 35 C was 50.637 % and total solids or soluble particles in the water was 1380 ppm. At a temperature of 35oC in the fermentation was 50.63 7% and the number of solids or particles dissolved in the water was 1380 ppm. The temperature of 30oC was the optimum temperature for biogas production with 7.669 % of methane indicated a mesophilic conditioning which as able to withstand the temperature fluctuations ±1oC. Keyword : Biomassa, anaerobic baffled reactor (ABR), temperature condition]]>
